Difference between revisions of "OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/English-timed"

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|-
 
|-
 
| 00:01
 
| 00:01
−
| Hello and welcome to the spoken tutorial on '''creating Curved geometry in OpenFOAM'''
+
| Hello and welcome to the spoken tutorial on '''Creating Curved geometry in OpenFOAM'''
  
 
|-
 
|-
−
| 00:07
+
| 00:06
 
| In this tutorial I will show you  
 
| In this tutorial I will show you  
−
 
  
 
|-
 
|-
 
| 00:09
 
| 00:09
 
|'''Steps''' for creating  a '''curved geometry in openfoam'''
 
|'''Steps''' for creating  a '''curved geometry in openfoam'''
−
 
  
 
|-
 
|-
 
| 00:14
 
| 00:14
−
|Viewing the '''results in paraview'''
+
|Viewing the results in '''paraview'''
  
 
|-
 
|-
−
| 00:18
+
| 00:17
 
|To record this tutorial  
 
|To record this tutorial  
−
 
  
 
|-
 
|-
 
| 00:19
 
| 00:19
 
|I am using '''Linux Operating system Ubuntu version 10.04'''.  '''OpenFOAM version 2.1.0 '''
 
|I am using '''Linux Operating system Ubuntu version 10.04'''.  '''OpenFOAM version 2.1.0 '''
−
 
  
 
|-
 
|-
Line 36: Line 32:
  
 
|-
 
|-
−
| 00:33
+
| 00:32
 
|We will create a '''geometry''' for '''flow over cylinder'''.
 
|We will create a '''geometry''' for '''flow over cylinder'''.
−
 
  
 
|-
 
|-
−
| 00:37
+
| 00:36
 
|Note that I am using this case just for '''explanation'''.
 
|Note that I am using this case just for '''explanation'''.
−
 
  
 
|-
 
|-
−
| 00:42
+
| 00:41
 
|The '''cylinder '''is in a form of a '''semi circle.'''
 
|The '''cylinder '''is in a form of a '''semi circle.'''
−
 
  
 
|-
 
|-
 
| 00:45
 
| 00:45
−
|'''Meshing is a body fitted grid'''.
+
|'''Meshing''' is a body fitted grid.
−
 
+
  
 
|-
 
|-
Line 63: Line 55:
 
| 00:54
 
| 00:54
 
|We break the '''semi circle''' into equal number of '''parts'''.
 
|We break the '''semi circle''' into equal number of '''parts'''.
−
 
  
 
|-
 
|-
−
| 00:59
+
| 00:58
 
|Now minimise this
 
|Now minimise this
  
 
|-
 
|-
−
| 01:04
+
| 01:03
 
| Open a '''blockMeshDict '''file of the previous tutorial
 
| Open a '''blockMeshDict '''file of the previous tutorial
−
 
  
 
|-
 
|-
 
| 01:08
 
| 01:08
 
|I have already opened it
 
|I have already opened it
−
 
  
 
|-
 
|-
Line 84: Line 73:
  
 
|-
 
|-
−
|  01:21
+
|  01:20
 
|  Now Create a new '''blockMeshDict''' file  
 
|  Now Create a new '''blockMeshDict''' file  
−
 
  
 
|-
 
|-
Line 98: Line 86:
 
|-
 
|-
 
|  01:34
 
|  01:34
−
|  name this as '''blockMeshDict'''.
+
|  Name this as '''blockMeshDict'''.
−
 
+
  
 
|-
 
|-
−
| 01:41
+
| 01:40
−
|Note that '''M and D here are capital'''
+
|Note that M and D here are capital
−
 
+
  
 
|-
 
|-
 
| 01:46
 
| 01:46
−
|'''Open this'''
+
|Open this
  
 
|-
 
|-
 
|  01:51
 
|  01:51
−
| Now you can copy the initial few lines from the '''lid driven cavity upto convertTometers'''
+
| Now you can copy the initial few lines from the '''lid driven cavity''' upto '''convertTometers'''
  
 
|-
 
|-
Line 120: Line 106:
 
|-
 
|-
 
| 02:04
 
| 02:04
−
|  '''Copy this''' and '''paste it''' in the new '''blockMeshDict file'''
+
|  '''Copy this''' and '''paste it''' in the new '''blockMeshDict''' file
  
 
|-
 
|-
 
| 02:12
 
| 02:12
−
|Now  Change the '''convert to meters''' from '''point one to one'''
+
|Now  change the '''convert to meters''' from '''point one to one'''
  
 
|-
 
|-
Line 132: Line 118:
 
|-
 
|-
 
| 02:24
 
| 02:24
−
| Now press enter ,  press enter again
+
| Now press '''enter''' ,  press '''enter''' again
  
 
|-
 
|-
 
|02:28
 
|02:28
−
| After this you need to enter the '''co-ordinates''' of the''' geometry''' in '''vertices'''
+
| After this you need to enter the '''co-ordinates''' of the''' geometry''' in '''vertices'''
−
 
+
  
 
|-
 
|-
 
| 02:35
 
| 02:35
−
|Let me switch back to the slide.Note that the points should be ordered  in such a way starting from '''0,1,2,3''' and so on. as shown in the figure
+
|Let me switch back to the slide. Note that the points should be ordered  in such a way starting from '''0,1,2,3, 4''' and so on. as shown in the figure
  
 
|-
 
|-
 
|  02:47
 
|  02:47
−
| Minimise the slide. Now type '''vertices''' in the '''blockMeshDict''' file and press enter
+
| Minimise the slide. Now type '''vertices''' in the '''blockMeshDict''' file and press '''Enter'''
  
 
|-
 
|-
−
|  02:57
+
|  02:56
−
| Insert the '''open bracket ''' and Press enter
+
| Insert the open bracket and Press '''Enter'''
  
 
|-
 
|-
Line 156: Line 141:
  
 
|-
 
|-
−
|  03: 05
+
|  03:05
 
| Let me switch back to the slides
 
| Let me switch back to the slides
  
 
|-
 
|-
 
| 03:08
 
| 03:08
−
|  For '''explanation''' I will use '''right half of the semi-circle'''
+
|  For explanation I will use right half of the semi-circle
  
 
|-
 
|-
 
|  03:12
 
|  03:12
−
| Enter the values for the points in the figure starting '''from 0'''
+
| Enter the values for the points in the figure starting from 0
−
 
+
  
 
|-
 
|-
Line 174: Line 158:
 
|-
 
|-
 
|03:20
 
|03:20
−
|  leave some space and enter '''co-ordinates''' of '''point 0'''
+
|  leave some space and enter the '''co-ordinates''' of '''point 0'''
  
 
|-
 
|-
 
|  03:27
 
|  03:27
−
|  Open close bracket  enter '''(0.5 (space) 0 (space) 0)'''. Press Enter
+
|  Open close bracket  enter '''0.5 (space) 0 (space) 0'''. Press Enter
  
 
|-
 
|-
 
|  03:36
 
|  03:36
−
| Again leave some space , '''open close bracket '''
+
| Again leave some space , open close bracket
  
 
|-
 
|-
 
| 03:39
 
| 03:39
−
|Enter co-ordinates for point  (1 (space) 0 (space) 0) Press enter
+
|Enter co-ordinates for point  1 (space) 0 (space) 0. Press enter
  
 
|-
 
|-
 
| 03:45
 
| 03:45
−
|Now leave two '''vertical spaces''' , again  press enter
+
|Now leave two '''vertical spaces''' , again  press '''Enter''', again  press '''Enter'''
−
 
+
 
−
|-
+
−
| 03:49
+
−
|  again  press enter
+
−
 
+
 
|-
 
|-
 
| 03:51
 
| 03:51
Line 202: Line 182:
 
|-
 
|-
 
| 03:57
 
| 03:57
−
| '''Open close bracket''',''' enter (0.707 (space) 0.707 (space) 0)'''
+
| Open,  close bracket, enter '''0.707 (space) 0.707 (space) 0'''
  
 
|-
 
|-
 
|  04:05
 
|  04:05
−
|  Press enter. Leave some space
+
|  Press '''Enter'''. Leave some space
−
 
+
  
 
|-
 
|-
 
| 04:09
 
| 04:09
−
|'''Open close bracket'''
+
|Open, close bracket
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
|  04:11
+
|  04:10
−
|  '''Enter the co-ordinates for the  point 5'''
+
|  Enter the co-ordinates for the  point 5
−
 
+
  
 
|-
 
|-
 
| 04:13
 
| 04:13
−
|'''Enter (0.353 (space) 0.353 (space) 0)''', press enter
+
|Enter ''' 0.353 (space) 0.353 (space) 0''', press '''Enter'''
  
 
|-
 
|-
 
|04:22
 
|04:22
−
| '''I leave 4 vertical spaces''' and  
+
| Now leave 4 vertical spaces and enter co-ordinates for point number 9
−
 
+
−
|-
+
−
| 04:24
+
−
|  '''Enter co-ordinates for point number 9'''
+
  
 
|-
 
|-
 
|  04:27
 
|  04:27
−
| '''1 2 3 4 ,''' again press enter, leave some space  
+
| '''1 2 3 4 ,''' again press '''Enter''', leave some space  
−
 
+
  
 
|-
 
|-
 
| 04:34
 
| 04:34
−
|'''Open close bracket '''
+
|Open, close bracket
  
 
|-
 
|-
 
| 04:36
 
| 04:36
−
|  Enter '''(0 (space) 1 (space) 0)''', press enter
+
|  Enter '''0 (space) 1 (space) 0''', press '''Enter'''
  
 
|-
 
|-
 
|  04:42
 
|  04:42
 
|  Leave some space
 
|  Leave some space
−
 
  
 
|-
 
|-
 
| 04:44
 
| 04:44
−
|Enter '''co-ordinates''' for '''point number 10'''
+
|Enter '''co-ordinates''' for point number 10
  
 
|-
 
|-
−
| 04:47
+
| 04:46
−
|  Open close bracket''' (0 (space) 0.5 (space) 0)''' and press enter
+
|  Open close bracket ''' 0 (space) 0.5 (space) 0''' and press '''Enter'''
  
 
|-
 
|-
−
| 04:55
+
| 04:54
−
|  Similarly '''enter the co-ordinates for the remaining points''' in the geometry.
+
|  Similarly enter the co-ordinates for the remaining points in the geometry.
−
 
+
  
 
|-
 
|-
 
| 05:00
 
| 05:00
−
|Insert a close bracket  put a''' semi-colon '''Press enter
+
|Insert a close bracket  put a''' semi-colon''' and press '''Enter'''
−
 
+
  
 
|-
 
|-
 
| 05:05
 
| 05:05
−
|Again press enter
+
|Again press '''Enter'''
  
 
|-
 
|-
−
| 05:07
+
| 05:06
−
| Now '''Type blocks''' press enter
+
| Now type '''blocks''', press '''enter'''
−
 
+
  
 
|-
 
|-
 
| 05:13
 
| 05:13
−
|Insert a '''open bracket''' press enter
+
|Insert a open bracket press '''enter'''
  
 
|-
 
|-
−
| 05:17
+
| 05:16
 
| Let me switch back to the slides
 
| Let me switch back to the slides
  
Line 291: Line 257:
  
 
|-
 
|-
−
|05:25
+
|05:24
 
|Now let me switch back to the '''blockMeshDict file'''
 
|Now let me switch back to the '''blockMeshDict file'''
  
Line 297: Line 263:
 
| 05:28
 
| 05:28
 
| Leave some space
 
| Leave some space
−
 
−
 
−
|-
 
−
| 05:31
 
−
|Now Enter the type of '''block i.e. Hex'''
 
−
 
  
 
|-
 
|-
−
| 05:35
+
| 05:30
−
|leave some space
+
|Now enter the type of  block i.e. '''Hex''' leave some space
  
 
|-
 
|-
 
|  05:37
 
|  05:37
 
|  Now enter the''' points''' for the '''blocks'''
 
|  Now enter the''' points''' for the '''blocks'''
−
 
  
 
|-
 
|-
 
| 05:41
 
| 05:41
−
|'''Open close brackets'''
+
| Open, close brackets
−
 
+
  
 
|-
 
|-
−
| 05:44
+
| 05:43
−
|Leave some space
+
|Leave some space, the '''simple grading''' can be kept as '''(1 1 1) ''' and press enter
−
 
+
−
|-
+
−
| 05:46
+
−
|  the '''simple grading''' can be kept as '''(1 1 1) ''' press enter
+
  
 
|-
 
|-
 
|  05:55
 
|  05:55
−
| For creating the '''blocks''' please refer to the '''tutorial'''  
+
| For creating the '''blocks''' please refer to the '''tutorial''' on '''creating simple geometry in OpenFOAM'''
−
 
+
  
 
|-
 
|-
−
| 05:58
+
| 06:02
−
|on '''creating simple geometry in OpenFOAM'''
+
|Note that there will be more number of '''blocks''' in this example
−
 
+
  
 
|-
 
|-
−
| 06:03
+
| 06:07
−
|'''Note that''' there will be more number of '''blocks''' in this example
+
|Now insert a close bracket
−
 
+
−
|-
+
−
| 06:08
+
−
|Now '''Insert a close bracket'''
+
−
 
+
  
 
|-
 
|-
 
| 06:10
 
| 06:10
−
|'''Insert a semi-colon'''   press enter. Again press enter
+
|Insert a semi-colon, and  press '''Enter'''. Again press '''Enter'''
  
 
|-
 
|-
 
| 06:16
 
| 06:16
−
| in the next line type '''edges''' and press enter
+
| In the next line type '''edges''' and press '''Enter'''
−
 
+
  
 
|-
 
|-
 
| 06:22
 
| 06:22
−
|insert a '''open bracket''' and press enter
+
|insert a open bracket and press '''Enter'''
  
 
|-
 
|-
 
|  06:26
 
|  06:26
−
|  Here you need to enter the '''points''' which are the '''end points of the arcs'''
+
|  Here you need to enter the '''points''' which are the end points of the arcs
  
 
|-
 
|-
 
| 06:31
 
| 06:31
−
|Leave some space and '''type arc'''  leave some space
+
|Leave some space and type '''arc'''  leave some space type the points which are the end points of the arc
−
 
+
  
 
|-
 
|-
−
| 06:37
+
| 06:40
−
|Type the points which are the '''end points of the arc'''
+
|Let me switch back to the slide. Now insert the end points of the arc
  
 
|-
 
|-
−
| 06:41
+
| 06:46
−
|Let me switch back to the slide.Now  insert the '''end points of the arc'''
+
|In this we get, we start with arc '''0 5'''
−
 
+
  
 
|-
 
|-
−
| 06:47
+
| 06:52
−
|In this we get,We '''start''' with arc '''0 5'''
+
−
 
+
−
 
+
−
|-
+
−
| 06:53
+
 
|Let me switch back to the '''blockMeshDict file'''
 
|Let me switch back to the '''blockMeshDict file'''
−
 
  
 
|-
 
|-
 
| 06:56
 
| 06:56
−
|Enter''' 0 space 5'''
+
|Enter ''' 0 space 5'''
  
 
|-
 
|-
−
| 07:00
+
| 06:59
−
| Leave some space  
+
| Leave some space insert open, close bracket
−
 
+
−
 
+
−
|-
+
−
| 07:02
+
−
|Insert '''open close bracket'''
+
  
 
|-
 
|-
 
|07:04
 
|07:04
 
| In  the bracket  enter the co-ordinate of any '''intermediate''' point in between the two '''arc points'''.
 
| In  the bracket  enter the co-ordinate of any '''intermediate''' point in between the two '''arc points'''.
−
 
  
 
|-
 
|-
−
| 07:12
+
| 07:11
−
|Now Let me switch back again to slides
+
|Now let me switch back again to slides
  
 
|-
 
|-
−
| 07:15
+
| 07:14
 
| In the figure you can see that you have to pick up a point  in between the two end  points of the arc.
 
| In the figure you can see that you have to pick up a point  in between the two end  points of the arc.
  
 
|-
 
|-
−
| 07:24
+
| 07:23
 
|In this geometry I have picked up '''right half''' of the circle  
 
|In this geometry I have picked up '''right half''' of the circle  
  
 
|-
 
|-
 
| 07:28
 
| 07:28
−
| Using '''simple geometric relations'''  
+
| Using '''simple geometric relations''' you can find the co-ordinates of the intermediate point as shown in the semi-circle
−
 
+
−
 
+
−
|-
+
−
| 07:31
+
−
|you can find the co-ordinates of the intermediate point as shown in the semi-circle
+
  
 
|-
 
|-
−
| 07:39
+
| 07:38
 
| Similarly you can '''repeat''' the procedure for rest of the '''semi-circle geometry'''
 
| Similarly you can '''repeat''' the procedure for rest of the '''semi-circle geometry'''
  
Line 433: Line 360:
 
|Now  let me switch back to the '''blockMeshDict file'''
 
|Now  let me switch back to the '''blockMeshDict file'''
  
 +
|-
 +
| 07:48
 +
| press '''Enter'''
  
 
|-
 
|-
−
| 07:49
+
| 07:50
−
| press enter
+
| Note that there are more number of arcs in this example
  
 
|-
 
|-
−
| 07:51
+
| 07:55
−
| '''Note that there are more number of arcs in this example'''
+
| Insert a close bracket
  
 
|-
 
|-
−
| 08:00
+
| 07:58
−
|''' Insert a close bracket'''
+
|Insert a semi -colon  press '''Enter''' again press '''Enter'''
−
 
+
  
 
|-
 
|-
−
| 08:03
+
| 08:02
−
|'''Insert a semi -colon  press enter''' again press enter
+
| Now enter the boundary patches after arcs
  
 
|-
 
|-
−
| 08:08
+
| 08:06
−
| |Now '''Enter the boundary patches after arcs'''
+
|Refer to the tutorial on Simple geometry in '''OpenFOAM''', for entering the '''boundary patches'''
−
 
+
  
 
|-
 
|-
−
| 08:11
+
| 08:12
−
|'''Refer to the tutorial on Simple geometry in OpenFOAM '''
+
| Enter '''boundary''',press '''Enter'''
−
 
+
  
 
|-
 
|-
 
| 08:15
 
| 08:15
−
|For entering the '''boundary patches'''
+
|Insert open bracket  press '''Enter'''. Insert close bracket  semi-colon press '''Enter'''
  
 
|-
 
|-
−
| 08:18
+
| 08:21
−
| Enter '''boundary''',press enter
+
|Again press '''Enter'''
−
 
+
  
 
|-
 
|-
−
| 08:20
+
| 08:24
−
|'''Insert open bracket  press enter'''.''' Insert close bracket  semi-colon press enter'''
+
| Now In the next line type '''mergePatchPairs'''
−
 
+
  
 
|-
 
|-
−
| 08:27
+
| 08:29
−
|Again press enter
+
|Note that '''P''' here is capital
  
 
|-
 
|-
−
| 08:29
+
| 08:31
−
| Now In the next line type '''mergePatchPairs'''
+
| Press '''Enter'''
−
 
+
  
 
|-
 
|-
−
| 08:35
+
| 08:33
−
|Note that '''P here is capital'''
+
|Insert a open bracket,  press '''Enter'''
  
 
|-
 
|-
−
| 08:37
+
| 08:36
−
| Press enter
+
| Since there are '''no patches''' to be '''merged''' this can be kept empty
−
 
+
  
 
|-
 
|-
−
| 08:39
+
| 08:40
−
|Insert a '''open bracket'''  press enter
+
|Insert a close bracket
  
 
|-
 
|-
 
| 08:42
 
| 08:42
−
| Since there are '''no patches''' to be '''merged''' this can be kept empty
+
|Insert a '''semi -colon '''and press '''Enter'''
−
 
+
  
 
|-
 
|-
 
| 08:46
 
| 08:46
−
|Insert a '''close bracket'''
 
−
 
−
 
−
|-
 
−
| 08:48
 
−
|Insert a '''semi -colon '''and press enter
 
−
 
−
|-
 
−
| 08:51
 
 
|Let me switch back to the slides
 
|Let me switch back to the slides
−
 
  
 
|-
 
|-
−
| 08:54
+
| 08:49
−
|Similarly enter the '''co-ordinate''' points for the points in the '''front face''' of unit thickness of the '''geometry'''
+
|Similarly enter the '''co-ordinate''' points for the points in the '''front face''' of unit thickness of the '''geometry''' as shown in the figure  
−
 
+
−
 
+
−
|-
+
−
| 09:01
+
−
|as shown in the figure  
+
  
 
|-
 
|-
−
| 09:03
+
| 08:57
−
| Open a '''Command terminal'''
+
| Now open a '''Command terminal'''
  
 
|-
 
|-
−
| 09:06
+
| 09:00
 
| In the '''command terminal''' type the path for your case file
 
| In the '''command terminal''' type the path for your case file
  
 
|-
 
|-
−
| 09:09
+
| 09:04
−
| I have already set the path for the '''tutorial case of flow over cylinder'''
+
| I have already set the path for the tutorial case of flow over cylinder
  
 
|-
 
|-
−
| 09:15
+
| 09:10
−
|  In the '''terminal''' type '''blockMesh '''for '''meshing''' the geometry''' and press enter'''
+
|  In the '''terminal''' type '''blockMesh '''for '''meshing''' the geometry and press '''enter'''
−
 
+
  
 
|-
 
|-
−
| 09:23
+
| 09:18
−
|Meshing is done
+
|'''Meshing''' is done
  
 
|-
 
|-
−
|09:25
+
|09:20
−
|Now '''Type paraFoam''' in the terminal  and press enter to view the geometry
+
|Now type '''paraFoam''' in the '''terminal''' and press '''enter''' to view the geometry
  
 
|-
 
|-
−
|09:32
+
|09:26
 
| Let me drag this to the capture area
 
| Let me drag this to the capture area
  
 
|-
 
|-
−
| 09:35
+
| 09:30
 
| Now on  '''left-hand''' side of '''object inspector menu''' click '''Apply'''
 
| Now on  '''left-hand''' side of '''object inspector menu''' click '''Apply'''
−
 
  
 
|-
 
|-
−
| 09:42
+
| 09:36
 
|  '''geometry''' will be created as seen in the '''paraview window'''
 
|  '''geometry''' will be created as seen in the '''paraview window'''
  
 
|-
 
|-
−
| 09:47
+
| 09:41
 
| Scroll down the '''Object inspector menu'''
 
| Scroll down the '''Object inspector menu'''
  
 
|-
 
|-
−
|09:50
+
|09:44
−
|  '''Check or uncheck the Mesh field box'''
+
|  Check or uncheck the '''Mesh''' field box
  
 
|-
 
|-
−
| 09:55
+
| 09:49
−
| You can see '''different regions''' of the geometry.
+
| You can see different regions of the geometry.
−
 
+
  
 
|-
 
|-
−
| 09:58
+
| 09:53
 
|You can also see the''' wire frame '''of the geometry
 
|You can also see the''' wire frame '''of the geometry
  
 
|-
 
|-
−
| 10:01
+
| 09:56
−
|On top of  the'''active variable control menu''' in the '''drop down menu'''
+
|On top of  the '''active variable control menu''',  in the drop down menu change from '''Surface''' to '''wireframe'''
−
 
+
  
 
|-
 
|-
−
| 10:07
+
| 10:05
−
|Change from '''Surface to wireframe'''
+
| You can see the '''wireframe model''' of the geometry
  
 
|-
 
|-
 
| 10:11
 
| 10:11
−
| You can see the '''wireframe model''' of the geometry
+
|Close this. Let me switch back to the slides
−
 
+
  
 
|-
 
|-
 
| 10:16
 
| 10:16
−
|close this. Let me switch back to the slides
 
−
 
−
|-
 
−
| 10:21
 
 
| In this tutorial we learnt:
 
| In this tutorial we learnt:
  
 
|-
 
|-
−
| 10:23
+
| 10:17
−
|How to '''create a curved geometry'''.
+
|How to create a curved geometry.
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| 10:26
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|How to '''enter points for edges in OpenFOAM'''
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|How to enter points for edges in '''OpenFOAM'''
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| 10:29
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| 10:24
 
|This brings us to the end of the tutorial
 
|This brings us to the end of the tutorial
  
 
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|10:33
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|10:28
 
| As an Assignment
 
| As an Assignment
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| 10:34
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| 10:29
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|Create a geometry with '''inner semi-circle of radius 2 meters'''
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|Create a geometry with inner semi-circle of radius 2 meters and outer semi- circle of radius 4 meters  and View the geometry in '''paraview'''
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| 10:39
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| 10:42
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|'''and outer semi- circle of radius 4 meters'''
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| 10:44
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|and View the geometry in '''paraview'''
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| 10:48
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| Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken_Tutorial  
 
| Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken_Tutorial  
  
 
|-
 
|-
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| 10:51
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| 10:45
 
|It summarizes the Spoken Tutorial project.  
 
|It summarizes the Spoken Tutorial project.  
  
 
|-
 
|-
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| 10:53
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| 10:48
 
|If you do not have good bandwidth, you can download and watch it.  
 
|If you do not have good bandwidth, you can download and watch it.  
  
 
|-
 
|-
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| 10:58
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| 10:53
 
| The Spoken Tutorial Project Team
 
| The Spoken Tutorial Project Team
  
 
|-
 
|-
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| 11:00
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| 10:56
 
|Conducts workshops using spoken tutorials
 
|Conducts workshops using spoken tutorials
  
 
|-
 
|-
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| 11:04
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| 10:58
 
|Gives certificates to those who pass an online test
 
|Gives certificates to those who pass an online test
  
 
|-
 
|-
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| 11:07
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| 11:02
 
|For more details, please write to contact@spoken-tutorial.com
 
|For more details, please write to contact@spoken-tutorial.com
  
 
|-
 
|-
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|11:15
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|11:09
 
|Spoken Tutorials are part of Talk to a Teacher project,  
 
|Spoken Tutorials are part of Talk to a Teacher project,  
  
 
|-
 
|-
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| 11:18
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| 11:13
 
|It is supported by the National Mission on Education through ICT, MHRD, Government of India.  
 
|It is supported by the National Mission on Education through ICT, MHRD, Government of India.  
  
 
|-
 
|-
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| 11:24
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| 11:18
 
|More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro
 
|More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro
  
 
|-
 
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| 11:29
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| 11:23
 
|  This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining
 
|  This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining
  
 
|}
 
|}

Revision as of 16:33, 23 October 2015

Time Narration
00:01 Hello and welcome to the spoken tutorial on Creating Curved geometry in OpenFOAM
00:06 In this tutorial I will show you
00:09 Steps for creating a curved geometry in openfoam
00:14 Viewing the results in paraview
00:17 To record this tutorial
00:19 I am using Linux Operating system Ubuntu version 10.04. OpenFOAM version 2.1.0
00:28 ParaView version 3.12.0
00:32 We will create a geometry for flow over cylinder.
00:36 Note that I am using this case just for explanation.
00:41 The cylinder is in a form of a semi circle.
00:45 Meshing is a body fitted grid.
00:49 The entire geometry is divided into blocks.


00:54 We break the semi circle into equal number of parts.
00:58 Now minimise this
01:03 Open a blockMeshDict file of the previous tutorial
01:08 I have already opened it
01:12 Scroll down, for simple geometries you can see that edges is kept empty
01:20 Now Create a new blockMeshDict file
01:23 To do this let us minimise this first
01:27 Now Right click > create document > empty file
01:34 Name this as blockMeshDict.
01:40 Note that M and D here are capital
01:46 Open this
01:51 Now you can copy the initial few lines from the lid driven cavity upto convertTometers
01:58 Go up copy this upto convertToMeters
02:04 Copy this and paste it in the new blockMeshDict file
02:12 Now change the convert to meters from point one to one
02:18 As our geometry is in meters we will keep this as one
02:24 Now press enter , press enter again
02:28 After this you need to enter the co-ordinates of the geometry in vertices
02:35 Let me switch back to the slide. Note that the points should be ordered in such a way starting from 0,1,2,3, 4 and so on. as shown in the figure
02:47 Minimise the slide. Now type vertices in the blockMeshDict file and press Enter
02:56 Insert the open bracket and Press Enter
03:00 Now enter the co-ordinates of a geometry as shown in the diagram.
03:05 Let me switch back to the slides
03:08 For explanation I will use right half of the semi-circle
03:12 Enter the values for the points in the figure starting from 0
03:16 Let me switch back to the blockMeshDict file
03:20 leave some space and enter the co-ordinates of point 0
03:27 Open close bracket enter 0.5 (space) 0 (space) 0. Press Enter
03:36 Again leave some space , open close bracket
03:39 Enter co-ordinates for point 1 (space) 0 (space) 0. Press enter
03:45 Now leave two vertical spaces , again press Enter, again press Enter
03:51 leave some space and enter the co-ordinate for point number 4
03:57 Open, close bracket, enter 0.707 (space) 0.707 (space) 0
04:05 Press Enter. Leave some space
04:09 Open, close bracket
04:10 Enter the co-ordinates for the point 5
04:13 Enter 0.353 (space) 0.353 (space) 0, press Enter
04:22 Now leave 4 vertical spaces and enter co-ordinates for point number 9
04:27 1 2 3 4 , again press Enter, leave some space
04:34 Open, close bracket
04:36 Enter 0 (space) 1 (space) 0, press Enter
04:42 Leave some space
04:44 Enter co-ordinates for point number 10
04:46 Open close bracket 0 (space) 0.5 (space) 0 and press Enter
04:54 Similarly enter the co-ordinates for the remaining points in the geometry.
05:00 Insert a close bracket put a semi-colon and press Enter
05:05 Again press Enter
05:06 Now type blocks, press enter
05:13 Insert a open bracket press enter
05:16 Let me switch back to the slides
05:20 TheBlock numbers are circled as shown in the figure
05:24 Now let me switch back to the blockMeshDict file
05:28 Leave some space
05:30 Now enter the type of block i.e. Hex leave some space
05:37 Now enter the points for the blocks
05:41 Open, close brackets
05:43 Leave some space, the simple grading can be kept as (1 1 1) and press enter
05:55 For creating the blocks please refer to the tutorial on creating simple geometry in OpenFOAM
06:02 Note that there will be more number of blocks in this example
06:07 Now insert a close bracket
06:10 Insert a semi-colon, and press Enter. Again press Enter
06:16 In the next line type edges and press Enter
06:22 insert a open bracket and press Enter
06:26 Here you need to enter the points which are the end points of the arcs
06:31 Leave some space and type arc leave some space type the points which are the end points of the arc
06:40 Let me switch back to the slide. Now insert the end points of the arc
06:46 In this we get, we start with arc 0 5
06:52 Let me switch back to the blockMeshDict file
06:56 Enter 0 space 5
06:59 Leave some space insert open, close bracket
07:04 In the bracket enter the co-ordinate of any intermediate point in between the two arc points.
07:11 Now let me switch back again to slides
07:14 In the figure you can see that you have to pick up a point in between the two end points of the arc.
07:23 In this geometry I have picked up right half of the circle
07:28 Using simple geometric relations you can find the co-ordinates of the intermediate point as shown in the semi-circle
07:38 Similarly you can repeat the procedure for rest of the semi-circle geometry
07:45 Now let me switch back to the blockMeshDict file
07:48 press Enter
07:50 Note that there are more number of arcs in this example
07:55 Insert a close bracket
07:58 Insert a semi -colon press Enter again press Enter
08:02 Now enter the boundary patches after arcs
08:06 Refer to the tutorial on Simple geometry in OpenFOAM, for entering the boundary patches
08:12 Enter boundary,press Enter
08:15 Insert open bracket press Enter. Insert close bracket semi-colon press Enter
08:21 Again press Enter
08:24 Now In the next line type mergePatchPairs
08:29 Note that P here is capital
08:31 Press Enter
08:33 Insert a open bracket, press Enter
08:36 Since there are no patches to be merged this can be kept empty
08:40 Insert a close bracket
08:42 Insert a semi -colon and press Enter
08:46 Let me switch back to the slides
08:49 Similarly enter the co-ordinate points for the points in the front face of unit thickness of the geometry as shown in the figure
08:57 Now open a Command terminal
09:00 In the command terminal type the path for your case file
09:04 I have already set the path for the tutorial case of flow over cylinder
09:10 In the terminal type blockMesh for meshing the geometry and press enter
09:18 Meshing is done
09:20 Now type paraFoam in the terminal and press enter to view the geometry
09:26 Let me drag this to the capture area
09:30 Now on left-hand side of object inspector menu click Apply
09:36 geometry will be created as seen in the paraview window
09:41 Scroll down the Object inspector menu
09:44 Check or uncheck the Mesh field box
09:49 You can see different regions of the geometry.
09:53 You can also see the wire frame of the geometry
09:56 On top of the active variable control menu, in the drop down menu change from Surface to wireframe
10:05 You can see the wireframe model of the geometry
10:11 Close this. Let me switch back to the slides
10:16 In this tutorial we learnt:
10:17 How to create a curved geometry.
10:20 How to enter points for edges in OpenFOAM
10:24 This brings us to the end of the tutorial
10:28 As an Assignment
10:29 Create a geometry with inner semi-circle of radius 2 meters and outer semi- circle of radius 4 meters and View the geometry in paraview
10:42 Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
10:45 It summarizes the Spoken Tutorial project.
10:48 If you do not have good bandwidth, you can download and watch it.
10:53 The Spoken Tutorial Project Team
10:56 Conducts workshops using spoken tutorials
10:58 Gives certificates to those who pass an online test
11:02 For more details, please write to contact@spoken-tutorial.com
11:09 Spoken Tutorials are part of Talk to a Teacher project,
11:13 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
11:18 More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro
11:23 This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining

Contributors and Content Editors

DeepaVedartham, Gaurav, PoojaMoolya, Sandhya.np14, Sneha

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