Difference between revisions of "OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/Gujarati"
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| − | | | + | | અને '''paraview''' માં પરિણામોને જોવું. |
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Revision as of 11:32, 18 November 2015
| Time | Narration |
| 00:01 | OpenFOAM માં વક્ર જોમેટ્રી બનવાના આ સ્પોકન ટ્યુટોરીયલમાં સ્વાગત છે. |
| 00:06 | આ ટ્યુટોરીયલમાં હું તમને બતાડીશ. |
| 00:09 | openfoam માં વક્ર જોમેટ્રી બનાવવાના સ્ટેપ. |
| 00:14 | અને paraview માં પરિણામોને જોવું. |
| 00:17 | આ ટ્યુટોરીયલ રિકોર્ડ કરવા માટે, હું વાપરી રહ્યી છું, |
| 00:19 | Linux Operating system Ubuntu આવૃત્તિ 10.04. OpenFOAM આવૃત્તિ 2.1.0 |
| 00:28 | ParaView આવૃત્તિ 3.12.0 |
| 00:32 | We will create a geometry for cylinder. આપણે cylinder પર ફલો ના માટે જોમેટ્રી બનાવીશું. |
| 00:36 | નોંધ લો કે હું આ કેસ ફક્ત સમજુતી માટે ઉપયોગ કરી રહી છું. |
| 00:41 | The cylinder એ અર્ધ વર્તુળ ના ફોમ માં છે. |
| 00:45 | નોંધ લો Meshing એ ઢાંચાથી ફીટ થયેલ ગ્રીડ છે. |
| 00:49 | નોંધ દો કે સંપૂર્ણ જોમેટ્રી ને બ્લોકસમાં વિભાજિત કરવા માં આવ્યું છે.
|
| 00:54 | આપણે અર્ધ વર્તુળ ને સમાન ભાગોમાં વિભાજીત કરીએ છીએ. |
| 00:58 | ચાલો આને મીનીમાઇઝ કરીએ. |
| 01:03 | પાછલા ટ્યુટોરીયલની blockMeshDict ફાઈલ ખોલો. |
| 01:08 | મેં તે પહેલાથી જ ખોલોયું છે. |
| 01:12 | સ્ક્રોલ કરો તમે જોઈ શકો છો સરળ જોમેટ્રી માટે edges ને ખાલી રાખવા માં આવ્યું છે. |
| 01:20 | હવે નવી blockMeshDict ફાઈલ ખોલો. |
| 01:23 | આ કરવા માટે પ્રથમ આને મીનીમાઇઝ કરો |
| 01:27 | હવે જમણું ક્લિક > create document > empty file |
| 01:34 | આને blockMeshDict તરીકે નામ આપો. |
| 01:40 | નોધ લો કે M અને D અહી કેપિટલ માં છે. |
| 01:46 | આ ખોલો. |
| 01:51 | હવે તમે શરૂઆતની અમુક લાઈનો lid driven cavity થી convertTometers સુધી કોપી કરી શકો છો. |
| 01:58 | ઉપર જાવ convertToMeters સુધી આને કોપી કરો. |
| 02:04 | આને કોપી કરો અને blockMeshDict ફાઈલમાં તેને પેસ્ટ કરો. |
| 02:12 | હવે convert to meters ને point one થી one સુધી બદલીએ. |
| 02:18 | જેમકે આપણી જોમેટ્રી મીટરસ માં છે આપણે આને એક રાખીશું. |
| 02:24 | હવે enter દબાવો ફરીથી enter દબાવો. |
| 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 figure, 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 |
| 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 |
