OpenFOAM/C3/Creating-and-meshing-a-curved-pipe-geometry-in-Salome-for-OpenFOAM/English

Tutorial: Creating and meshing a Curved-Pipe Geometry in Salome for OpenFOAM.

Script and Narration : Saurabh S. Sawant

Keywords: Video tutorial,CFD.

Visual Cue	Narration
Slide 1: Title Play the slide	Hello and welcome to the spoken tutorial on Creating and meshing a Curved-Pipe Geometry in Salome for OpenFOAM.
Slide 2 : Learning Objectives Play the slide	In this tutorial we will see: To create curved pipe geometry in Salome. To mesh the geometry in the Salome. To modify the mesh using submesh.
Slide 3: System Requirement Play the slide	To record this tutorial, I am using Linux operating system Ubuntu 12.10 and Salome version 6.6.0
Slide 4:Prerequisites Play the slide	To practice this tutorial the learner should have Salome installed on his computer, if not, you may refer to the tutorial on, Downloading and Installing Salome.
Open Salome software by clicking on the Salome icon on the desktop.	Open Salome software by clicking on the Salome icon on the desktop.
Click on the Geometry module in the Modules bar.	Click on the Geometry module in the Modules bar.
Click on New.	Click on New.
Click on 'New Entity' in the top menu bar.	Let's click on 'New Entity' in the top menu bar.
In the drop down options, go to basic and then 2d sketch.	In the drop down options, go to basic and then 2d sketch.
Press Apply.	First Point is at zero zero, by default. Press Apply.
Go to second element type, Arcs.	Now, Go to second element type, Arcs.
Select the Type as Direction and Direction as Tangent.	Select the Type as Direction and Direction as Tangent.
Type the Radius -10 and tbe Angle as 90. Press Apply.	Type the Radius -10 and tbe Angle as 90. Press Apply.
Select the first element type, Lines.	Then select the first element type, Lines.
Select the Type as Direction and Direction as Tangent.	Select the Type as Direction and Direction as Tangent.
In front of length, type 30.	In front of length, type 30.
Press Apply and then Close.	Press Apply and then Close.
Zoom in	Let me zoom in for the close view.
Open the Geometry tree in the Object Browser.	Open the Geometry tree in the Object Browser. We can see sketch_1.
Check off to hide the sketch and check on to see it back.	You can check off to hide the sketch or check on to see it back.
Go to New Entity>>Blocks>> Divided Disk.	Now, Go to New Entity>>Blocks>> Divided Disk.
Select the orientation as OZX and type the radius equal to 1.	Select the orientation as OZX and type the radius equal to 1.
Click on 'Apply and Close'.	Click on 'Apply and Close'.
Go to New Entity>> Generation>> Extrusion Along Path.	Now, go to New Entity>> Generation>> Extrusion Along Path.
Select the Base Object as Divided Disk_1 and Path Object as Sketch_1 from geometry tree.	Select the Base Object as Divided Disk_1 and Path Object as Sketch_1 from geometry tree.
Press Apply and Close.	Press Apply and Close. Pipe_1 object has been created in the geometry tree.
Go to New Entity>>Explode.	Go to New Entity>>Explode.
Select the Main Object as Pipe_1.	Select the Main Object as Pipe_1.
In the Sub-shapes Type drop down menu, select Face.	In the Sub-shapes Type drop down menu, select Face.
Check on Select sub-shapes.	Check on Select sub-shapes.
Zoom in by scrolling up.	Let me zoom in by scrolling up.
	I can rotate the object by clicking on this rotation menu.
Hold the left mouse button and move the mouse upward to rotate the object.	Hold the left mouse button and move the mouse upward to rotate the object.
Take the mouse pointer near the inlet face.	Take the mouse pointer as shown on the screen.
Hold the left mouse button.	Hold the left mouse button.
Drag the mouse so that all the inlet faces fall into the rectangular area.	Drag the mouse so that all the inlet faces fall into the rectangular area.
Release the mouse button.	Release the mouse button.
Click on Show only selected button.	Click on Show only selected button to ensure that all the inlet faces have been selected.
Click on Apply and Close.	Click on Apply and Close. We see five faces are created in the geometry tree.
Click on New Entity>>Group>>Create.	Now, click on New Entity>>Group>>Create.
Select the main shape as Pipe_1 from the geometry tree.	Select the main shape as Pipe_1 from the geometry tree.
Select the third Shape Type, Faces.	Select the third Shape Type, Faces.
Select the newly created five faces from the geometry tree. Add them by clicking on Add button.	Then select the newly created five faces from the geometry tree. Add them by clicking on Add button.
Name the group as 'inlet'.	Name the group as 'inlet'.
Press Apply and close.	Press Apply and close. We see inlet group has been created.
Follow the similar procedure on the other end of the pipe and group those faces as outlet.	Follow the similar procedure on the other end of the pipe and group those faces as outlet.
	I have created the outlet group.
In the modules drop down menu select Mesh.	Now, in the modules drop down menu select Mesh.
In the top menu bar, click on Create Mesh.	Now, in the top menu bar, click on Create Mesh.
Select the Geometry as Pipe_1 from the geometry tree.	Select the Geometry as Pipe_1 from the geometry tree.
Click on 'Assign a set of hypotheses' and select '3D: Automatic Hexahedralization'.	Click on 'Assign a set of hypotheses' and select '3D: Automatic Hexahedralization'.
Select the Number of Segments 12.	Select the Number of Segments 12.
Click on OK.	Click on OK.
Click on Apply and Close.	Click on Apply and Close. We see Mesh_1 in the geometry tree.
Right click on Mesh_1 and click on Compute.	Right click on Mesh_1 and click on Compute.
	We see Mesh has been created.
Zoom in	Let me Zoom in.
Move the object by this panning option.	You can move the object by this panning option.
Refine the mesh in the flow direction.	Now we will refine the mesh in the flow direction.
Go back to the geometry module from modules drop down menu.	To do so go back to the geometry module from modules drop down menu.
Get the proper view by using panning and rotation option.	Now, let me get the proper view by using panning and rotation option.
Go to New Entity>> Explode.	Go to New Entity>> Explode.
Select the main object as Pipe_1.	Select the main object as Pipe_1.
Select sub-shapes Type, Edge.	Sub-shapes Type, Edge.
Check on Select sub-shapes.	Check on Select sub-shapes.
Move the window to the corner.	Let me move the window to the corner.
Take the mouse pointer near to the inlet.	Now, take the mouse pointer as shown on the screen.
Hold the left mouse button.	Hold the left mouse button.
Drag the mouse so that all the outlet edges fall inside the rectangular window.	Drag the mouse so that all the outlet edges fall inside the rectangular window.
Release left mouse button.	Release left mouse button.
	The selected edges would appear in white color.
Click on hide selected in the Sub-shape selection window.	Then, click on hide selected in the Sub-shape selection window.
Similarly, hide other 3 face edges.	Similarly, there are 3 more face edges that we need to select one by one and hide.
	After that, you would only see the edges in the flow direction.
Select all of these edges using similar method and click on Apply and Close.	Select all of these edges using similar method and click on Apply and Close.
	In the geometry tree below outlet we see 24 edges have been exploded.
Go to New Entity>>Group>>Create.	To group these edges go to New Entity>>Group>>Create.
Select the Shape Type as Edge.	Select the Shape Type as Edge.
Select the Main Shape as Pipe_1 from the geometry tree.	Select the Main Shape as Pipe_1 from the geometry tree.
Select all of these exploded edges.	Now, select all of these exploded edges.
Add them by clicking on Add button.	Then, add them by clicking on Add button.
Name it as flowedges.	Name it as flowedges.
Click on Apply and close.	Click on Apply and close.
	We see, flowedges group has been created.
Go to Mesh module from modules drop down option.	Go to Mesh module from modules drop down option.
Right click on Mesh_1 and click on Create Sub-mesh.	Right click on Mesh_1 and click on Create Sub-mesh.
Select the geometry as flowedges.	Select the geometry as flowedges.
Select the algorithm, wire discretization.	Select the algorithm, wire discretization.
Click on first button to the right of the drop down menu.	Now, to select the appropriate hypothesis click on first button to the right of the drop down menu.
Click on, Nb. Segments.	Click on, Nb. Segments.
Type the number of segment as 30.	Type the number of segment as 30.
Click on Ok.	Click on Ok.
Click on Apply and Close.	Click on Apply and Close.
Click on Mesh_1 and click on Compute.	Now, click on Mesh_1 and click on Compute. Refined mesh has been created.
Close the window.	Close the window.
	We see mesh has been refined in the flow direction.
Go to File>> Save As	To save this work, Go to File>> Save As
Name the file as Curved-geometry.	Name the file as Curved-geometry.
Save the work on the Desktop.	I am saving the work on the Desktop.
Close Salome.	Close Salome.
Point to the file Curved-geometry.hdf on the desktop.	We see file has been saved as Curved-geometry.hdf.
Slide 11: Summary	In this tutorial we have learned: To create curved pipe geometry in Salome. To mesh the geometry in Salome. To modify the mesh using submesh.
Slide 12 : Assignment	For Assignment, Create a pipe having inner diameter 6 units smaller than the outer diameter. Change the angle of the bent.
Slide 13 : About Spoken tutorials	The video is available at the following URL: http://spoken-tutorial.org/What_is_a_Spoken_Tutorial It summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it.
Slide 14: About Spoken tutorials	The Spoken Tutorial Project Team -Conducts workshops using spoken tutorials -Gives certificates to those who pass an online test -For more details, contact@spoken-tutorial.org
Slide 15: Acknowledgement	Spoken Tutorials are part of Talk to a Teacher project, It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by http://spoken-tutorial More information on this mission is available at, http://spoken-tutorial.org/NMEICT-Intro
	I am Saurabh Sawant from IIT Bombay, Thank you.

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