Clean up & Meshing the Turbo charger unit using ANSA - PART - 2
Contiuned from PROJECT PAGE 1...
In last PROJECT PAGE we have compelted the Surface meshing.
Now we will start with the Volumetric meshing.
114. Now select ALL option. Now we will perform the mesh operation for the volumes, now we will create the volume for the region where the geometry is open. Now we will go to TOPO module. First we close the Compressor casing top using NEW under FACES option. Select FITTED option and select the middle circle double cons and press middle mouse button to confirm and press OK.
115. Next we close the Compressor casing Bottom using NEW under FACES option. Select FITTED option and select the surface and press middle mouse button to confirm and press OK.
116. Now we set the PID for the surface which we created.
- Go to SET PID select the top surface of the Compressor casing and press middle mouse button for confirmation and go to NEW option select PSHELL and assign Compressor casing Inlet.
- Go to SET PID select the Bottom surface of the Compressor casing and press middle mouse button for confirmation and go to NEW option select PSHELL and assign Compressor casing Outlet.
117. Now create the surface for the Turbo casing Inlet area and outlet area.
- Go to NEW under FACES select FITTED option select the bottom surface and press middle mouse button to confirmation and press OK.
- Go to NEW under FACES select FITTED option select the side surface and press middle mouse button to confirmation and press OK.
118. Now we set the PID for the surface which we created.
- Go to SET PID select the side surface of the turbo casing and press middle mouse button for confirmation and go to NEW option select PSHELL and assign Compressor casing Outlet and press OK.
- Go to SET PID select the Bottom surface of the Turbo casing and press middle mouse button for confirmation and go to NEW option select PSHELL and assign Compressor casing Inlet and press OK.
119. Now create the surface for the bottom of the Turbo casing Inlet area.
- Go to NEW under FACES select COONS option select the surface in ENT mode and press middle mouse button to confirmation and press OK.
- Similarly do the above step for other 3 area.
120. Now we set the PID for the surface which we created. Go to PROPERTY mode or press CTRL+P and select the compressor casing Inlet property and right click on the property and select APPLY
and select all the 4 surfaces which was create in previous step. After confirming the color will be same as compressor casing inlet and press OK.
121. Now go to MESH module and now we can see that the surfaces which we create are unmeshed. So right click on the UNMESH area and select Show only. The surfaces which are not meshed are shown.
122. Now go to MESH GENERATION and select FREE MESH and select all surface and press middle mouse button for confirmation.
123. Now select ALL option now we can see there are no unmeshed surfaces.
124. Now we will do the volume meshing. Go to VOLUME mesh module and select DEFINE and press OK when dialog box occurs.
125. Now we can see the volume list.
126. Now we will delete the unwanted surface and we will keep only the volumes. So select the ID 2,4,5&6. As we are doing volumetric mesh so we do not required the open surfaces rather we need closed volume so we are deleting those surfaces. So select those area and press right click and select delete option and press OK when a dialog box occurs.
127. Now select the remaining surfaces and right cick select SHOW only. Now we can see only the volumes which where present inside the outer surface which we deleted in the previous step. Then close the Volume List dialog box.
128. Now we do the volumetric mesh using TETRA CFD under Unstructural Mesh module. Select the entire model and press middle mouse button to confirm. It will take few minute to mesh as we are doing meshing for volumes and also it is more complex computational process as it has to mesh the inner volume so it takes more time. As also we can see Volume unmesh : 4 in the left side of the ANSA window
129. Now we can see the entire volume has been meshed.
130. Select !- (I NOT OPERATOR) and select ENT mode and select the small portion of the geometry to confirm the meshing is done properly or not at the inner volume. We can see the Blade stage 2 blades are visible through line marks. By this the volumetric meshing is done properly.
G:Learning Outcome:
Learnt few options which helped to clean the geometry and can mesh properly. And also learnt how to do the volumetric meshing.
F: Conclusion:
For important functional area the mesh length should be less for proper results. In order to do volumetric meshing delete the outer surfaces and create a proper volume for meshing.Total we have 9832973 Tetras meshes on the model.
Meshing of Turbo charger with proper meshing near intersection.
https://drive.google.com/file/d/1v9-hYFVEWvBKA8NYtp_i3ocU-QrBfGGV/view?usp=sharing
Meshing of Turbo charger with Volumetric meshing.
https://drive.google.com/file/d/1v9-hYFVEWvBKA8NYtp_i3ocU-QrBfGGV/view?usp=sharing