Week 3 Challenge : CFD meshing on Turbocharger
AIM:TO PERFORM THE VOLUMETRIC MESHING ON THE TURBOCHARGER i.e. ONLY IN THE INTERNAL REGIONS F0R THE INTERNAL ANALYSIS
PROCEDURE:
Intially i taken the model in the topo deck and then geometrical cleanups have been done and then went to checks manager and geometrical checks and alsochecked then execute and found any errors related to geometry and also went for penetragtion and intersection issues are there and then came back and to resolve mostly there are penetration issues to visualisize them in abest way i switched from Ent mode to PID mode then deleted all the penetrationg surfaces on the external redion by using the delete option available in the top bar and to do it firstly i selected the face and did not option so that it gets dehighligted and went for invert option to reappear only the highlighed model then deleted it using the delete option by selecting the entire model and middle mouse thats the penetrated surface and then closed all the opening to make it a water tight geometry and ensured no triple and single cons but left triple cons if there is a justification for the presence and also generated a surface region in the impeller region which is actually missing by going to the transform option and then symmetry and then selecting the three coordinate plane and selected three coordinates and inserted a hot point in the middle portion as there is no hotpoint then selected the region to be replicated and the 3 coordinates by thich it has replicate then click on middle mouse and then its done again went for geometrical checks and found errors again but this time they are on internal regions in the shaft region and also some intersectional in the top region resolved them and went to the internal shaft region and deleted all the unnecessary faces which are making to form triple cons on the shaft and also deleted the penetration faces and a part of the shaft not getting coincided with the impeller then i went to the project option and selected the region which has to coincided with the impeller region and then clicked on middle mouse and then it asked me for on which face it has to be projected i selected the face of impeller and middle mouse done it has coincided and deleted the internal region of shaft connecting the impeller.now it went to checks manager and geometry checks and then executed again this i found no errors and penetration issues and then went to pid manager to assign pids then clicked on new and shell property given names as
- Blade stages
- Impeller
- Shaft rotor
- Turbo casing
- Compressor casing
- Inlet casing cover
some are given just by renaming the default shell property to required label and after assigning pids to every part went to the compess option to delete the extra assignment if any region or surface is assigned with pid more than those will be will be deleted and there are only 6 pids and they are of above and then i went to mesh deck to perform spot mesh .firstly went to the pid manager and selected the part to be meshed i dehighlighted all the parts except to be meshed and then went perimeters tab and then selected length option and then perimeters and then selected the model available and middle mouse and a new tab appeared to give element length of meshing and given accordingly to problem specified and then clicked macros and selcted the model and similarly given elemental length in the new appeared i mean target length then went to the mesh generartion and then spot mesh and then visible and spot mesh has been generated and then went to the freeze/un option to freeze the meshed model but before doing this went to the mesh parameters and then given minimum target length as specifies in problem and maximum as spectified as 100 and elemental type as tria and clicked onv ok and similarly enabled minimum length in the quality criteria and given as spectified in the problem and this changes are made every time we mesh new part of model i mean when target length gets changed they have to updated accordingly.After meshing for all the parts are done entire model appears in blue color as it is freezed and after this go to volume deck and then click on volumes and then define and small new tab appears we have to click on whole db to select all the regions and then ok then auto volume will be detected then if we click on them they show for which part of volume it is and delete soid volume which be detected entirely in one entity becauuse we need on internal volume meshafter deleting it click on ok to generate internal volume . we even view them in the topo mode as well once it gets generated .
RESULT:
internal volume mesh for turbocharger has been generated