Week 3 Challenge : CFD meshing on Turbocharger

AIM: The main objective of this challange is perform volumetric mesh with the given target length as per PIDs.

PROCEDURE:

Open the model in the ansa software.

Now the turbo charger is under the geometry checks,at the end of the checks we came to know the single cons and triple cons.

IN the turbo charger model there are some overlap surfaces are present and that represented in the glicthes.

that extra overlap surfaces are removed by the help of the delete and the crosshatches of that paticular pid.

now,come back to the single and triple cons,in order to rectifie that need to make some new surfaces by the help of the fitted,coons,fillhole,etc.

In turbo casing the all the new faces options not that much efficient so need to insert some hot points in the surface of the turbo casing which is in the white colour pid.

for insert the hotpoints use the parametric options and select the hotpoint as a reference and give the length in the parametric deck as 0.5mm.

Repeat this for serveral times to make hot points at the both end of the turbo casing ,and now make the new small small facesby the help of this hot points.

The new faces is generated by the help of topo mode-new faces-fitted. in this fitted by using ent an touch the cons and create the surfaces.

ENSURE that the new surface is not overlap with the any other surfaces and not overlap with below surfaces.

in fitted mode frist surface generation in overlap,by using alt option in the faces created and use of the preview of the new surface ,it helps to create a accurate faces which is recommended  in that respective places.

in the compresser casing there is a single con which is not easily deleted,so use of the intersected option which is presented in topo mode.

so by the help of the decks the topo cleanup is sucessfully done.

MESHING;

after completing the topo cleanup by the help of the topo deck, now the meshing process will be begin.

As per the target length which is given in the question all the parts in the turbocharger is meshed.

as per the name given in the question ,the same name is given to respective pid also.

now the actual meshing process is begin :

in the question(turbo casing,compresser casing,inlet casing cover)all this things are in same meshing target length.

so except these parts ,rest of all parts are turn off by the help of the pid light.

now use the quality ctiteria make the target length as the 5mm and minimum target length as a 4mm and maximum target length as 6mm.

in mesh deck the perimeter -length- perimeter-select  the pid regions (turbo casing,compresser casing,inlet casing cover)and do the same for macros.

now by the help of the mesh generation -spot mesh and make it visible.

now the 5mm meshing parts in the turbo charger model is meshed completely. 

now start the meshing the parts which is 1mm target length of the turbo charger model.

the 1mm meshing parts are(blade stage-1,blade stage-2,shaft rotor).

now the quality criteria is change as the target length as 1mm and minimum length as 0.5 mm and maximum target length as 2 mm.

further by using the mesh deck-perimeter-length-perimeter-select the parts which is 1mm to be meshed.and give the length as 1mm.and do the same for the macros .

mesh generation -spot mesh-visible by using this command the 1mm meshing was done.

now the last and rest of the part which is impeller blade which is 2mm meshing target length which is given in the question.

change the quality criteria as target length 2mm and theminimum length as 1mm and max.length as 3mm. and give ok.

the perimeter length and select perimeter and pick the impeller and do the same for macros.

further the mesh generation -spot mesh-visible-make the mesh as 2mm for the impeller as per the given .

hence the overall surface mesh of the turbo charger model is completely meshed.as per the conditions given in the question.

VOLUMETRIC MESHING:

after completing the surface meshing the nextn stage of the question is vaolumertic meshing.

before do volumetric mesh have to check all surfaces are meshed and closed fully.

now go to volume-define-wholedb-make a find of closed volumes.

now select the overall things and do the remesh and wait for some time and the volumetric meshing of the turbo charger model was sucessfully meshed.

hence,the fully volumetric meshed is,

RESULTS AND CONCULSION;

Finally the turbo charger model is performed under the topo cleanup and surface mesh and volumetric mesh.

As per the given conditions in the question .so the model of the turbo charger is properly meshed and performed correctly as per shown in the video.