Challenge

Week 4 Challenge : CFD Meshing for BMW car

Aim

Procedure

Open the BMW car model using ansa.
Check the Geometry of the model and single & Double cons present or not .
The BMW car is symmetric.So i did half model only enough the Topo cleanup.
Model is took position of the top view and Deleted the half model .
Again check the geometry of the half model.
More single cons and Triple cons are presented,So i started topo cleanup.
If where the present single cons and then create the new faces through the "NEW" option.
Single cons are changed to Double cons.
Single cons are present Grills,Light faces,Body,mirror faces etc..
Next step Triple cons are checking where is presented.
Unwanted faces present the BMW car and using the DELETE option deleted.
Grills and Mirror some extra faces deleted.
Cut option used to cutting to faces.It's helps to unwanted faces deleting the model.
Mirrors,Window,Logo more faces are present at the triple cons.
Using the "DELELTE" option above the Triple cons deleted.
The model cons are release through "RELEASE"option and Topo Option click the model cons are joined.
It's helps to avoid some single cons.
After again checking for geometry any single & Double cons present or not,
If not present any errors then start the meshing.

PID

After topo cleanup set the PID each part of the model. It is helps to identify the specific model.

Meshing

Check the BMW car parts mesh length for given question.
Mirror=2mm for check the quality criteria and mesh parameters give the maximum and minimum length. Model give the tria ,perimeter &Macros give the 2mm and spot meshing option.
Finally meshed the mirror.
Lights and Grills target length is 4mm,1mm followed by above process.
Rims and Tyres are target length is 2mm.
Windows and Silencer,logo for 2mm,3mm and 1mm target length present.
Finally the body of the car start the meshing and check the quality criteria and mesh parameters.
After meshing model will mirror the other side.
Using Transform option copy of the whole model and give alternate 3 points xyz direction.
Finally got the whole BMW car is meshed.

Wind tunnel

First we are measuring length of the car multiply 6 and 4 for create the upper and side faces of the wind tunnel.
Points Relative option create a points to the three faces.
Using "CURVES" connects the all points.
Create the new faces.
Finally created the Wind tunnel.

Volumetric mesh

Result

To verified the BMW car meshing through the BETA ANSA software.

BMW CAR complete geometry file link

Ship work like this
in your own course.