Week 4 Challenge : CFD Meshing for BMW car

CFD Meshing for BMW car

Aim:To perform surface mesh to Wind tunnel surfaces for BMW car.

Objectives:

1. To check and solve all geometrical errors on half portion and Assign appropriate PIDs.
2. To perform meshing with the given Target length and element Quality criteria.
3. To do symmetry to the other side after meshing the half model .

Procedures:

• Check and solve all geometrical errors

• open the given model in Ansa
• devide the geomtry in half
• perform topo clean up and geometry check
• remove single con,triple con

GEOMETRY SETUP:- In geometrysetup each and every part we have delete the unwanted surfaces. we have used lot of options project,cut,new,paste, hotpoints and symmetric.

BMW CAR GEOMETRY OUTPUTS:-

2. MESHING OF BMW CAR INDIVIDUAL PARTS:-

1. Target lengths for the different parts of a model are as follow:
2. Body - 3 mm
3. Lights - 4 mm
4. Grills - 1 mm
5. Rims and Tyres - 2 mm
6. Optical Rear view mirror - 2 mm
7. Window - 2 mm
8. Silencer - 3 mm
9. Logo - 1 mm

3. WIND TUNNEL OF BMW CAR:-

MESHING OF WIND TUNNEL:-

CONCLUSIONS:-

1. In this we have rectified the all geomertical errors.

2. we have given the lengths of individual parts for the meshing purpose.

3. each and every we have given the mesh as per target lenths.

4. In BMW CAR the total trais are 1072251. In this we have used the trais method.

5. After meshing we have cover the wiind tunnel.

6. we have created the top, bottom, side, and bottom

7. After that we have meshed the all surfaces of the wind tunnel.

8. In wind tunnel the total trias are 1123163.