Week 4 Challenge : CFD Meshing for BMW car

●Aim:

check and solve all geometrical errors on half portion and Assign appropriate PIDs. Perform meshing with the given Target length and element Quality criteria. After meshing the half model, Do symmetry to the other side.

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

●Procedures and Results:

Geometry Cleanup

Step1: Checking the resolution and set it to 1

Step2: Cutting half of the geometry using universal delete

Step3:

Geometric clearence of Grills

1.

2.

3.

Step 4: Geometric clearence of lights

Step 5 Geometric clearence of logo

Step 6: Geometric clearence of indicator light

Step 7: Geometric clearence of Mirror

Step 8: Geometric clearence of floor

Step 9: Geometric clearence of rims

Step 9: Geometric clearence of tyres

Step 9: Assigning PID's

Step 10: Meshing elements in freezing condition(Auto CFD)

Surface Meshing

Step 11: Mesh genaration using Auto CFD mesh generation (Defreezing)

Step 12: Creating the Wind Tunnels considering the measurements.

Taking, x= 1310mm, Bottom Distance =500mm

Step 13: Mesh generation of the Wind Tunnels using Auto CFD and growing mesh for the side faces

Step 14: Assigning PID's of the Wind Tunnels

●CONCLUSION

•This model has been attached with the necessary surface meshing and volume meshing criteria

•This challenge is exposed to the process of volume meshing and using elements such as Growing mesh Analysis

•This challenge helped us to explore different methods of geometry cleanup

•This challenge helped to deal with penetration errors, intersection errors and warnings

This challenge helped us to explore different tools of ANSA, such aas coons2curve, improve the shell mesh.

•This challenge helped us to learn about creating a wind Tunnel considering the measurements

Google drive link of the File:

https://drive.google.com/file/d/1KW6aCEqLJm1Tu5FbSZAWzp9UqyDxSY4v/view?usp=sharing