Week 4 Challenge : CFD Meshing for BMW car

CFD Meshing for BMW car

Aim:
For the given model, 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.

Objective:

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

Procedure:
Topo/geometry clean-up:
Upload the ANSA file onto the screen to perform topo/clean and meshing in the later stages.
Go to mesh and choose the length and enter 1 mm under perimeters to smoothen the sharp curves of the car and give it a fine look

Since the car is symmetric from the middle to an end, we can delete one side of the car and perform the necessary operations on the car and use the symmetry option to produce the complete car.

We can now start with the topo clean-up by removing the single and unnecessary triple cons. First click on topo and box select the entire to identify or joins any unjoined single cons or triple cons so that we can identify the required clean-up accordingly

after all topology setting naming pids

Meshing

Make symmetric

https://drive.google.com/file/d/1j4EDH_dbUa4a--AyFfK81VZd9vqYtES_/view?usp=sharing

For car meshing

-Surafce meshing of wind tunnel:

We need to apply surface meshing depending on the mesh length near the car and regions far away from it.
Therefore we need to apply different mesh lengths at the bottom and top wind tunnel surfaces.
We need to use the spacing option to have a mesh length varying from a small mesh length size to a larger mesh length.
Surface meshing can be achieved by doing this accordingly

https://drive.google.com/file/d/1l8lulNs539iutUOIGxCgl23tEVx2xc41/view?usp=sharing

for car and wind tunnel.

Conclusions:
BMW car model is topo-cleaned and surface meshed appropriately.
The wind tunnel is created and the surface meshed with reference to the car model size. Different volumes of the car model is created since the silencer and tires are not connected to the car body.
Single volume is created of the car body so that it can be avoided at one go when creating a volumetric mesh.
Required physics tests can be performed on the wind tunnel volume model after volumetric meshing successfully.