Project 1 : CFD Meshing for Tesla Cyber Truck

AIM:

CFD Meshing for Tesla Cyber Truck.

Objective:

Target lengths for the different parts of a model can be decided by your own. Finer mesh will give good results and will compromise with the longer processing time

Meshing Wind tunnel volume with tetra elements may take upto 2 days of time. So that is not compulsory to perform. As this is a major project, It is advisable to mesh that completely by taking some days of time. Write a detailed report for the same.

Note: All the 2D elements(Trias) in your model should clear the quality criteria (i.e. Off elements should be zero).

Target length:

body: 4mm

Tyre: 2mm

Windows: 5mm

Procedure:

First we have to import the geometry model in ANSA.

Next we have to change the model ENT to PID mode.

next step we have to do topo for this model. after finish topo then will have this model like this.

After this we have to patch that particular unclosed surfaces using NEW>COONS/FITTED option.

the geometry cleanup finished.

next we are going to assign PID's for this particular model.

BODY:

TYRES:

WINDOWS:

SURFACE MESH:

BODY: 4mm

TYRES: 2mm

WINDOWS: 5mm

CREATING WIND TUNNEL:

1. First, we need to create reference points to create wind tunnel surfaces.

2. Select relative under points in topo mode, create a point below the car taking one reference point and entering the correct values.

3. And calculating the wind tunnel dimensions appropriately, we can create the wind tunnel accurately.

4. The wind tunnel dimmensions are:

car model: 5906mm .................. (x)

Front surface distance(from reference point): 22000mm .................. (4x)

Back surface distance(from reference point): 42000mm .................. (6x)

Top surface distance(from reference point): 19000mm .................. (3x)

5. After creating the bottom surface use the curves for having the reference of cons, we can delete all the hot points and curves.

Surafce meshing of wind tunnel:

1. We need to apply surface meshing depending the mesh length near the car and regions far away from it.

2. Therefore we need to apply different mesh lengths at the bottom and top wind tunnel surfaces.

3. We need to use spacing option to have a mesh length varying from the small mesh length size to larger mesh length.

4. Surface meshing can be achieved by doing this accordingly.

Results:

Completed cybertruck model with wind tunnel.

ANSA FILE:

https://drive.google.com/file/d/1hoNVJRl-F2HLdRfOkUsgfB9oU5VTP__M/view?usp=sharing

Conclusions:

1. Cybertruck car model is topo-cleaned and surface meshed appropriately.

2. Finally wind tunnel is created and surface meshed with reference to the car model size.