Project 1 : CFD Meshing for Tesla Cyber Truck
AIM:
The aim of this project is to pre-process the tesla cyber truck and mesh it.
OBJECTIVES:
For the given model, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria.
Steps:
We start with importing the file.
The geometry is filled with single cons to eliminate these we use the Topo option.
Before that, as geometry is symmetrical, we can cut it into half.
After completed with the TOPO clean up the geometry is shown below,
After this step, we are flagging the appropriate boundaries to the respective regions as shown below,
After giving the boundaries we are meshing the geometry with the given mesh lengths.
The meshed Geometry is shown in the below picture,
Once the mesh is generated on all the regions of the truck, we can now generate the complete truck model.
This is done by the use of the symmetry option. Transform > copy > entities > symmetry > mirror 3 point plane, then select any 3 points on the symmetric plane.
Once this is done, all the entities will get copied to the other side of the symmetric plane.
Wind Tunnel Dimensions:
a. Distance from the wind tunnel inlet to the front of the truck= 4L
b. Distance from the aft of the truck to the wind tunnel outlet= 6L
c. Distance from the sides of the truck to its respective wind tunnel sides= L
d. Distance from the floor to the top surface of the wind tunnel= 3L
The virtual wind tunnel is created by first, identifying the origin of the global coordinate system, then, the location of wind tunnel floor corners is calculated and points created, these points are joined with curves.
A face can be created from these curves. To get the top surface of the wind tunnel, a copy of this face is offset at a distance of 3L.
The side faces and the inlet and the outlet of the wind tunnel can be created by using the reference of the wind tunnel top surface and floor cons.
Now a surface mesh must be generated on the wind tunnel surface.
To achieve this first the wind tunnel floor and top surfaces are meshed separately with triad mesh elements and the mesh target length of 20mm and 100mm respectively.
Now, to mesh the other faces in a gradually increasing manner, go to mesh> perimeters> spacing, select the 4 edges, take biasing as geometric (1.1), and dmin= 20, dlimit= 100.
Next, mesh the geometry using spot mesh, and check for quality criteria errors if any. If there are any errors, it can be rectified mesh> shell mesh> reconstruct.
Once the surface mesh is generated on all the components, the volumetric mesh can be created.
In volume mesh> define> auto-detect> whole data base.
Conclusion:
The tesla cyber truck model has been meshed.Total of 35792848 2D elements have been generated.
Volumetric Mesh is no done in this project.
Drive link:
https://drive.google.com/file/d/1TVIxteKy_vbYAKDEuy_iAb-gSWrmzQ7F/view?usp=share_link