Project 1 : CFD Meshing for Tesla Cyber Truck
Aim: To check and solve all the geometrical errors, assign relevant PIDs, and perform surface mesh on the cyber truck geometry as well as the wind tunnel surfaces.
Working Methodology :
The working methodology that is followed to generate mesh on any geometry is :
1. Import the geometry.
2. Check for geometrical errors.
3. Geometry cleanup.
4. Assigning relevant PIDs.
5. Meshing.
step-1: Import the geometry
First, the pre-designed geometry of the Tesla Cybertruck is imported into the ANSA.
step-2: Check for geometrical errors
The Checks tool is used to check for geometrical errors like cracks, single CONS, intersections, penetrations, etc
Step-3: Geometry cleanup
The holes/missing faces indicated by single CONS are patched by creating new faces using COONS/fitted/fill hole (depending upon the best fit) tools.
after patching all the faces
Then, the penetration and intersection errors, which show up at the shafts connecting the wheels, are fixed by deleting the shafts and patching the openings by creating new faces. The penetration at the front part of the geometry is fixed by using the intersect tool and deleting the extra faces.
after fixing intersection errors
step-4 : Assigning Relevant PIDs
Here, different components of the Cybertruck are assigned different PIDs accordingly.
step-5 Meshing
First, a surface mesh is generated on the geometry with a mesh length of 4mm for the body, glass window(tolerance=1mm), and mesh length of 5mm given to the tires using the CFD mesh tool.
Then, the wind tunnel is created by creating points and then creating surfaces using the points.
The top face of the domain is given a mesh length of 200mm while the bottom face is given 50mm. And the remaining faces mesh length should vary by a factor of 1.1 from bottom to top using the spacing tool in the mesh deck.
surface mesh on the wind tunnel faces
Conclusion :
The surface mesh is generated on both the car geometry as well as the faces of the domain, which is the pre-step of generating volumetric mesh inside the fluid domain. As the generation of volumetric mesh requires a lot of resources, it is avoided.
drive link : https://drive.google.com/file/d/19MKz03qqM5sUKtYIu0c22csLIeiBqtrM/view?usp=sharing