Challenge

Project 1 : CFD Meshing for Tesla Cyber Truck

RRagul Raj23 Mar 2023

ANSA

Aim:-

To successfully create a surface and volume mesh for the given model along with a wind tunnel free of topological errors and quality concerns.

Procedure:-

We first visually inspect the model for topological errors like single cons, triple cons etc.
Here we see a lot of red cons, so we select the whole model and apply the topo options available in the faces toolbar
After which we can see a small number of errors, which will be fixed by examining them and editing the surfaces according to requirement.
We notice the whole model is under one PID, this will create problems while meshing, So we Create new PID and assign the appropriate surfaces.
Now we move on to the next step, surface meshing, the mesh length of each PID is not specified and hence it is as follows
- Windshield and glasses - 3mm
- Body - 3mm
- Wheels- 4mm
- Headlights - 3mm
So we now mesh the PIDs accordingly and provide the target length as a range of values for surfaces of different mesh length PIDs in contact with each other.
After this we measure the length and height of the car and take it as x and y.
We create a point relative to the points shown below.
Assuming the 1st picture denotes point A and the Second picture denotes point B.
We create a relative point y+1000 below point B and 5Y above it, and also we create a point at a distance of 3X in front of point A and a distance of 7x behind point B.
Now we create two rectangular surfaces and enclose them using 4 other rectangles. We mesh these surfaces using 100mm and 20mm as mesh lengths.
Now we move to the next step, volume mesh, we define the volumes present in the model using the "define" option in the volumetric mesh section.
Now ANSA Displays 5 closed surfaces out of which the one shown above is selected and the rest are deleted.
Now we select the Re-mesh option and wait for ANSA to render us the volumetric mesh.