Project 1 : CFD Meshing for Tesla Cyber Truck

Aim

To mesh volumetric mesh for Testla cyber Truck for CFD Analysis

COMMAND USED

SURFACE

CONNS

Fill Holes

Patch the hole with close loop single coon

Faces

cut or uncut

cut the face from the point to edge or point, uncut the selected edge

New

Conns

patch the single conns

Point

relative

with reference point new point created with co-ordinate

curve

create a curve with respect to points

Clean UP

symmetry clean up

geometry check-up

geometry error has been rectified and check the geometry

Clean up

remove single conn by patching the edges

Geometry check

check the geometry error like single conn, penetration

MESHING

2D Tetra Mesh

Meshing Each Component

COMMAND

SET MESH MESH PARAMETER AND QUALITY criteria for different parts with is mention

Mesh Generated Tool

CFD Meshing- auto-sizing ing meshing according to average sizing

Free mesh- constant mesh size

Mesh Edit Command

Grids

move- move the node

align - align the model points

Element Quality

finding minimum and maximum size using distance command spacing set for different parts

Body

min- 3mm

max- 100 mm

Tire

min-1 mm

max-10 mm

EXTERNAL CONTROL VOLUME SURFACE

External Volume (CV) 2D MESH

TOP & BOTTOM SURFACE

MINIMUM- 300 MM

MAXIMUM- 500 MM

SIDE SURFACE BIASING 2D MESH

set min 100 with biasing factor- 0.75

Volumetric Mesh

PROCEDURE

1. Initially, the geometry is cut in half and deleted due to the symmetry nature of the truck for simplicity
2. clean up the truck using the new surface creation tool
3. check the cleanup geometry using the check-geometry command to make sure no error
4. 2D Tetra mesh is done for the body and tyres with a different mesh size check the mesh size by specifying quality criteria
5. copy of mesh truck to obtain full car truck with 2D Mesh
6. check the 2D mesh quality and edit the mesh using mesh editing command
7. the external surface is created to capture control volume and 2D, the mesh is done with the top and bottom mesh with constant mesh surfaces that specify side mesh with biasing meshing method so it captures fine mesh at bottom & top bigger cells
8. Volumetric Mesh is done

PROBLEM FACED

minimum mesh size cannot be done this is due to overload for the system

Due to overload in mesh cell software closed many times, this is rectified by reducing mesh cell but it is not advisable to take mesh count as a conclusion without grid independent study so further quality increase leader system power

conclusion

Tesla cyber Truck is clean up, and the external volume mesh is done successfully

File Link

https://drive.google.com/file/d/1As_GE2xt-qW1nsKHtpEmAvaDMoh4qUrX/view?usp=sharing

Gratitude

Skill lync team for support and course

Rajesh for the wonderful support in the course