Week 4 Challenge : CFD Meshing for BMW car

Aim - To Perform the Topo clean up,generate mesh & volumetric mesh for the BMW car with wind tunnel.

Objective:Geometrical errors on BMW Model and Assiging the  PIDs to model parts .Meshing with the given Target length and element Quality criteria. 

Target lengths for the different parts of a model are as follow:

1. Body - 3 mm
2. Lights - 4 mm
3. Grills - 1 mm
4. Rims and Tyres - 2 mm
5. Optical Rear view mirror - 2 mm
6. Window - 2 mm
7. Silencer - 3 mm
8. Logo - 1 mm

Procedure:

After the importing BMW model .checking for the  geometry error .

 

Converting the sharp edges to smooth edges by giving the mesh length 1mm

Deleted the half portion of the BMW model.

Topo clean up for the logo.

By using the tools – project -select the cons- then select surface to project -click middle button mouse.

Delete unwanted surface. few location required the cut option for geometry to clean up & removing the double ,single cons.

 

Intersection options is used by selection first &second faces of the surface& deleted the unwanted surfaces.

Creating the new surface for the grills.

Creating the new surface after the generating the construction lines.

Creating  the pid for the different parts and deleting the unwanted pids for model.

Measuring the min lengths for the Target lengths for the different pid with measuring tool.

 Generated the mesh for the All pid  as above process is followed.

Split and move options are helped in reducing the error at the element level  

Reconstruction of mesh options is used the for reducing the skewness errors and min & max length target.

Split and move options are helped in reducing the error at the element level  

Reconstruction of mesh options is used the for reducing the skewness errors and min & max length target.

 

Split and move options are helped in reducing the error at the element level  

Half body mesh is generated for the BMW car.

Copying the remaining half by taking the 3 reference point on the existing the geometry & checked  for the geometry error.

For the generation of wind tunnel round the Car body. Relative points ,surface , spacing option for the gradual increase mesh on the wind tunnel surface body are created for the volumetric mesh is generated .Then define  option . deleted the unwanted volumetric bodyis done.

 

https://drive.google.com/file/d/1CZGbdOYLI67hl-8SWfVtvX-NMhRfNy4t/view?usp=share_link  .

 Conclusion: learnt how to perform the topo clean up ,geomentry errors,assigning the PID ,mesh generating for the different mesh lengths for different parts.creating the new surface and creating the volumetric mesh for the given model.