Week 4 Challenge : CFD Meshing for BMW car

CFD MESHING FOR BMW CAR

AIM:

To check and solve geometrical errors and assigning PIDs

Performing meshing with target length and element quality criteria

Creating and Meshing wind tunnel volume

CHECKING AND SOLVING GEOMETRICAL ERROR:

After Cleanup the grills

After Cleanup the logo

After Cleanup the tyres

PERFORMING MESHING AND ELEMENT QUALITY CRITERIA:

ELEMENT QUALITY CRITERIA:

1.Skewness

2.Min length

3.Max length

After meshing ,

Grills,

Target length = 1mm

Min length = 0.8mm

Max length = 1.2mm

Tyres and windows , rear view mirror,

Target length = 2mm

Min length = 1.5mm

Max length = 2.5mm

Body,

Target length = 3mm

Min length = 2.5mm

Max length = 3.5mm

Lights ,

Target length = 4mm

Min length = 3.5mm

Max length = 4.5mm

After CFD meshing and freezing, we can see with zero off elements

The above image shows the full model with zero off elements and zero unmeshed elements.

TO CREATE WIND TUNNEL AND MESHING:

By creating relative points on the bottom and offset the bottom face to top face and followed by creating new side faces

To create wind tunnel,dimensions of wind tunnel are followed by literature review.

Meshing the top and bottom face and side faces

Bottom Face target length = 20mm

min length = 1mm

max length = 30mm

Top Face target length = 100mm

min length = 90mm

max length = 110mm

Side faces

Here by manual spacing, D_start and D_Limit are specified as 20 and 100mm

BMW CAR WITH WIND TUNNEL(ENCLOSURE)

ASSIGNED PID'S: