Page Comparison

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1. Fluent with fluent meshing 

2. Drag duplicate geometry to mesh 

3. Properties → m to mm 

4. Mesh → edit 

5. Double precision 8 

6. 8 processes when launching

Fluent meshing 

1. Import geometry 

2. Add local sizing 

   1. Body of influence x 2 

      1. Rename 

      2. Select option 

      3. Target mesh 

         1. Boinear 60mm 

         2. Boiwake 100mm 

   2. Curvature x 2 

      1. Rename 

      2. Select option 

         1. Fine 

            1. Local 1

            2. Max 8 

            3. Angle 14

         2. Mediumfine 

            1. Local 1

            2. Max 10

            3. Angle 16 

3. Generate surface mesh 

   1. Min 1

   2. Max 250

   3. Cells per gap 3 

   4. Generate mesh 

4. Geometry types 

   1. Consist of only fluid regions with no voids

   2. Describe geometry 

5. Update boundaries 

   1. Side and sky → symmetry  

   2. Update boundaries 

6. Update regions 

   1. Update regions 

7. Add boundary regions 

   1. Offset → last-ratio

   2. Layers 8 

   3. https://plnkr.co/edit/IWnRIQ8HCvnD4if901F9?preview  

      1. Target y+ 1

      2. Velocity 9 

      3. Length of car (check units)

      4. Calculate 

      5. Copy mm number 

   4. First height: calculated 

   5. Add boundary layers 

8. Generate volume mesh 

   1. Fill with: poly-hexcore

   2. Generate volume mesh 

9. Save and quit 

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1. Models → viscous → check curvature correction

2. Boundary conditions → inlet → inlet 

   1. Velocity 9 

   2. Turbulent intensity 3 

3. Boundary conditions → outlet → outlet

   1. turbulent intensity 1 

4. Wall → ground→ moving wall 

   1. Check direction of airflow (blue strings)

   2. Z → -1

5. Open reference values 

6. Reports → projected areas 

   1. Select fine and mediumfine 

   2. Min size 0.001

   3. Projection direction → Z

   4. Compute 

   5. Put in reference value area 

   6. Length of car 

   7. Temperature 303 

   8. Velocity 9 

7. Monitors → residual → show advanced options → convergence criterion → none 

8. Report definitions 

   1. New → force report → drag 

      1. Name: cd

      2. Direction: same as airflow 

      3. Select fine and mediumfine

      4. Print to console 

   2. New → force report → drag 

      1. Name: dragforce

      2. Direction: same as airflow 

      3. Output type: Drag force 

      4. Select fine and mediumfine

      5. Print to console 

   3. New → force report → lift

      1. Name: cl

      2. Direction: (0,1,0)

      3. Select fine and mediumfine

      4. Print to console 

9. Initialization 

   1. Hybrid initialization 

   2. Initialize 

10. Run calculations 

    1. Iterations 500 

    2. Calculate 

11. TACC Video: https://youtu.be/zt5X6b_ZuWI