The document describes the steps taken to perform a CFD analysis of flow over a horizontal plate using ANSYS Fluent. The analysis used the Spalart-Allmaras, k-epsilon, and k-omega turbulence models to simulate flow of air and water over the plate at velocities of 10m/s, 100m/s, and 350m/s. The steps included setting up the geometry, meshing, selecting models and materials, applying boundary conditions, running calculations to convergence, and examining results through contours.

1. CFD Analysis of Horizontal plate in Fluent
The analysis was done in Workbench 14.5 .
The analysis of flow on horizontal plate in 2-dimension was done.
Analysis for turbulent flow was done.
The following turbulent models were used :
1. Spalart Allmaras Model
2. K - epsilon Model
3. K - omega Model
The following fluids were considerd :
1. Air
2. Water
Steps Involved :
1. Open workbench.
2. Select Fluid Flow (Fluent) in Analysis System from toolbox.
3. Right click on Geometry and select Edit
Geometry.

2. 4. Select a plane for sketching (say xy).Right click on the plane and select look at.
5. Select sketching.
6. Draw the domain and the shape of the plate using the sketching tools and dimension the
using the dimension tools.
7. Convert the sketch to surface using “Surfaces from sketches” in concepts from toolbox.
8. Draw lines on the geometry for aiding in structured meshing.

3. 9. Use “projection” on the back side of the surface for aiding in structured meshing.
10. Use “Generate” in between various steps to bring about change in the geometry.
11. Close the geometry window.
12. Right click on mesh and select “Edit”
13. For initial mesh right click on “mesh” and select “generate mesh”.
14. Select the basic size setting of the mesh. These include :

4.  Physics Preference
 Solver preference
 Relevance
 Advance size function from (off, proximity & curvature, proximity, curvature or
fixed) in order to generate the required meshing.
 Relevance center(from fine , medium or coarse)
 Minimum and maximum mesh size etc
15. Use various meshing tools to attain the required manipulations in the mesh. These
include:
 Method
 Sizing
 Refinement
 Mapped face meshing
16. Generate Meshing in between the find the changes made in the
mesh.

5. 17. Create named selection for input and output.
18. Exit mesh.
19. Right click on Setup and select edit.
20. Select models from tool bar and select the model to be used for analysis. The available
models are :
 Inviscid flow
 Laminar flow
 Spalart - allmaras model
 K-epsilon model
 K-omega model etc

6. 21. Select materials from toolbox and the select materials from the fluent database by double
clicking on the fluid on the solid.
22. Select “Boundary conditions” from toolbox and set various values at different named
selections by selecting the named selection and clicking on “edit”.
23. Click on solution initialization and click on “Initialize”.

7. 24. Select “Run calculations” from toolbox and set no of iterations to a minimum of 1000.
25. Click on calculate and see if the error in calculations is converging. If yes the n close
Setup. If no then either increase the calculations by clicking on calculate again or in a
pessimistic case change the meshing and repeat until the error converges.
26. Right click on results and select “Edit”.

8. 27. Select contour from the toolbar and press ok.
28. Select “symmetry1” in location and select the parameter to be viewed(say velocity)and
press apply to get the result.

9. Results
Model Spalart - allmaras
Fluid Air
Velocity 10m/s

10. Model Spalart - allmaras
Fluid Air
Velocity 100m/s

11. Model Spalart - allmaras
Fluid Air
Velocity 350m/s

12. Model Spalart - allmaras
Fluid Water
Velocity 10m/s

13. Model Spalart - allmaras
Fluid Water
Velocity 100m/s

14. Model Spalart - allmaras
Fluid Water
Velocity 350m/s

15. Model K - epsilon
Fluid Air
Velocity 10m/s

16. Model K - epsilon
Fluid Air
Velocity 100m/s

17. Model K - epsilon
Fluid Air
Velocity 350m/s

18. Model K - epsilon
Fluid Water
Velocity 10m/s

19. Model K - epsilon
Fluid Water
Velocity 100m/s

20. Model K - epsilon
Fluid Water
Velocity 350m/s

21. Model K - omega
Fluid Air
Velocity 10m/s

22. Model K - omega
Fluid Air
Velocity 100m/s

23. Model K - omega
Fluid Air
Velocity 350m/s

24. Model K - omega
Fluid Water
Velocity 10m/s

25. Model K - omega
Fluid Water
Velocity 100m/s

26. Model K - omega
Fluid Water
Velocity 350m/s