Cylinder Cooling


1. Create Case

We will start the simulation by creating a new case named cylinder_cooling

1. Go to New panel
2. Provide chosen name cylinder_cooling
3. Click Create Case

2. Create Geometry - Cylinder

We need to create a cylindrical boundary for the domain. For this purpose, we will create a cylindrical geometry for later use in the meshing process.

1. Go to Geometry panel
2. Select Create Cylinder
3, 4. Define origin, length, and radius of the cylinder accordingly

Origin[m] 0 0 -0.25

Length[m] 0.5
Radius[m] 0.05

3. Geometry - Cylinder

After creating a cylindrical boundary, it will appear in the 3D panel.

1. Click Fit View to zoom the geometry

4. Meshing Properties - Cylinder

1. Go to Hex Meshing panel
2. Click cylinder_1
3. Select Mesh Geometry
4. Select Create Boundary Layer Mesh

5. Base Mesh - Geometry and Mesh

We will define the base mesh now.

1. Go to the Base tab
2. Chose Plate Mesh Type
3. Define base mesh minimum and maximum extend

Min[m] -1 -0.4
Max[m] 1 0.4

4. Define division along each axis

Division 200 80

6. Base Mesh - Boundaries

1. Define boundary names accordingly

X- inlet
X+ outlet

2. Define the following boundary types accordingly

Y- wall
Y+ wall

7. Material Point - Fluid

Now we will define material point outside the cylinder geometry.

1. Go to Point tab
2. Set location of the material point

Material Point 0 0.2 0

8. Meshing - Fluid Region

1. Go to Mesh tab
2. Start the meshing process with Mesh button

9. Mesh - Fluid Region

After a few minutes of meshing the following mesh should appear.

1. Click Fit View to zoom the geometry

10. Create Sub-Region - Fluid

After creating the mesh, we have to make a sub-region – fluid.

1. Go to Mesh panel
2. Press Options button
3. Select Make sub-region option
4. Enter name fluid for the sub-region
5. Click OK button

11. Material Point - Solid

Now we will define material point for sub-region – solid.

1. Go to Hex Meshing panel
2. Go to Point tab
3. Set location of the material point

Material Point 0 0 0

12. Meshing - Solid Region

Everything is set up now for the meshing of the solid region

1. Go to Mesh tab
2. Start the meshing process with Mesh button

13. Mesh - Solid Region

After a few minutes of meshing the following mesh should appear.

1. Click Fit View to zoom the geometry

14. Create Sub-Region - Solid

After creating the mesh, we have to make a sub-region – solid.

1. Go to Mesh panel
2. Press Options button
3. Select Make sub-region option
4. Enter name solid for the sub-region
5. Click OK button

15. Create Region Interface

Two mesh regions are not coupled until you create a region interface. It will be further used to define which information is exchanged between regions.

1. Select Solid type for solid region
2, 3. Make sure you have selected wall type for cylinder_1
4. Hold Ctrl key and select cylinder_1 in fluid and cylinder_1 in solid
5.Click Create Region Interface icon

16. Select Solver

1. Go to Setup panel
2. Select Transient filter
3. Select Heat Transfer model filter
4. Pick CHT Multi Region
5. Select solver

17. Thermophysical Properties - Fluid

We will define now the thermodynamic properties of fluid material.

1. Go to Thermo panel
2. Select fluid region
3. Select Constant Density
4. Click Material Database button

18. Thermophysical Properties - Fluid

1. Select water material
2. Click Apply

19. Thermophysical Properties - Solid

We will define now the thermodynamic properties of solid material.

1. Select solid region
2. Select Constant Density
3. Click Material Database button

20. Thermophysical Properties - Solid

1. Select steel material
2. Click Apply

21. Solution - Solvers

1. Go to Solution panel
2. Go to the Pimple tab
3. Increase the number of Correctors to 2

22. Operating Conditions

1. Go to Operating Conditions panel
2. Define gravitational acceleration

g[m/s2] 0 -9.81 0

23. Boundary Conditions - Inlet (Flow)

1. Go to Boundary Conditions panel
2. Select inlet
3. Change character to velocity inlet
4. Define inlet velocity

Reference Value [m/s] 0.1

24. Boundary Conditions - Inlet (Thermal)

1. Go to Thermal boundary conditions tab
2. Set the following parameters accordingly

Type Fixed Value
Value [K] 300

25. Initial Conditions

1. Go to Initial Conditions panel
2. Select solid region
3. Set temperature T to 400

26. Run -Time Control

1. Go to Run panel
2. Set Simulation Time [s] to 200
3. Change Time Stepping to Automatic
4. Set initial and maximum time step accordingly

Initial Δt[s] 0.2
Max Δt[s] 0.2

27. Run - Output

1. Switch to Output panel
2. Set Write Control Interval [s] to 5
3. Run Simulation

28. Monitor Solution - Residuals

29. Start Postprocessing with ParaView

1. Go to Postprocessing panel
2. Run ParaView

30. ParaView - Load Results

Now we are loading results into the ParaView.
1. Select cylinder_cooling.foam
2. Click Apply to load results into ParaView
3. After loading results they will be shown in the 3D graphic window

31. ParaView - Change Background

We can change the coloring scheme in ParaView to have nicer colors.
1. Click Load a Color Palette
2. Select White Background

32. ParaView - Choose Preset (I)

1. Click Edit Color Map from the menu placed on the left side, if the panel is not already shown.

33. ParaView - Choose Preset (III)

1. Select Choose Preset from the Color Map Editor placed by default on the right side of the ParaView
2. Search rainbow
3. Choose Blue to Red Rainbow preset.
4. Apply changes
5. Close Choose Preset window
6. Set Number of Table Values to 20
7. Click Save current color map settings values as default for all arrays

34. ParaView - Display Temperature Contour (I)

1. Select contour coloring variable to T
2. Click Last Frame
3. Click Rescale to Data Range
4. Click First Frame
5. Click Play

35. ParaView - Display Temperature Contour (II)

After applying changes the contour will be shown in the 3D window.

36. ParaView - Display Temperature Contour (III)

1. Click First Frame
2. Click Rescale to Custom Data Range
3. Set maximum value
Max 305
4. Click Rescale
5. Click Play

37. ParaView - Results

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