Author: John Singleton, Cornell University

Problem Specification
1. Pre-Analysis & Start-Up
2. Geometry
3. Mesh
4. Setup (Physics)
5. Solution
6. Results
7. Verification and Validation
Exercises

4. Setup (Physics)

Material Properties

At this point, the material, "Cornellium", will be assigned to the geometry. Then, ANSYS will know the value of k, the coefficient of thermal conductivity, to use in the boundary value problem. To assign the material, expand Geometry, , in the tree outline. Next, click on Surface Body, . Then set Assignment to Cornellium in the "Details of Surface Body" table, as shown below.


https://confluence.cornell.edu/download/attachments/146918515/SetMatProp.PNG


Adiabatic Boundaries

The top and left edges of the rectangular domain are perfectly insulated. In order to incorporate these boundary conditions, first (Right Click) Steady-State Thermal > Insert > Perfectly Insulated, as shown below. 


https://confluence.cornell.edu/download/attachments/146918515/PerfIns_Full.png


Next, hold down Control key and click on the top and left edges of the rectangle. Holding down the Control key lets you select multiple items. Then, (Click) Apply in the "Details of Heat Flow" table.

Isothermal Boundary

The bottom edge of the rectangular domain has a constant non-dimensional temperature of theta=1. Recall that we are specifying the dimensional problem in ANSYS such that the dimensional and non-dimensional values of temperature are the same. To implement this boundary condition, (Right Click) Steady-State Thermal > Insert > Temperature , as shown below. 


https://confluence.cornell.edu/download/attachments/146918515/InsTemp_Full.png


Next, click on the bottom side of the rectangle and (Click) Apply in the "Details of Temperature" table. Then, set Magnitude to 1 degree Celsius as shown below. 


https://confluence.cornell.edu/download/attachments/146918515/SetTemp_Full.png


Convective Boundary

The right side of the rectangle has a convective boundary condition with a Biot Number of 5 and ambient temperature of 0. To implement this boundary condition, (Right Click) Steady-State Thermal > Insert > Convection , as shown below. 


https://confluence.cornell.edu/download/attachments/146918515/InsConv_Full.png


Next, click on the right side of the rectangle and (Click) Apply in the "Details of Convection" table. Then, set the Film Coefficient (i.e. convection coefficient) to 5 W/(m^2 C) and set the Ambient temperature to 0 degrees Celsius, as shown below. 


https://confluence.cornell.edu/download/attachments/146918515/DetConv_Full.png


This concludes the setup process.

Save

Save the project now. Do not close Mechanical.


Go to Step 5: Solution

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