Numerical Results

Temperature

To view the temperature distribution over the surface, select Solution > Temperature from the tree on the left.
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https://confluence.cornell.edu/download/attachments/146918520/UnrefTemp_Full.PNG

In order to view the contours as isolines, select the viewing button, and change from Contour Bands into Isolines.
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https://confluence.cornell.edu/download/attachments/146918520/Isolines.png

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Temperature Contours

Total Heat Flux

We will view the heat flux as vectors. This will tell us the direction of heat flow within the geometry as well as at the boundaries  In order to plot the heat flux vectors, select Solution > Total Heat Flux from the tree on the left. Then (Click) Vectors, Image Removed near the top of the GUI. The sliders in the top bar can be used to change the size and number of vectors displayed.

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At this point, the heat flux vectors should appear similar to the image below. Take a minute to think about whether the heat flow directions at the boundaries match what you expect.

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https://confluence.cornell.edu/download/attachments/146918520/DirHeatFluxVec_Full.png

Heat Flux Variation Along Bottom Surface

We’ll plot the heat flux crossing the bottom surface as a function of x. The steps involved are:

1. Create a “path” i.e. line corresponding to the bottom surface (boundary). The path will start at (0,0) and end at (1,0).
2. Plot the y-component of the heat flux along this path.
3. Export heat flux values to Excel for further processing
   These steps are demonstrated in the videos below. If the videos don't appear below, try reloading the webpage.

1. Create Path Corresponding to Bottom Surface

 <iframe width="600640" height="338360" src="https://www.youtube.com/embed/dWhIiONkR5gLZRNtWlTZH4" frameborder="0" allowfullscreen></iframe> 

Summary of the above video:

1. Select Model > Construction Geometry > Path.
2. Specify number of samples and end location of path as (1,0). Start location is (0,0) which is the default.
3. Rename path (optional).

2. Plot Directional Heat Flux along Path

 <iframe width="600" height="338" src="//www.youtube.com/embed/HQbG9tcdf4g" frameborder="0" allowfullscreen></iframe> 

Summary of the above video:

1. Solution > Thermal > Directional Heat Flux
2. Scope to Path
3. Specify Orientation i.e. direction as Y Axis.
4. Rename object in tree (optional) and then select Evaluate All Results

3. Export Data to Excel

 <iframe width="600" height="338" src="//www.youtube.com/embed/N3gyjuSiyow" frameborder="0" allowfullscreen></iframe> 

Summary of the above video:

1. Go into Tabular data
   1. Right click > Export
2. Another option: Right click > Select All
   1. Copy > Open Excel
   2. Paste and rename columns

Overall Heat Flux Crossing Boundary Surfaces

To integrate the heat flux along a boundary where temperature or convection is specified, drag the boundary condition in the tree to the Solution branch. This will add a "reaction" in the Solution Branch. Right click on this and select Evaluate All Results.

 <iframe width="600" height="338" src="//www.youtube.com/embed/3VegA1lXq2g" frameborder="0" allowfullscreen></iframe> 

Summary of the above video:

1. To calculate overall heat flux at bottom surface
   1. Drag Temperature from Steady-State Thermal onto Solution tree
   2. Rename Reaction Probe to "Overall heat flux crossing bottom surface"
   3. Right click > Evaluate all results
2. To calculate overall heat flux at right boundary
   1. Do the same steps but with Convection in step 1a

The overall heat fluxes are reported as “reactions” at boundaries in ANSYS. This terminology comes from analogy with structural mechanics and is explained in the video below.

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Check your Understanding

our free online course on ANSYS simulations.

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Summary of the above video:

1. First way to probe any value in the domain
   1. Highlight Temperature
   2. Click on Probe icon in the top toolbar
   3. Click on a particular location
   4. To delete, highlight label icon under File
   5. Press delete
2. Second way to probe a particular vertex in the domain
   
   1. Select Solution in the tree
   2. Select in the Solution row toolbar Probe > Temperature
   3. Click Select Vertices icon in top toolbar
   4. Select the vertex of choice
   5. Press Apply in Location Method
   6. Press Solve

To get the value of the temperature at a particular location within the model:

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Summary of the above video:

1. Create a co-ordinate system centered at the particular location.
   1. Go to Tree > Highlight Coordinate Systems
   2. Click Create Coordinate System Icon
   3. Origin X and Origin Y should be 0.5 m and 1 m
2. Insert a probe that uses this co-ordinate system
   
   1. Highlight Solution in the tree
   2. Click Probe icon in toolbar > Temperature
   3. For Location method > My Coordinate System
   4. Click Solve

Save

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Go to Step 7: Verification & Validation

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