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Author: John Singleton, Cornell University Problem Specification |
6. Results
Temperature
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https://confluence.cornell.edu/download/attachments/146918520/UnrefTemp_Full.PNGTotal Heat Flux
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https://confluence.cornell.edu/download/attachments/146918520/UnrefTotalHeatFlux_Full.PNG...
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Temperature Contours
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<iframe width="640" height="360" src="https://www.youtube.com/embed/LZRNtWlTZH4" frameborder="0" allowfullscreen></iframe> |
Check your Understanding
Go to Step 7: Verification & Validation
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https://confluence.cornell.edu/download/attachments/146918520/DirHeatFluxVec_Full.pngX Direction Heat Flux
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https://confluence.cornell.edu/download/attachments/146918520/UnrefDirectHeatFluxXX_Full.PNG| Note |
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Temperature along Y=1m line
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https://confluence.cornell.edu/download/attachments/146918520/InsConstructGeomFull.PNG...
https://confluence.cornell.edu/download/attachments/146918520/InsertPath_Full.PNG...
https://confluence.cornell.edu/download/attachments/146918520/PathDet_Full.PNG...
https://confluence.cornell.edu/download/attachments/146918520/DetTemp2_Full.PNG...
https://confluence.cornell.edu/download/attachments/146918520/PathTempResults_Full.PNGDirectional Heat Flux along Y=0m line
Now we are interested in calculating the heat flux through the bottom boundary. First, construct a path, following steps similar to those above, but with the start and end points at the bottom corners of the surface. (Right Click) Model > Insert > Construction Geometry. Next, (Right Click) Construction Geometry > Insert > Path. Then, set Number of Sampling Points to 200, set Start X Coordinate to 0, set Start Y Coordinate to 0, set End X Coordinate to 1, and set End Y Coordinate to 0 as shown below.
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https://confluence.cornell.edu/download/attachments/146918520/PathDet_Full.PNG
Similar to the Temperature inserted along the first path, now insert Directional Heat Flux results along Path 2. (Right Click) Solution > Insert > Thermal > Directional Heat Flux. Choose Path for the Scoping Method, set Path 2 for the Path and Y axis for Orientation, as seen below.
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Now,(Click) Solve, 
, and ANSYS will find the Directional Heat Flux on the line y=0m as a function of x position. We would like to find the Total Heat Flux through the bottom, and to do this we will export the data to MATLAB. To do so, right click in the tabular data displayed in the lower righthand corner of the screen. Select all (Ctrl+A), right-click and select Export. Save the file as "qy_bot.txt" in your MATLAB working directory.
Next, open MATLAB and use the following code to integrate along the path:
clear all; clc;
qy_bot = dlmread('qy_bot.txt', '', 'B2..C50');
qy_bot_tot = trapz(qy_bot(:,1),qy_bot(:,2));
The dlmread function is used to read the data from the text file, while the trapz function performs numerical integration using trapezoids. The variable 'qy_bot_tot' calculated in MATLAB represents the total dimensionless heat flux through the bottom, y=0 line.
Save
Save the project now.
Go to Step 7: Verification and Validation
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