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March 27, 2013, 13:57 |
CFX and Transient Thermal Results
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#1 |
New Member
Bhavik
Join Date: Apr 2012
Location: Arlington, TX
Posts: 14
Rep Power: 14 |
I used transient thermal and CFX with same setup but I am getting differences in the results. So can anyone guide me regarding this. Actually I want to use the thermal results in Transient structural to determine thermal stresses.
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March 27, 2013, 17:57 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,871
Rep Power: 144 |
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March 27, 2013, 23:44 |
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#3 |
New Member
Bhavik
Join Date: Apr 2012
Location: Arlington, TX
Posts: 14
Rep Power: 14 |
No I am not getting errors in the results but the results are not matching.
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March 27, 2013, 23:57 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,871
Rep Power: 144 |
So, you have an inaccuracy between the ANSYS and CFX simulations, right? Then the FAQ I quoted is the place to start.
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March 28, 2013, 03:47 |
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#5 |
Member
Thiagu
Join Date: Oct 2012
Location: India
Posts: 60
Rep Power: 14 |
# provide the CFX case setup / result details clearly
# how much the deviation is, which parameter is deviating |
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March 29, 2013, 00:31 |
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#6 |
New Member
Bhavik
Join Date: Apr 2012
Location: Arlington, TX
Posts: 14
Rep Power: 14 |
I have attached the CFX setup, I am getting the value of max temp different in both cases.
3.jpg Capture 2.jpg Capture.jpg s.jpg |
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March 29, 2013, 15:04 |
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#7 |
Senior Member
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 1,188
Rep Power: 23 |
Is everything the same on both simulations, initial conditions, material properties, geometry, etc?
Have you reached a grid independant, and time step independant solution with both simulations. How did you pick your timesteps? Are you converging each timestep in CFX, and if so to what residual level? Are you sure you put in the same boundary conditions in mechanical, the timesteps can be a bit tricky sometimes, especially when entering a function for multiple time steps. |
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