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April 15, 2024 at 6:43 am
n2390n
SubscriberHello, I'm facing a problem that other users have encountered.
Based on previous posts, I've noticed that other users have encountered similar issues. I've read through their posts, but I still can't seem to resolve the problem myself.
I checked the guidelines in Workbench. The handbook provides a formula that suggests users should use appropriate timestep sizes. However, I'm not sure about this cuz my results seem incorrect.(negative TEMP)
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timestep :20
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A five-layer rectangular prism model (8000*1600*1 um) with a mesh size of 0.4 um, where the top layer provides heat flux.
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and the initial temperature of the model is 22
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And after confirming the material properties, there are no errors in the settings. Could anyone tell me where I may have missed something in the settings that led to results contradicting physical phenomena?
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April 15, 2024 at 8:32 am
Erik Kostson
Ansys EmployeeÂ
Â
Hi
Except of using smaller time step (try that , so calculate dt time step as shown here : https://www.linkedin.com/pulse/calculating-solution-settings-transient-thermal-analysis-eric-stamper)
also the mesh and it size can influence.
See here for more info:
https://simutechgroup.com/transient-thermal-analysis-with-non-physical-temperature-results/
All the best
Erik
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April 15, 2024 at 12:41 pm
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April 15, 2024 at 12:57 pm
Erik Kostson
Ansys EmployeeHi
I would suggest to really look through the posts in detail:
Mesh related: https://simutechgroup.com/transient-thermal-analysis-with-non-physical-temperature-results/
Time step related: https://www.linkedin.com/pulse/calculating-solution-settings-transient-thermal-analysis-eric-stamper
All the best and hope this info helps
Erik
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April 16, 2024 at 6:18 am
n2390n
Subscribergot it, thx alot
Will try it through
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