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Steady State Vs Transient answers

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Old   May 9, 2017, 04:57
Unhappy Can any tell me please what is the boundary condition in ansys icepak.
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Vignesh A
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I'm doing thermal analysis of heat sink with three module .in the cabinet two side opening one side is min value & other side is max value. minimum side i'm giving 10m/s velocity. Three module wattage respectively 150w,90w,60w.
Heat transfer coefficient is 10w/k.m.I'm new to analysis filed .what if ask boundary condition means what should i say.

Please answer me clearly.
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Old   May 9, 2017, 07:45
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ANSYS Icepak does not have a forum for it - the fluent one may be more appropriate but I suspect not very useful.

But an overall comment: What heat transfer coefficient are you talking about? On the surface of the heat sink, or of the whole heat sink assembly?
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Old   May 9, 2017, 10:46
Default ansys icepak boundary condition
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For whole assembly. and also please explain to me what is convergence criteria.and difference between steady state thermal analysis & transient analysi.
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Old   May 9, 2017, 18:25
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This is basic CFD modelling stuff - you need to do the tutorial examples and read the documentation to understand the basics. I am not going to rewrite a textbook in a forum post to explain basic concepts like that (sorry).
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Old   July 23, 2017, 02:20
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Hello,
When I was simulating a propeller in CFX, I used both steady and transient method, however the lift in transient is 10% higher than in steady method. I don't know why that great differences happened. Can anyone help explain that. The physical timescale in steady method is T*1/180。the time step in transient calculation is also T*1/180.
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Old   July 23, 2017, 03:20
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Inaccurate simulation results can be caused by many things. Have a look in the FAQ page for the Ansys wiki on fd-online.
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