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How to calculate heat transfer for two different velocity fields?

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Old   June 10, 2014, 02:52
Default How to calculate heat transfer for two different velocity fields?
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My problem is as follows:
I would like to calculate the flow in the pipe for two different inlet velocities v1 and v2 (steady state). Assume I will get flow field 1 and 2. Then, I would like to turn on the transient simulation and calculate heat transfer. Under certain conditions it should be calculated if inlet velocity is v1, otherwise with v2. I am not sure what is the best way to do it.
I would be really thankful for any suggestions!
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