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Pipe Flow-Inlet temperature profile

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Old   February 23, 2015, 16:47
Default Pipe Flow-Inlet temperature profile
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Karthick Selvam
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Dear Friends,

I am doing LES of T-junction mixing flows. Hot fluid (in main pipe) is at 142 C with 0.11 m/s velocity. Cold fluid (in branch pipe) is at 25 C, flows at 0.08 m/s.

I have two questions with regard to my inflow boundary condition at hot pipe:
- Hot fluid flow is thermally stratified (about 14 C between top and bottom of pipe) as seen from experimental data. Any suggestions on computationally incorporating this phenomenon into inflow boundary condition? I have temperature data at four angular positions (top, bottom,left and right).
- This is a follow up to the question above: Just as inflow velocity profile for developed flows, is there a defined inflow temperature profile (from top to bottom of pipe's cross-section)? It would be helpful if any references to literature are cited to learn about this topic.

Thank you for the help.

Regards,
Karthick
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Old   February 24, 2015, 02:01
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Glenn Horrocks
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ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
You can use a inlet profile for the thermal stratification, or define a CEL expression as a function of some dimension as two easy options.

Any question about thermal model should go straight to the seminal textbook on the are (well, at least the seminal textbook for me): Heat and Mass Trasfer by Incropera and DeWitt.
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Old   February 26, 2015, 11:52
Default Pipe inflow temperature profile
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Karthick Selvam
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Dear Glenn,

Thank you for recommending Heat and Mass Transfer text book. It really has some very basic information that is very useful to me.

Regards,
Karthick
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boundary condition, temperature profile, turbulent flow

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