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Adding constant heat flux along the boundary of fluid channel |
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#1 |
New Member
Ghada
Join Date: Feb 2018
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Hello everybody!
So I'm trying to simulate the water sub-channel between the fuel rods in the spent fuel pool of a nuclear reactor. The question is that how can I add a constant heat flux along the boundary wall of the channel and not only at the center of it? |
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#2 |
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Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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If you use a heat flux boundary condition on a wall boundary it gets applied evenly over the entire boundary by default.
But the temperature for this type of heat flux on a wall boundary will probably have a hot patch in the middle and cooler patches on the edges. Is this what you mean?
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#3 |
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Ghada
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Yes exactly!
So I can't have a constant flux along the boundary? only constant temperatures? |
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#4 |
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Glenn Horrocks
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You can define a wall boundary to have constant heat flux or constant temperature.
Make sure you know the difference between heat flux and temperature: a constant heat flux will give you a hot bit in the middle, and constant temperature will mean the heat flux will be reduced in the middle.
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#5 |
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Ghada
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Okay got it .
So can I, by any means, make the flux constant long the wall boundary from the bottom to the top of the channel (assume the channel is vertical)? Because in my case, there is a heat flux generated from the fuel to the water all the way long.. |
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#6 |
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Ghada
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Actually I'm looking for a "uniform" heat flux..can you help me?
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#7 |
Super Moderator
Glenn Horrocks
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So then use a wall heat flux condition for the thermal model on the wall boundary. The default is a specified temperature. It is just a different option on the GUI, nothing difficult.
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#8 |
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Ghada
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It worked very well! Thank you very much.
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