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May 3, 2012, 09:26 |
Velocity in the Loop Pipe
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#1 |
New Member
blai
Join Date: Mar 2012
Posts: 8
Rep Power: 14 |
Hello,
I am new to this forum and I'm starting to simulate the tool ANSYS / FLUENT. I am developing a system of a pipe closed, and I have problem to set the velocity of the fluid inside. Can anyone tell me how to do? The picture attached is the geometry of my system! Thanks in advance |
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May 3, 2012, 10:45 |
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#2 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,672
Rep Power: 65 |
Quote:
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May 3, 2012, 12:00 |
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#3 |
New Member
blai
Join Date: Mar 2012
Posts: 8
Rep Power: 14 |
Thanks for the input LuckyTran,
For better understanding, my goal is to heat a wall to carry the heat through the fluid to the other side of the pipe. The effect of the closed loop is very important to keep in the simulation There is no way to do considering that there is no fluid can enter the loop because the temperature is changing over time? One idea could be a pump, but I want to avoid this solution. Thanks for help |
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May 3, 2012, 12:07 |
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#4 |
New Member
Join Date: May 2012
Posts: 6
Rep Power: 13 |
I also thought similar loop case.
Is there any way to set the flow inside in this loop with this geometry? I heard I can set the volume flow byUDF, however, I can not find similare tutorial. Anyone konws how to set the flow in this case? Last edited by taekyu8; May 3, 2012 at 12:29. |
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May 3, 2012, 12:40 |
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#5 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,672
Rep Power: 65 |
Quote:
You need to break open the pipe and install a pipe or something similar. So create try to make an open loop version or an open loop that is effectively a closed loop by linking the inlet and exit conditions. Most importantly, even if you could generate a steady flow, a closed loop simulation with heat transfer can easily diverge from accumulated numerical errors. Because the energy balance must be exactly correct, (heat input, output, and heat transported by the working fluid), any small residuals can easily accumulate over iterations and result in a runaway/divergent simulation. |
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May 3, 2012, 13:32 |
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#6 | |
New Member
Join Date: May 2012
Posts: 6
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Thanks for the note.
My case is fixed temperature heater. I will heat up the inside gas up to certain temperature and want to see the temperature change over time. The initial temperature is room temperature. It will be transient calculation. How do I link the inlet and exit? Quote:
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May 3, 2012, 13:43 |
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#7 |
New Member
blai
Join Date: Mar 2012
Posts: 8
Rep Power: 14 |
I have the same question, how do I link the inlet and exit ?
Again, thanks luckyTrain and taekyu8 for help !! |
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May 3, 2012, 14:02 |
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#8 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,672
Rep Power: 65 |
Quote:
You can force Fluent to model many things (might not be a good idea) by using UDFs. There's an entire forum for it. |
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