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Old   November 19, 2012, 11:59
Default Periodic B.C
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Quote:
Originally Posted by sbaffini View Post
In the custom field function above, the pressure is the one effectively solved for by Fluent; in this case it gives you p_in = p_out (at least for the straight pipe case).

If you performed a periodic computation by fixing the mass flow, then dp/dx is available in the periodic b.c. panel (it also has a direction, which you needed to fix... hopefully, along the pipe axis). So, to know the presure jump in your case you just need to compute dp/dx * L where L is the length of the pipe
Thanks Paolo, i get it now. Are you a workbench user? How do you in this case have this pressure gradient available in workbench for optimization studies?
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Old   November 19, 2012, 17:25
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Dear Kamu,

for several reasons i am not a Workbench user and i know nothing about the setting of the parameters for their external use in workbench. However, while in theory there should not be any difficulty in setting the pressure as a parameter, it happens that this variable is also very weird (it is an output for fixed mass flow rate cases, its monitoring is far from being straightforward, etc.)... so, there might be chances that it actually can't be used as parameter.
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Old   November 20, 2012, 01:48
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Originally Posted by sbaffini View Post
Dear Kamu,

for several reasons i am not a Workbench user and i know nothing about the setting of the parameters for their external use in workbench. However, while in theory there should not be any difficulty in setting the pressure as a parameter, it happens that this variable is also very weird (it is an output for fixed mass flow rate cases, its monitoring is far from being straightforward, etc.)... so, there might be chances that it actually can't be used as parameter.
Dear Paolo,
Thanks alot, looks like i will have to get it manually from FLUENT. I have tried all possible post-processing options to see if there is anything that is related to it in vain. Otherwise thanks once again
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