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Old   November 13, 2013, 07:04
Default looking for boundary condition
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Niraj
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Hi CFD users,

Refer enclosed picture.

I have a rotating fan in between int1 and int2. I am looking for the situation where the net static pressure/ net total pressure measured between PL1 and PL2 has x(eg. 10 Pa) value and mass flow rate y (e.g. 0.1 m3/min) value.

can any one suggest the methodology ??

any kind of help is appreicated.

thnks
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Old   November 13, 2013, 07:15
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Vignesh KPV
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Hi Niraj,

If I'm correct you want to display the values over pl1 and pl2 for pressure and mass flow rate.

You can use area weighted average over the the plane pl1 and pl2.

goto reports tab->surface integral.

Regards,
Vignesh
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Old   November 13, 2013, 09:51
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Niraj
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Hi Vignesh,

Thanks .

I am clear about that but exactly i am looking for the kind of BC at inlet and outlet to achieve my result as a correct pressure drop in between PL1 and PL2.
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Old   November 13, 2013, 14:10
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Alex
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As far as I know, you cannot specify both pressure difference AND mass flow rate.
One of these has to be the result of the simulation, depending on what happens between the inlet and outlet.
You can either specify a pressure difference using pressure inlet and outlet boundary conditions or a mass flow rate with a combination of massflow inlet/outlet and pressure outlet/inlet.
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