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time dependent mass flow rate

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Old   May 6, 2016, 05:10
Default time dependent mass flow rate
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niharika
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can anyone help me on how to give time dependent mass flow rate in inform.
My geometry is in polar coordinate system and is 3m long. The inlet is at z=0 and i have to specify mass flow rate varying with time. I have created a patch and tried the following statements.
(source of p1 at patch is win*rho1)
(source of w1 at patch is win)
the solver is running but i am unable to achieve the expected results. Can anyone help me

Thank you
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Old   Today, 11:41
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Hi,

You will need to write the following for specifying a mass flow:

(source of p1 at patch is coval(fixflu,win*rho1) with area)
(source of w1 at patch is coval(onlyms,win))

You will then need to apply a time varying component to the simple statements above. A simple sinusoidal function can implented as below:

real(denin,pi,omega,period,uin,mflow)
denin=1.
pi=atan(1)*4
period=1.0
omega = 2*pi/period
uin=1.0
mflow=uin*denin
(initial of p1 is mflow)
(initial of u1 is uin)
(Source of p1 at inlet is coval(fixflu,mflow*SIN(omega*TIM)) with area)
(source of u1 at inlet is uin*SIN(omega*TIM) with onlyms)

Thanks
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