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ON/OFF mass flow at an inlet boundary condition

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Old   April 12, 2014, 07:12
Default ON/OFF mass flow at an inlet boundary condition
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Dear sirs

Can any one help me in defining an on/off mass flow rate for a "mass flow inlet" boundary? Please.

Need to allow a mass flow rate example to pause (or off) every x seconds and then flow (or on) every x seconds.

A simple solution please.

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Old   April 12, 2014, 12:07
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I think it can be done with udf; read udf manual, section DEFINE_PROFILE; write a mass flow function of time using if sentences, for example if time >0 && time <5 than mass flow rate =10; elseif time >=5 && time <10 than mass flow rate =0; else mass flow rate=10

Or if you cannot write the udf you can simply stop the simulation and manually change mass flow rate values

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