[Delcraft]

Hello,

Does anyone knows how to define time-varying mass flow inlet boundary condition in OpenFOAM, where the mass flow cannot be described by the single time function? Example for such mass flow distributions in time is attached.

P.S. If anyone knows, how to define the boundary condition as a some function (e.g., of time) it will be very interesting for me too. I will be grateful for any information.

Best Regards,
Delcraft

[alexeym]

Hi,

flowRateInletVelocity BC defines flowrate as

//- Inlet integral flow rate
        autoPtr<DataEntry<scalar> > flowRate_;

so you can use is like

inlet
{
    type flowRateInletVelocity;
    massFlowRate table
    (
        0 0
        1 5
        2 10
        3 0
        ...
    )
}

(or if you'd like to set volumetric flow rate use volumetricFlowRate instead).

Or if your inlet area is fixed you can use just uniformFixedValue.

Here are other options on time-dependent BCs: http://www.openfoam.org/version2.1.0...conditions.php

[Delcraft]

Alexeym,
Thanks a lot!

Regards,
Delcraft