[david39]

Hello,

I am new in the OpenFOAM world so please apology if my question is simple.

I have a model with an inlet defined as total pressure inlet boundary condition and an outlet defined as pressure outlet boundary condition.
The aim of the simulation is to determine the massflow in a pipe.

For the inlet boundary, I have used the type "turbulentIntensityKineticEnergyInlet" for 0/k and "turbulentMixingLengthDissipationRateInlet" for 0/epsilon in order to define the turbulence quantities at the boundary.
Thanks to this boundary condition type, the turbulence quantities depend on the velocity at the inlet (massflow).

At the outlet, I have backflow. I already have added an extrusion to limit the backflow but there are still recirculation at the oulet boundary.

For the moment, I use a "inletOutlet" to define the turbulence for the backflow but k and epsilon are constant.

So, for the outlet, I would like to define 0/k and 0/epsilon in a similar way as at the inlet (by using the turbulent intensity and the mixing length) to make the backflow turbulence depending on the backflow-massflow but for the moment, I have not found how to define the turbulence at the outlet.

How should I define 0/k and 0/epsilon for the outlet in order to specify a turbulent intensity and a mixing length for the k and epsilon calculation ? Is it possible in OpenFOAM?

It would be nice if someone could help me.

Thanks,
David