[lyna]

HELLO !

I would like to impose the following boundary conditions for the two phase flow in a circular channel,
The pressure is unknown at the inlet and outlet,
but the velocity of the gas and the liquid are known at the inlet.

knowing that I have two entrances: one for the gas and other one for the liquid,
but I imposed a single output for both.

I have some doubts about the boundary conditions, because the film liquid thickness at the exit is weird! since it should remains constant but it is decreasing and taking the approximately the same shape of the inlet.
I would like to know if the problem is from boundary conditions at the exit ?
then, could you please suggest for me such a suitable boundary conditions.

NB: in attached files, boundary conditions and results at different time.

THANK YOU,

LYNA

[lyna]

Hello

I would like to impose the following boundary conditions for the two phase flow in a circular channel,
The pressure is unknown at the inlet and outlet, but the velocity of the gas and the liquid are known at the inlet.

knowing that I have two entrances: one for the gas and other one for the liquid,
but I imposed a single output for both.

I have some doubts about the boundary conditions, because the film liquid thickness at the exit is weird! since it should remains constant but it is decreasing and taking the approximately the same shape of the inlet.

then, could you please suggest for me such a suitable boundary conditions.


THANK YOU,

LYNA