[tmu]

Hi Friends
I have a solver for simulation low mach flow. I have some question about boundary condition.
I want to simulate flame propagation in open tube.
which boundary condition must I use for pd?
I used zeroGradient for walls and inlet and fixValue(=1 atm) for outlet.
but this boundary condition calculate pd about 1 atm whereas pd must be little than pReff. (pd<<pReff) and i thinck this is wrong.
thanks alot

[tmu]

no body
pleasssssssssss

[deji]

I think you ought to use buoyantPressure boundary condition for pd.

[calf.Z]

Originally Posted by tmu

Hi Friends
I have a solver for simulation low mach flow. I have some question about boundary condition.
I want to simulate flame propagation in open tube.
which boundary condition must I use for pd?
I used zeroGradient for walls and inlet and fixValue(=1 atm) for outlet.
but this boundary condition calculate pd about 1 atm whereas pd must be little than pReff. (pd<<pReff) and i thinck this is wrong.
thanks alot

I am wondering how to decouple pressure and density in the code when using low-mach number assumption. Thank you.