WaveTransmissive BC at inlet

allenjohngeorge · November 28, 2018, 11:34

I am doing a simulation of transonic turbine using sonicFoam. I have given inlet boundary conditions in terms of Total Pressure and Total Temperature and waveTransmissive boundary condition for pressure at outlet. I am having periodic variation in my inlet velocity after convergence. I think that this is due to reflections of waves at inlet.

Anyone knows how to give waveTransmissive boundary condition at inlet along with TotalPressure? For inlet with static pressure, I think it can be given like

inlet {

type waveTransmissive;

value uniform 80000;

field p;
gamma 1.4;
phi phiv;

rho rho;
psi psi;

lInf 0.05;

fieldInf 80000;
}

hand90 · December 11, 2019, 14:49

Hi

I know this is a while back but were you able to use the waveTransmissive boundary at the inlet? If so would you be able to share it?

Many thanks

Edee · July 15, 2022, 09:41

Hi,
Does anyone find a way how to use the WaveTransmissive BC on the inlet with the constant total pressure?
I am apparently struggling with the same problem as discussed in the earlier posts.
Thank you!

November 28, 2018, 11:34	WaveTransmissive BC at inlet	#1
allenjohngeorge New Member Allen George Join Date: Dec 2013 Posts: 16 Rep Power: 13	I am doing a simulation of transonic turbine using sonicFoam. I have given inlet boundary conditions in terms of Total Pressure and Total Temperature and waveTransmissive boundary condition for pressure at outlet. I am having periodic variation in my inlet velocity after convergence. I think that this is due to reflections of waves at inlet. Anyone knows how to give waveTransmissive boundary condition at inlet along with TotalPressure? For inlet with static pressure, I think it can be given like inlet { type waveTransmissive; value uniform 80000; field p; gamma 1.4; phi phiv; rho rho; psi psi; lInf 0.05; fieldInf 80000; }

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December 11, 2019, 14:49		#2
hand90 Member Thomas Join Date: Nov 2017 Posts: 37 Rep Power: 9	Hi I know this is a while back but were you able to use the waveTransmissive boundary at the inlet? If so would you be able to share it? Many thanks

July 15, 2022, 09:41		#3
Edee New Member Edee O'Hare Join Date: Nov 2013 Posts: 7 Rep Power: 13	Hi, Does anyone find a way how to use the WaveTransmissive BC on the inlet with the constant total pressure? I am apparently struggling with the same problem as discussed in the earlier posts. Thank you!