inlet boundary conditions

newOFuser · May 28, 2012, 01:50

Hi Foamers

I am looking to use the reflecting and non-reflecting inlet boundary conditions to run different cases as mentioned in the paper:
"Large Eddy Simulation of Combustion Dynamics of Bluff Body Stabilized Flame"
"Both cases with acoustically reflecting and non-reflecting inlet boundary conditions are modeled. The setting of the acoustic boundary conditions for the inlet is based on linear acoustic analysis."
"The reflecting inlet boundary condition is rigid boundary condition for acoustic waves, and all acoustic waves that encounter the boundary are reflected":
u'=0, u=u0
"Non-reflecting boundary condition is perfectly open for acoustic waves and all acoustic waves can pass through the boundary without being reflected":
p'=0, u'=-p/rho*a, u=u0+u'

Could someone point out if there are inbuilt boundary conditions in OF that can be used for the above?

Thanks so much,
amit

immortality · January 10, 2013, 09:08

hi
Im modelling wave rotor.the bcs are giving error.how can i find the reflecting bc is appropriate for my case or non reflecting one?

May 28, 2012, 01:50	inlet boundary conditions	#1
newOFuser Member ak Join Date: May 2011 Posts: 64 Rep Power: 15	Hi Foamers I am looking to use the reflecting and non-reflecting inlet boundary conditions to run different cases as mentioned in the paper: "Large Eddy Simulation of Combustion Dynamics of Bluff Body Stabilized Flame" "Both cases with acoustically reflecting and non-reflecting inlet boundary conditions are modeled. The setting of the acoustic boundary conditions for the inlet is based on linear acoustic analysis." "The reflecting inlet boundary condition is rigid boundary condition for acoustic waves, and all acoustic waves that encounter the boundary are reflected": u'=0, u=u0 "Non-reflecting boundary condition is perfectly open for acoustic waves and all acoustic waves can pass through the boundary without being reflected": p'=0, u'=-p/rho*a, u=u0+u' Could someone point out if there are inbuilt boundary conditions in OF that can be used for the above? Thanks so much, amit fumiya likes this.

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January 10, 2013, 09:08		#2
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 27	hi Im modelling wave rotor.the bcs are giving error.how can i find the reflecting bc is appropriate for my case or non reflecting one?