Whats the exact procedure in total pressure BC in subsonic inflow?

immortality · April 9, 2013, 12:39

I'm confused.I need to know how does pressure inlet boundary condition works in FLUENT.I've read user guide and help.but I'm not sure whats the algorithm behind pressure inlet BC.
my case is subsonic but compressible internal flow in a tube like shock tube.
does static pressure is read from internal field of domain (adjacent cells) or its calculated from isentropic relation?if latter how when Mach is un known?
if former then Mach is obtained from isentropic p relation?if so the pressure on patch and in adjacent will be the same then whats forces flow to be inflow?
whats the procedure?
thanks.

immortality · April 10, 2013, 06:04

is there any help?

pskale · April 10, 2013, 06:37

CFD Multi flow phase in pipe analysis, can somebudy help me about it?

immortality · April 11, 2013, 08:52

could anyone guide me to understand total pressue in inlet better?

April 9, 2013, 12:39	Whats the exact procedure in total pressure BC in subsonic inflow?	#1
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	I'm confused.I need to know how does pressure inlet boundary condition works in FLUENT.I've read user guide and help.but I'm not sure whats the algorithm behind pressure inlet BC. my case is subsonic but compressible internal flow in a tube like shock tube. does static pressure is read from internal field of domain (adjacent cells) or its calculated from isentropic relation?if latter how when Mach is un known? if former then Mach is obtained from isentropic p relation?if so the pressure on patch and in adjacent will be the same then whats forces flow to be inflow? whats the procedure? thanks.

April 10, 2013, 06:37	CFD Multi flow phase in pipe analysis, can somebudy help me about it?	#3
pskale New Member Pravin Kale Join Date: Apr 2013 Posts: 1 Rep Power: 0	CFD Multi flow phase in pipe analysis, can somebudy help me about it?

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April 10, 2013, 06:04		#2
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	is there any help?

April 11, 2013, 08:52		#4
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	could anyone guide me to understand total pressue in inlet better?