BC for pipe that connecte to the pump

ati_ros61 · November 24, 2009, 03:59

Dear experts
I want to simulate a pipe that connected to a pump. the water in pump is not impotant for me. I want to model the pipe only. Can I use the pressure B.C. for boundary that water remove the computational domain, from the pipe to pump? can I use the minus pressure(P<0) at this boundary? do i use the stagnation pressure or static pressure?

Regards
Ati

MuxaB · November 29, 2009, 18:57

Ati,

Yes, you can use a pressure BC at the outlet, including a negative pressure. For consistency, you should use either fixed static pressure at both inlet and outlet, or have a flow rate defined at one boundary and static pressure at the other.

Michael

November 24, 2009, 03:59	BC for pipe that connecte to the pump	#1
ati_ros61 New Member Atiieh Rostami Join Date: Oct 2009 Location: malaysia Posts: 17 Rep Power: 16	Dear experts I want to simulate a pipe that connected to a pump. the water in pump is not impotant for me. I want to model the pipe only. Can I use the pressure B.C. for boundary that water remove the computational domain, from the pipe to pump? can I use the minus pressure(P<0) at this boundary? do i use the stagnation pressure or static pressure? Regards Ati

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November 29, 2009, 18:57		#2
MuxaB Senior Member michael barkhudarov Join Date: Mar 2009 Location: Sante Fe, New Mexico, USA Posts: 336 Rep Power: 18	Ati, Yes, you can use a pressure BC at the outlet, including a negative pressure. For consistency, you should use either fixed static pressure at both inlet and outlet, or have a flow rate defined at one boundary and static pressure at the other. Michael