boundary conditions

November 18, 2005, 04:07

hi,

I KNOW FLOW RATE and PRESSURE DROP(BETWEEN INLET AND OUTLET) Which B.Cs. should i select. the problem is of pipe flow with one inlet and one outlet.

Thanks in advance

November 18, 2005, 04:22

There's a relation ship between the flow rate and the pressure drop, so i think that in both way you should have the same results! the easiest way i think that's to use the pressure boundries for both inlet and outlet of the pipe.

November 21, 2005, 06:16

Both are fine and should give you same results upon convergence. But fixed mass flow rate will normally converge faster.

November 18, 2005, 04:07	boundary conditions	#1
subhash Guest Posts: n/a	hi, I KNOW FLOW RATE and PRESSURE DROP(BETWEEN INLET AND OUTLET) Which B.Cs. should i select. the problem is of pipe flow with one inlet and one outlet. Thanks in advance

November 18, 2005, 04:22	Re: boundary conditions	#2
Lelia Guest Posts: n/a	There's a relation ship between the flow rate and the pressure drop, so i think that in both way you should have the same results! the easiest way i think that's to use the pressure boundries for both inlet and outlet of the pipe.

November 21, 2005, 06:16	Re: boundary conditions	#3
John Luo Guest Posts: n/a	Both are fine and should give you same results upon convergence. But fixed mass flow rate will normally converge faster.

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