Collocated SIMPLE and outlet pressure

yhoarau · April 15, 2009, 12:01

Hi,

i've written an incompressible collocated solver based on SIMPLE scheme. It works fin for steady flow but with unsteady flow (a cylinder at Reynolds 100) i have problem at the outlet with the pressure: i have a blocking effect if I imposed the pressure at the outlet and if i use neumann then the pressure increase every where. In many commercial solver the outlet imposed pressure works fine. Can somebody explain the trick to me?

Many thanks

yhoarau · April 16, 2009, 10:16

Does anyone have any ideas?

April 15, 2009, 12:01	Collocated SIMPLE and outlet pressure	#1
yhoarau New Member Hoarau Yannick Join Date: Mar 2009 Posts: 24 Rep Power: 17	Hi, i've written an incompressible collocated solver based on SIMPLE scheme. It works fin for steady flow but with unsteady flow (a cylinder at Reynolds 100) i have problem at the outlet with the pressure: i have a blocking effect if I imposed the pressure at the outlet and if i use neumann then the pressure increase every where. In many commercial solver the outlet imposed pressure works fine. Can somebody explain the trick to me? Many thanks

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April 16, 2009, 10:16		#2
yhoarau New Member Hoarau Yannick Join Date: Mar 2009 Posts: 24 Rep Power: 17	Does anyone have any ideas?