extracting outlet velocity profile from one case to another case's inlet

tonggysun · February 6, 2013, 18:25

Hi,

I'm very new to openFoam. Currently I'm working on an interFoam case where there is a rectangular vent with air inlet on one side and pressure outlet on the other. Somewhere along the vent, fluid enters at the bottom of the vent. Let's call this the vent case.

To examine the boundary condition of the fluid inlet and save iteration time, I have also made an icoFoam case which models a chamber with curved exit nozzle where there is fluid inlet at the bottom of chamber and a pressure outlet at the end of the nozzle (which corresponds to the fluid inlet of the vent case). Let's call this the liquidSupply case.

I have successfully modelled the liquidSupply case and with the 'sample' utility, I have obtained the U vectors (velocity profile) of the exiting fluid at the pressure outlet.

Question: How do I extract this velocity profile and make it the boundary condition for the fluid inlet of the vent case. Both have inlet/outlet have the exact same patch geometry.

ps. I'm also new to coding so please give as elaborate advices as possible. Thanks!

RodriguezFatz · September 12, 2013, 05:21

I am interested in that, too. Anyone can help?

cfdonline2mohsen · September 13, 2013, 04:19

Dear tonggysun
Have a look at the following post#2
http://www.cfd-online.com/Forums/ope...-0-folder.html

February 6, 2013, 18:25	extracting outlet velocity profile from one case to another case's inlet	#1
tonggysun New Member Join Date: Feb 2013 Posts: 1 Rep Power: 0	Hi, I'm very new to openFoam. Currently I'm working on an interFoam case where there is a rectangular vent with air inlet on one side and pressure outlet on the other. Somewhere along the vent, fluid enters at the bottom of the vent. Let's call this the vent case. To examine the boundary condition of the fluid inlet and save iteration time, I have also made an icoFoam case which models a chamber with curved exit nozzle where there is fluid inlet at the bottom of chamber and a pressure outlet at the end of the nozzle (which corresponds to the fluid inlet of the vent case). Let's call this the liquidSupply case. I have successfully modelled the liquidSupply case and with the 'sample' utility, I have obtained the U vectors (velocity profile) of the exiting fluid at the pressure outlet. Question: How do I extract this velocity profile and make it the boundary condition for the fluid inlet of the vent case. Both have inlet/outlet have the exact same patch geometry. ps. I'm also new to coding so please give as elaborate advices as possible. Thanks!

September 13, 2013, 04:19		#3
cfdonline2mohsen Senior Member Mohsen KiaMansouri Join Date: Jan 2010 Location: CFD Lab Posts: 118 Rep Power: 16	Dear tonggysun Have a look at the following post#2 http://www.cfd-online.com/Forums/ope...-0-folder.html __________________ “If you have an apple and I have an apple and we exchange these apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas.”

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September 12, 2013, 05:21		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	I am interested in that, too. Anyone can help? __________________ The skeleton ran out of shampoo in the shower.