# problems with velocity and pressure boundary conditions inb IcoFoam

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 March 31, 2013, 05:47 problems with velocity and pressure boundary conditions inb IcoFoam #1 Senior Member   mohsen kh Join Date: Jan 2013 Location: Iran Posts: 120 Rep Power: 8 Hi friends: My case of study is a furnace with numbers of holes as inlets. I know local atmosphere pressure but I have problems with boundary conditions of inlet velocity and that of outlet. I have the same problems with inlet and outlet pressure conditions and those of internal field pressure and temperature. I use IcoFoam. Please help me if you can. I do not know exactly to use which temperature to define transport properties and use for my pressure converting in P conditions. I attach the figure of my case for your consideration. http://tinypic.com/view.php?pic=167ktuw&s=6

 April 1, 2013, 02:26 #2 Senior Member   mohsen kh Join Date: Jan 2013 Location: Iran Posts: 120 Rep Power: 8 I am sure that the problem is caused by pressure boundary conditions for internal field and outlet I know the mass flux of outlet and area of it and I know the inlet gas pressure but I used "zeroGradient" as boundary condition for inlets. I almost don't know what to do with my pressure boundary condition plz help!!!

 April 1, 2013, 13:23 #3 Super Moderator   Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,123 Blog Entries: 39 Rep Power: 110 Greetings Mohsen, icoFoam ? It's a very basic solver... so shouldn't you use pimpleFoam? Or go directly to one of the other variant solvers from pimpleFoam which do have temperature and/or compression? In my level of experience, I'm only able to suggest that you first simplify your geometry and start with that simple geometry, until you can figure out how the boundary conditions work. In addition, the advantage of a simple geometry is that you can more easily share it with us, so that someone can do some trial-and-error to help you figure out the solution! Best regards, Bruno __________________ OpenFOAM: FAQ | Getting started Forum: How to get help, to post code/output and forum guide What am I doing/planning: blog/wiki Read this before sending me PM

 April 3, 2013, 00:55 #4 Senior Member   mohsen kh Join Date: Jan 2013 Location: Iran Posts: 120 Rep Power: 8 Thanks Bruno I will do so.thanks for your help but unfortunately I can't change or simplify my geometry I will use pimpleFoam.

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