About surface normal Gradient -- CFD Online Discussion Forums

September 13, 2012, 07:20	About surface normal Gradient	#1
mmkr825 Member M Mallikarjuna Reddy Join Date: Jul 2012 Posts: 91 Rep Power: 13	Hi everyone, I am fresher to openFoam. Now i am using openFoam 2.1.1 version. For my needs i need to apply zero flux at the walls for a scalar field. I am doing project on flow of suspensions (fluid and solid particles) through square channels. here i need to give zero flux at walls for the solid particle volume fraction. After applying this boundary condition i got an expression like dT/dy=f(velocity, T). where T=particle volume fraction(no units, scalar quantity). So for my case i need to give surface normal gradient. Please suggest me how to write code for it. Thanks Regards Mallikarjuna Last edited by mmkr825; September 14, 2012 at 13:11.

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