A fundamental problem about Pressure equation of the potentialFoam solver -- CFD Online Discussion Forums

October 6, 2006, 12:32	In page 46 in the programmar's	#1
dbxmcf Member roy fokker Join Date: Mar 2009 Posts: 44 Rep Power: 17	In page 46 in the programmar's guide, the governing equation for potentialFoam is written as div(U)==0 and Laplacian(p)==0, I know the first div(U)==0 can be easily obtained from the continuity equation, but I cannot derive this Laplacian(p)==0 from momentum equation, although it is evident that this relationship holds. How can I get this "Pressure equation"? Why the solver does not directly use the "momentum equation"? I am a newbie in CFD, this might be a too simple question, but I am really confused, thanks a lot!

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