# some formula in Segregate solver?

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 August 8, 2007, 05:00 some formula in Segregate solver? #1 sophie Guest   Posts: n/a hello,everyone! i want to know the meaning of the nomenclature in these formular in fluent user's manual: 1)in Sectioniscretization of the Momentum Equation: ap*u = sum(anb*unb) + sum(pf*A . i) + S how to get ap,anb and S? 2)in Sectioniscretization of the Continuity Equation: Jf = Jf^ + df*(pc0-pc1) how to get Jf^ and df? 3.1)in .dat file, is the pressure value the solution cell value pc? 3.2)if i compute face forces using Section:Computing Forces and Moments: Ff = -sum((pf-pref)*A*n) how can i get this pf from this pc(from3.1))? (suppose i use: segregate solver, pressure:second order, density:second order upwind, moment:second order upwind, energy:first order upwind, pressure-velocity coupling:SIMPLE to compute compressible,ideal gas density,steady flow,mach number less than 1.0 ) or did my scheme choose correctly???any suggestion? thanks! sophie

 August 8, 2007, 05:43 Re: some formula in Segregate solver? #2 Joe Guest   Posts: n/a 3.2) Compute_Force_And_Moment (Domain *, Thread *, real CG,real Force, real Moment, boolean true/false); See tut 12 UDF for usage.

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