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some formula in Segregate solver?

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Old   August 8, 2007, 05:00
Default some formula in Segregate solver?
  #1
sophie
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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

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Old   August 8, 2007, 05:43
Default Re: some formula in Segregate solver?
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Joe
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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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