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November 24, 2011, 15:16 |
buoyantSimpleFoam divergence
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#1 |
New Member
Join Date: Oct 2010
Posts: 21
Rep Power: 16 |
Hi,
I'm trying to model a buoyant thermal plume from a chimney in a cross flow of air using buoyantSimpleFoam. My rho min/max values quickly degenerate into nonsense and I'm sure it must be a boundary condition issue. I've trawled the links and tried a lot of different boundary conditions without success. The relevant b.c.'s etc are below. I'd be very grateful for any advice/suggestions. Thanks, Tom FoamFile { version 2.0; format ascii; class volScalarField; location "0"; object T; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 0 0 1 0 0 0]; internalField uniform 293; boundaryField { pressureOutlet { type inletOutlet; inletValue uniform 293; value uniform 293; } velocityInlet { type fixedValue; value uniform 293; } atmosphere { type zeroGradient; } sea { type zeroGradient; } funnel_patch0 { type fixedValue; value uniform 476; } ship_patch0 { type zeroGradient; } } // ************************************************** *********************** // FoamFile { version 2.0; format ascii; class volVectorField; object U; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 15.88 0); boundaryField { velocityInlet { type fixedValue; value uniform (0 15.88 0); } pressureOutlet { type inletOutlet; inletValue 0; value 0; } sea { type fixedValue; value uniform (0 0 0); } funnel_patch0 { type fixedValue; value uniform (-2.4248 0 17.3017); } ship_patch0 { type fixedValue; value uniform (0 0 0); } atmosphere { type zeroGradient; } } // ************************************************** *********************** // FoamFile { version 2.0; format ascii; class volScalarField; object p; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [1 -1 -2 0 0 0 0]; internalField uniform 101325.; boundaryField { pressureOutlet { type calculated; value uniform 101325; } velocityInlet { // type zeroGradient; type calculated; value uniform 101325; } atmosphere { type calculated; value uniform 101325; } sea { type calculated; value uniform 101325; } funnel_patch0 { type calculated; value uniform 101325; } ship_patch0 { type calculated; value uniform 101325; } } // ************************************************** *********************** // FoamFile { version 2.0; format ascii; class volScalarField; object p_rgh; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [1 -1 -2 0 0 0 0]; internalField uniform 0; boundaryField { pressureOutlet { type buoyantPressure; gradient uniform 0; value uniform 101325; } velocityInlet { type buoyantPressure; gradient uniform 0; value uniform 101325; } atmosphere { type buoyantPressure; gradient uniform 0; value uniform 101325; } sea { type wallBuoyantPressure; gradient uniform 0; value uniform 101325; } funnel_patch0 { type buoyantPressure; gradient uniform 0; value uniform 101325; } ship_patch0 { type wallBuoyantPressure; gradient uniform 0; value uniform 101325; } } // ************************************************** *********************** // FoamFile { version 2.0; format ascii; class dictionary; location "constant"; object thermophysicalProperties; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // thermoType hPsiThermo<pureMixture<constTransport<specieThermo <hConstThermo<perfectGas>>>>>; pRef 101325; mixture { specie { nMoles 1; molWeight 28.96; } thermodynamics { Cp 1004.4; Hf 0; } transport { mu 1.831e-05; Pr 0.705; } } // ************************************************** *********************** // |
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