/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | foam-extend: Open Source CFD | | \\ / O peration | Version: 4.1 | | \\ / A nd | Web: http://www.foam-extend.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object transportProperties; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // // equationReaderDemo makes these variables available to your equations: // // t time // C.x x co-ordinate // C.y y co-ordinate // C.z z co-ordinate // V cell volume // p pressure // U.x velocity x // U.y velocity y // U.z velocity z // R_.xx Reynolds stress tensor xx // R_.xy Reynolds stress tensor xy // R_.xz Reynolds stress tensor xz // R_.yy Reynolds stress tensor yy // R_.yz Reynolds stress tensor yz // R_.zz Reynolds stress tensor zz // scalar sources: // sA, sB, sC // DimensionedScalarSources: // dsA, dsB, dsC // scalarField sources (cannot be used for GeometricField output equations) // sfA, sfB, sfC // volScalarField sources // vsfA, vsfB, vsfC // vector sources // vA.x, vA.y, vA.z // vB.x, vB.y, vB.z // vC.x, vC.y, vC.z // DimensionedVectorSources: // dvA.x, dvA.y, dvA.z // dvB.x, dvB.y, dvB.z // dvC.x, dvC.y, dvC.z // vectorField sources (cannot be used for GeometricField output equations) // vfA.x, vfA.y, vfA.z // vfB.x, vfB.y, vfB.z // vfC.x, vfC.y, vfC.z // volVectorField sources // vvfA.x, vvfA.y, vvfA.z // vvfB.x, vvfB.y, vvfB.z // vvfC.x, vvfC.y, vvfC.z // tensor sources // tA.xx, tA.xy, tA.xz, tA.yx, tA.yy, tA.yz, tA.zx, tA.zy, tA.zz // tB.xx, tB.xy, tB.xz, tB.yx, tB.yy, tB.yz, tB.zx, tB.zy, tB.zz // tC.xx, tC.xy, tC.xz, tC.yx, tC.yy, tC.yz, tC.zx, tC.zy, tC.zz // DimensionedTensorSources: // dtA.xx, dtA.xy, dtA.xz, dtA.yx, dtA.yy, dtA.yz, dtA.zx, dtA.zy, dtA.zz // dtB.xx, dtB.xy, dtB.xz, dtB.yx, dtB.yy, dtB.yz, dtB.zx, dtB.zy, dtB.zz // dtC.xx, dtC.xy, dtC.xz, dtC.yx, dtC.yy, dtC.yz, dtC.zx, dtC.zy, dtC.zz // tensorField sources (cannot be used for GeometricField output equations) // tfA.xx, tfA.xy, tfA.xz, tfA.yx, tfA.yy, tfA.yz, tfA.zx, tfA.zy, tfA.zz // tfB.xx, tfB.xy, tfB.xz, tfB.yx, tfB.yy, tfB.yz, tfB.zx, tfB.zy, tfB.zz // tfC.xx, tfC.xy, tfC.xz, tfC.yx, tfC.yy, tfC.yz, tfC.zx, tfC.zy, tfC.zz // volVectorField sources // vtfA.xx, vtfA.xy, vtfA.xz, vtfA.yx, vtfA.yy, vtfA.yz, vtfA.zx, vtfA.zy, // vtfA.zz // vtfB.xx, vtfB.xy, vtfB.xz, vtfB.yx, vtfB.yy, vtfB.yz, vtfB.zx, vtfB.zy, // vtfB.zz // vtfC.xx, vtfC.xy, vtfC.xz, vtfC.yx, vtfC.yy, vtfC.yz, vtfC.zx, vtfC.zy, // vtfC.zz // Also, this dictionary is, itself, a "source", so you can define your own // variables, including: // scalars // dimensionedScalars // other equations // * * * * * * * * * * * * * * Scalar Equations * * * * * * * * * * * * * * // // scalar // You can use any variables on single scalars. If a field is used, equation // reader will take the value at cell index 0 unless you tell it otherwise. // You can mix types, provided you give a valid component. This equation is // for a scalar, so it ignores dimensions. sOut "sA + dsB + vC.x + tA.yz"; // dimensionedScalar // This equation will be evaluated twice: once for the scalar value, and once // for the dimensionSet. If the dimensions don't match, it will fail. You // can subscribe a dimensionSet. This will disable dimension-checking, and // force the outcome to the dimensions you give it - this is shown for dsfOut. dsOut "sqrt(sqr(vB.x) + sqr(vB.y) + sqr(vB.z))"; // dimenionedScalarField // You can use any variables on fields. If single variables appear, they are // assumed uniform throughout the field. If GeometricFields appear, the // boundary field is ignored. If another field is given, its size must match. // Index checking is slow, so it is only available in FULLDEBUG mode. In this // equation, we define a dimensionSet. This forces the outcome to the // prescribed dimension. dsfOut [0 0 0 0 0 0 0] "V / C.x * t"; // volScalarField // This is for a GeometricField. GeometricField equations are very picky // about their source data. They can either use single-element sources, such // as scalars, tensors, etc., or other GeometricFields. The GeometricFields // must have the same sizes. volSfOut "sOut * vsfA + max(vtfA.yz, vtfA.zy)"; // * * * * * * * * * * * * * * Vector Equations * * * * * * * * * * * * * * // // vector // You can't define vector or tensor equations. equationReader only works // with scalars. To get it to work, you have to evaluate them one component // at a time. To use a constant built-in to OpenFOAM, append _ to the name. //vOut.x "U.x / stabilise(C.x, VSMALL_) * t"; //vOut.y "U.y / stabilise(C.y, VSMALL_) * t"; //vOut.z "U.z / stabilise(C.z, VSMALL_) * t"; vOut.x [0 0 0 0 0 0 0] "R_.xx"; //"R_.xx * C.x / dsC"; vOut.y [0 0 0 0 0 0 0] "C.x"; //"R_.xx * C.x / dsC"; vOut.z [0 0 0 0 0 0 0] "R_.xx * C.x / dsC"; //"R_.xx * C.x / dsC"; // dimensionedVector // To simplify an equation, you can create your own additional equations. // equationReader will find and evaluate them on-the-fly when needed. This // only works in dictionaries that are data sources to the equationReader. dvOut.x "U.x / velocityMagnitude"; dvOut.y "U.y / velocityMagnitude"; dvOut.z "U.z / velocityMagnitude"; velocityMagnitude "sqrt(sqr(U.x) + sqr(U.y) + sqr(U.z))"; // dimensionedVectorField // Any amount of white space is okay. Use a backslash to break a line. The // equation can use +, -, *, /, and any functions I could find available to // scalar or dimensioned scalar. Use the pow(a,b) instead of a^b. Use // parentheses to any depth you wish. dvfOut.x [0 0 0 0 0 0 0] "R_.xx * log ( C.x / dsC + 4 ) + 2 * pi_ / 360 \ - max( \ C.x, C.y) * dvOut.x"; dvfOut.y [0 0 0 0 0 0 0] " max \ (\ C.x, \ max \ ( \ C.y, \ C.z \ ) \ )"; dvfOut.z "1 + 2 * pow(3, pow(2, pow((2*3*4/(7*(8+4))), 3)))"; // You get the idea. // volVectorField volVfOut.x "1"; volVfOut.y "1"; volVfOut.z "1"; // * * * * * * * * * * * * * * Tensor Equations * * * * * * * * * * * * * * // // tensor tOut.xx "1"; tOut.xy "1"; tOut.xz "1"; tOut.yx "1"; tOut.yy "1"; tOut.yz "1"; tOut.zx "1"; tOut.zy "1"; tOut.zz "1"; // dimensionedTensor dtOut.xx "1"; dtOut.xy "1"; dtOut.xz "1"; dtOut.yx "1"; dtOut.yy "1"; dtOut.yz "1"; dtOut.zx "1"; dtOut.zy "1"; dtOut.zz "1"; // dimensionedTensorField dtfOut.xx "1"; dtfOut.xy "1"; dtfOut.xz "1"; dtfOut.yx "1"; dtfOut.yy "1"; dtfOut.yz "1"; dtfOut.zx "1"; dtfOut.zy "1"; dtfOut.zz "1"; // volTensorField volTfOut.xx "1"; volTfOut.xy "1"; volTfOut.xz "1"; volTfOut.yx "1"; volTfOut.yy "1"; volTfOut.yz "1"; volTfOut.zx "1"; volTfOut.zy "1"; volTfOut.zz "1"; // ************************************************************************* //