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Merge branch 'master' of /home/dm4/OpenFOAM/OpenFOAM-dev
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@ -1,13 +1,11 @@
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Stiff chemistry solver validation test cases
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gri : GRI-Mech 3.0. CH4 combustion, 53 species, 325 reactions
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h2 : H2 combustion, 10 species, 27 reactions
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nc7h16 : n-Heptane combustion, 544 species, 2446 reactions
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ic8h18 : iso-Octane combustion, 874 species, 3796 reactions
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Results interpreted in 'validation' sub-folder, where OpenFOAM results
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are compared against those predicted by Senkin (CHEMKIN II)
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are compared against those predicted by CHEMKIN II.
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Overall the best performing ODE solver is seulex followed closely by rodas32.
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@ -23,7 +23,7 @@ chemistryType
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chemistry on;
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initialChemicalTimeStep 1e-6;
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initialChemicalTimeStep 1e-7;
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EulerImplicitCoeffs
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{
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@ -33,9 +33,9 @@ EulerImplicitCoeffs
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odeCoeffs
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{
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solver Rosenbrock43;
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solver seulex;
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absTol 1e-12;
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relTol 1e-2;
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relTol 1e-1;
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}
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@ -23,13 +23,19 @@ chemistryType
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chemistry on;
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initialChemicalTimeStep 1e-10;
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initialChemicalTimeStep 1e-7;
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EulerImplicitCoeffs
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{
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cTauChem 1;
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equilibriumRateLimiter off;
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}
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odeCoeffs
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{
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solver SIBS;
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solver seulex; //rodas32;
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absTol 1e-12;
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relTol 1e-2;
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relTol 1e-1;
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}
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@ -23,13 +23,19 @@ chemistryType
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chemistry on;
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initialChemicalTimeStep 1e-10;
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initialChemicalTimeStep 1e-7;
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EulerImplicitCoeffs
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{
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cTauChem 1;
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equilibriumRateLimiter off;
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}
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odeCoeffs
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{
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solver SIBS;
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solver seulex;
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absTol 1e-12;
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relTol 1e-3;
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relTol 1e-1;
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}
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@ -23,13 +23,19 @@ chemistryType
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chemistry on;
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initialChemicalTimeStep 1e-10;
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initialChemicalTimeStep 1e-7;
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EulerImplicitCoeffs
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{
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cTauChem 10;
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equilibriumRateLimiter no;
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}
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odeCoeffs
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{
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solver SIBS;
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solver seulex;
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absTol 1e-14;
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relTol 1e-4;
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relTol 1e-1;
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}
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@ -10,7 +10,6 @@ FoamFile
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version 2.0;
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format ascii;
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class pointVectorField;
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location "0.01";
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object pointDisplacement;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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@ -37,8 +36,9 @@ boundaryField
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centreOfMass (0.5 0.5 0.5);
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momentOfInertia (0.08622222 0.08622222 0.144);
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mass 9.6;
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rhoInf 1; // needed only for solvers solving for kinematic pressure
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rhoInf 1;
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report on;
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accelerationRelaxation 0.3;
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value uniform (0 0 0);
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}
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}
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