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Integrated Foundation code to commit 104aac5
This commit is contained in:
Andrew Heather
@ -2,6 +2,61 @@ Overview
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========
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+ Template case for rotating geometry flow for a closed geometry
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+ Can be used for MRF or AMI simulations
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+ Setup to run the simpleFoam solver
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+ Set up is like inflowOutflowRotating but without inlet and outlet
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+ See $FOAM_ETC/templates/closedVolume/README for details of use
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+ Setup to run the simpleFoam solver for MRF, pimpleDyMFoam for AMI
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+ The case is designed to be meshed with snappyHexMesh
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+ snappyHexMesh is setup to use 3 trisurface files
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+ fixed.obj: CAD of the stationary geometry
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+ rotating.obj: CAD of the rotating geometry
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+ rotatingZone.obj: CAD of surface bounding the rotating region
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+ Copy the *.obj files to the constant/triSurface directory
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+ The fixed.obj should contain an inlet and outlet region to create the relevant
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patches in the mesh
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Background Mesh
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===============
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+ The blockMeshDict file contains a configuration for a cylindrical background
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mesh aligned along the z-axis
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+ The mesh includes a core box-shaped block and inner and outer cylinders
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+ The backgroundMesh subdictionary includes key geometric parameters of the mesh
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+ The inner cylinder relates to the rotatingZone.obj
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+ The outer cyliner relates to the external boundary, e.g. fixed.obj
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+ Set the radii of inner and outer cylinders to ~2% larger than respective OBJ
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files
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+ Set background mesh density with boxCells, inCells, outCells and zCells
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+ Run blockMesh
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+ NOTE: An alternative blockMeshDict-box file exists if the user wants a regular
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box-shaped background mesh, similar to set up in the inflowOutflow template
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Features
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========
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+ Run surfaceFeatureExtract to extract features for explicit feature capturing
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Castellated Mesh
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================
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+ run snappyHexMesh to obtain a castellatedMesh
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+ Review the mesh; modify refinement levels and regenerate the mesh as required
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(levels are set in refinementSurfaces and refinementRegions)
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Snapped Mesh
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============
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+ In snappyHexMeshDict, set castellatedMesh off; snap on;
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+ Run the snapping phase of snappyHexMesh
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+ Review the mesh
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Layers
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======
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+ To add layers to the mesh along wall boundary patches...
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+ Switch on addLayers; switch snap off;
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+ Run snappyHexMesh
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+ The number of layers can be changed by modifying nSurfaceLayers
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Initialisation
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==============
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+ Initialise the field files in the 0 directory
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+ Set the viscosity in constant/transportProperties
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+ Rotating properties are set in constant/rotatingZoneProperties
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+ For MRF, this file is included from system/fvOptions
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+ For AMI, this file is included from constant/dynamicMeshDict
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+ Ensure settings are appropriate in controlDict, fvSchemes, fvSolution, for
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relevant simulation; for AMI, in particular, ensure that deltaT, ddtSchemes
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and relaxationFactors are set for transient simulation
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@ -14,47 +14,175 @@ FoamFile
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Example configuration:
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// - Cylindrical mesh along z-axis (0 < z < 10)
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// - External boundary (fixed.obj) radius = 3
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// - Rotating zone (rotatingZone.obj) radius = 1
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backgroundMesh
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{
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xMin -1;
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xMax 1;
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yMin -1;
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yMax 1;
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zMin -1;
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zMax 1;
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xCells 20;
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yCells 20;
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zCells 20;
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radOut 3.06; // larger than fixed.obj by ~ 1/cos(45/boxCells)
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radOutN -3.06;
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radIn 1.02; // larger than rotatingZone.obj (see above)
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radInN -1.02;
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radBox 0.30; // ~30% of rotatingZone.obj
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radBoxN -0.30;
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zMin 0;
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zMax 10; // External boundary axial length
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boxCells 5; // Cells across inner box-shaped block
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inCells 5; // Cells in radial direction, inner cylinder
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outCells 8; // Cells in radial direction, outer cylinder
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zCells 50; // Cells in axial direction
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outGrading 2.0; // Expansion ratio in outer region, radial direction
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}
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geometry
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{
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rotatingZone
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{
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type searchableCylinder;
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point1 (0 0 -100);
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point2 (0 0 100);
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radius $:backgroundMesh.radIn;
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}
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fixed
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{
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type searchableCylinder;
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point1 (0 0 -100);
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point2 (0 0 100);
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radius $:backgroundMesh.radOut;
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}
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}
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convertToMeters 1;
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vertices
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(
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($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMin)
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($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMin)
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($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMin)
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($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMin)
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($:backgroundMesh.radBoxN $:backgroundMesh.radBoxN $:backgroundMesh.zMin)
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($:backgroundMesh.radBox $:backgroundMesh.radBoxN $:backgroundMesh.zMin)
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($:backgroundMesh.radBox $:backgroundMesh.radBox $:backgroundMesh.zMin)
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($:backgroundMesh.radBoxN $:backgroundMesh.radBox $:backgroundMesh.zMin)
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($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMax)
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($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMax)
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($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMax)
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($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMax)
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project
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($:backgroundMesh.radInN $:backgroundMesh.radInN $:backgroundMesh.zMin)
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(rotatingZone)
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project
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($:backgroundMesh.radIn $:backgroundMesh.radInN $:backgroundMesh.zMin)
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(rotatingZone)
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project
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($:backgroundMesh.radIn $:backgroundMesh.radIn $:backgroundMesh.zMin)
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(rotatingZone)
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project
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($:backgroundMesh.radInN $:backgroundMesh.radIn $:backgroundMesh.zMin)
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(rotatingZone)
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project
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($:backgroundMesh.radOutN $:backgroundMesh.radOutN $:backgroundMesh.zMin)
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(fixed)
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project
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($:backgroundMesh.radOut $:backgroundMesh.radOutN $:backgroundMesh.zMin)
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(fixed)
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project
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($:backgroundMesh.radOut $:backgroundMesh.radOut $:backgroundMesh.zMin)
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(fixed)
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project
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($:backgroundMesh.radOutN $:backgroundMesh.radOut $:backgroundMesh.zMin)
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(fixed)
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($:backgroundMesh.radBoxN $:backgroundMesh.radBoxN $:backgroundMesh.zMax)
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($:backgroundMesh.radBox $:backgroundMesh.radBoxN $:backgroundMesh.zMax)
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($:backgroundMesh.radBox $:backgroundMesh.radBox $:backgroundMesh.zMax)
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($:backgroundMesh.radBoxN $:backgroundMesh.radBox $:backgroundMesh.zMax)
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project
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($:backgroundMesh.radInN $:backgroundMesh.radInN $:backgroundMesh.zMax)
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(rotatingZone)
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project
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($:backgroundMesh.radIn $:backgroundMesh.radInN $:backgroundMesh.zMax)
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(rotatingZone)
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project
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($:backgroundMesh.radIn $:backgroundMesh.radIn $:backgroundMesh.zMax)
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(rotatingZone)
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project
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($:backgroundMesh.radInN $:backgroundMesh.radIn $:backgroundMesh.zMax)
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(rotatingZone)
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project
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($:backgroundMesh.radOutN $:backgroundMesh.radOutN $:backgroundMesh.zMax)
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(fixed)
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project
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($:backgroundMesh.radOut $:backgroundMesh.radOutN $:backgroundMesh.zMax)
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(fixed)
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project
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($:backgroundMesh.radOut $:backgroundMesh.radOut $:backgroundMesh.zMax)
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(fixed)
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project
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($:backgroundMesh.radOutN $:backgroundMesh.radOut $:backgroundMesh.zMax)
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(fixed)
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);
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boxMesh
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($:backgroundMesh.boxCells $:backgroundMesh.boxCells $:backgroundMesh.zCells)
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simpleGrading (1 1 1);
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inMesh
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($:backgroundMesh.boxCells $:backgroundMesh.inCells $:backgroundMesh.zCells)
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simpleGrading (1 1 1);
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outMesh
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($:backgroundMesh.boxCells $:backgroundMesh.outCells $:backgroundMesh.zCells)
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simpleGrading (1 $:backgroundMesh.outGrading 1);
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blocks
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(
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hex (0 1 2 3 4 5 6 7)
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(
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$:backgroundMesh.xCells
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$:backgroundMesh.yCells
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$:backgroundMesh.zCells
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)
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simpleGrading (1 1 1)
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hex (0 1 2 3 12 13 14 15) $boxMesh
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hex (1 0 4 5 13 12 16 17) $inMesh
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hex (0 3 7 4 12 15 19 16) $inMesh
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hex (2 1 5 6 14 13 17 18) $inMesh
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hex (3 2 6 7 15 14 18 19) $inMesh
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hex (5 4 8 9 17 16 20 21) $outMesh
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hex (4 7 11 8 16 19 23 20) $outMesh
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hex (6 5 9 10 18 17 21 22) $outMesh
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hex (7 6 10 11 19 18 22 23) $outMesh
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);
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edges
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(
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project 4 5 (rotatingZone)
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project 5 6 (rotatingZone)
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project 6 7 (rotatingZone)
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project 7 4 (rotatingZone)
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project 16 17 (rotatingZone)
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project 17 18 (rotatingZone)
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project 18 19 (rotatingZone)
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project 19 16 (rotatingZone)
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project 8 9 (fixed)
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project 9 10 (fixed)
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project 10 11 (fixed)
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project 11 8 (fixed)
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project 20 21 (fixed)
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project 21 22 (fixed)
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project 22 23 (fixed)
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project 23 20 (fixed)
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);
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boundary
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68
etc/templates/closedVolumeRotating/system/blockMeshDict-box
Normal file
68
etc/templates/closedVolumeRotating/system/blockMeshDict-box
Normal file
@ -0,0 +1,68 @@
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/*--------------------------------*- C++ -*----------------------------------*\
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| ========= | |
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| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
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| \\ / O peration | Version: plus |
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| \\ / A nd | Web: www.OpenFOAM.com |
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| \\/ M anipulation | |
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\*---------------------------------------------------------------------------*/
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FoamFile
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{
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version 2.0;
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format ascii;
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class dictionary;
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object blockMeshDict;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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backgroundMesh
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{
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xMin -1;
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xMax 1;
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yMin -1;
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yMax 1;
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zMin -1;
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zMax 1;
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xCells 20;
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yCells 20;
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zCells 20;
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}
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convertToMeters 1;
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vertices
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(
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($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMin)
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($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMin)
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($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMin)
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($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMin)
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($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMax)
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($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMax)
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($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMax)
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($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMax)
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);
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blocks
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(
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hex (0 1 2 3 4 5 6 7)
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(
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$:backgroundMesh.xCells
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$:backgroundMesh.yCells
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$:backgroundMesh.zCells
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)
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simpleGrading (1 1 1)
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);
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edges
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(
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);
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boundary
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(
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);
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mergePatchPairs
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(
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);
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// ************************************************************************* //
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@ -83,11 +83,13 @@ castellatedMeshControls
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locationInMesh (1e-5 1e-5 1e-5); // Offset from (0 0 0) to avoid
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// coinciding with face or edge
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nCellsBetweenLevels 3;
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}
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snapControls
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{
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explicitFeatureSnap true;
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implicitFeatureSnap false;
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}
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addLayersControls
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