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February 27, 2024, 10:51 |
deforming mesh with AMI
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New Member
Rithwik Kandukuri
Join Date: Mar 2023
Posts: 4
Rep Power: 3 |
Hi. im using OFv2306. trying to simulate a VAWT with a heaving motion superimposed. Due to problem geometry constraints, my airfoil wall is extremely close to my AMI interface. Due to this constraint, I think the cells near the AMI interface get heavily skewed a few time steps in. I'm working on refining the mesh right now. Other pointers to fix this issue, or alternative methods to acheive this would be great ( tried overset meshes, not been very succesful with it, case is very transient and pressure oscillations are too uncontrollable ) . I'm attaching my pointDisp and dynamicMeshDictFiles
dynamicMeshDict Code:
FoamFile { version 2.0; format ascii; class dictionary; location "system"; object dynamicMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dynamicFvMesh dynamicMultiMotionSolverFvMesh; //dynamicMotionSolverFvMesh; // Specification of rotation around centre dynamicMultiMotionSolverFvMeshCoeffs { dualWing1 { cellZone innerVar-cells; solver solidBodyDisplacementLaplacian; solidBodyDisplacementLaplacianCoeffs { solidBodyMotionFunction multiMotion; multiMotionCoeffs { rotation_2 { // Apply counter rotation to keep dualWing aligned solidBodyMotionFunction rotatingMotion; rotatingMotionCoeffs { origin (0 2.527 0);; axis ( 0 0 1); omega 1.7453; //5.52 rad/s } } } diffusivity quadratic inverseDistance ("var_foil1"); } } } Code:
``` // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 0 0 0 0 0]; internalField uniform (0 0 0); boundaryField { back { type empty; } bottom { type symmetryPlane; } front { type empty; } inlet { type fixedValue; value uniform (0 0 0); } outerSliderBase { type cyclicAMI; type fixedValue; value $internalField; } outerSliderVar { patchType cyclicAMI; type fixedValue; value $internalField; } outlet { type fixedValue; value uniform (0 0 0); } top { type symmetryPlane; } innerSliderVar { patchType cyclicAMI; type fixedValue; value $internalField; } base_foil1 { type fixedValue; value uniform (0 0 0); } var_foil2 { type fixedValue; value uniform (0 0 0); } var_foil1 { type solidBodyMotionDisplacement; solidBodyMotionFunction oscillatingRotatingMotion; oscillatingRotatingMotionCoeffs { origin ( 0 2.527 0 ); axis ( 0 0 1 ); omega 3; amplitude ( 0 0 5 ); } } base_foil2 { type fixedValue; value uniform (0 0 0); } innerSliderBase { type cyclicAMI; type fixedValue; value $internalField; } } // ************************************************************************* // ``` |
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Tags |
ami, mesh deformation, openfoam, skewed cells, v2306 |
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