TUT: Updated vortexShed case wrt latest Curle FO updates
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Andrew Heather
parent
1251b82175
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7d4cdc4f8c
@ -16,19 +16,20 @@ FoamFile
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dimensions [0 1 -1 0 0 0 0];
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internalField uniform (40 0 0);
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internalField uniform (0.025 0 0);
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boundaryField
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{
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cylinder
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{
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type noSlip;
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type fixedValue;
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value uniform (0 0 0);
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}
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inlet
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{
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type fixedValue;
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value $internalField;
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value uniform (0.025 0 0);
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}
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outlet
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@ -38,10 +39,14 @@ boundaryField
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inletValue uniform (0 0 0);
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}
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"top|bottom"
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"(top|bottom)"
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{
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type pressureInletOutletVelocity;
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value uniform (0 0 0);
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type slip;
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}
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frontAndBack
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{
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type empty;
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}
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}
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@ -17,7 +17,7 @@ FoamFile
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dimensions [0 2 -1 0 0 0 0];
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internalField uniform 1.51e-05;
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internalField uniform 1e-05;
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boundaryField
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{
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@ -33,12 +33,22 @@ boundaryField
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value $internalField;
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}
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"outlet|top|bottom"
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outlet
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{
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type inletOutlet;
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inletValue $internalField;
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value $internalField;
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}
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"(top|bottom)"
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{
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type zeroGradient;
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}
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frontAndBack
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{
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type empty;
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}
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}
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@ -33,11 +33,16 @@ boundaryField
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value $internalField;
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}
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"outlet|top|bottom"
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"(outlet|top|bottom)"
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{
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type calculated;
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value $internalField;
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}
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frontAndBack
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{
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type empty;
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}
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}
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@ -30,15 +30,25 @@ boundaryField
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type zeroGradient;
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}
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"outlet|top|bottom"
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outlet
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{
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type totalPressure;
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type fixedValue; // totalPressure;
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rho none;
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psi none;
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p0 $internalField;
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gamma 1;
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value $internalField;
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}
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"(top|bottom)"
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{
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type zeroGradient;
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}
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frontAndBack
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{
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type empty;
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}
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}
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@ -1,3 +1,15 @@
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- Acoustic pressure is calculated based on Curle's analogy.
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- Such field is sampled for point (probe) and surface (cutting plane)
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- noise utility is operated onto these samples to obtain frequency information
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Summary
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- Vortex street generated from flow over a sphere
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- Acoustic pressure is calculated based on Curle's analogy
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- noise utility is processes the acoustic pressure to obtain frequency information
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Case detailis
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- cylinder diameter: 0.04
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- flow speed: 0.025
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- kinematic viscosity: 1e-5
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- Reynolds number based on cylinder diameter, Red = 100
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- For this Red, St = 0.198(1 - 0.197/Red) = 0.159
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- Shedding fequency, f = St*U/d = 0.1 Hz
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Plotting the FFT of the pressure field shoud show a peak at the shedding
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frequency
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@ -17,6 +17,6 @@ FoamFile
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transportModel Newtonian;
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nu 2e-05;
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nu 1e-05;
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// ************************************************************************* //
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1724
tutorials/incompressible/pimpleFoam/LES/vortexShed/surface.obj
Normal file
1724
tutorials/incompressible/pimpleFoam/LES/vortexShed/surface.obj
Normal file
File diff suppressed because it is too large
Load Diff
@ -23,15 +23,15 @@ startTime 0;
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stopAt endTime;
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endTime 0.2;
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endTime 200;
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deltaT 1e-5;
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deltaT 1e-2;
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writeControl timeStep;
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writeInterval 100; // every 0.001s
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writeInterval 100; // every 1s
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purgeWrite 200;
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purgeWrite 50;
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writeFormat binary;
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@ -55,46 +55,81 @@ functions
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fields (U p);
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}
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curle
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curleSurface
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{
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// Mandatory entries
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type Curle;
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libs (fieldFunctionObjects);
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patches (cylinder);
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c0 343;
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input surface;
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surface surface.obj;
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output surface;
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surfaceType ensight;
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formatOptions
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{
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ensight
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{
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format ascii; // needed for surfaceNoise ...
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collateTimes true;
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}
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}
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// Optional (inherited) entries
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field p;
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result Curle;
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p p;
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region region0;
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enabled true;
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log true;
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timeStart 0.1;
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timeStart 100;
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timeEnd 1000;
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executeControl timeStep;
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executeInterval 1;
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}
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curlePoint
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{
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// Mandatory entries
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type Curle;
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libs (fieldFunctionObjects);
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patches (cylinder);
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c0 343;
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input point;
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output point;
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observerPositions
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(
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(0.20 0.17 -0.01) // N
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(0.22 0.15 -0.01) // E
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(0.20 0.13 -0.01) // S
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(0.18 0.15 -0.01) // W
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);
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// Optional (inherited) entries
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p p;
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region region0;
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enabled true;
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log true;
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timeStart 100;
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timeEnd 1000;
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executeControl timeStep;
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executeInterval 1;
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writeControl writeTime;
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writeInterval -1;
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}
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cuttingPlane
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{
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type surfaces;
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libs (sampling);
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writeControl timeStep;
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writeInterval 2;
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timeStart 0.1;
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writeControl writeTime;
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timeStart 100;
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surfaceFormat ensight;
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formatOptions
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{
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ensight
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{
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format binary;
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collateTimes true;
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format binary;
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collateTimes true;
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}
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}
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fields (p Curle);
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fields (p U);
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interpolationScheme cellPoint;
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@ -106,8 +141,8 @@ functions
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planeType pointAndNormal;
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pointAndNormalDict
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{
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point (0 0 -0.01);
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normal (0 0 1);
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point (0 0 -0.01);
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normal (0 0 1);
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}
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interpolate false;
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}
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@ -119,32 +154,14 @@ functions
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type forces;
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libs (forces);
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writeControl writeTime;
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timeStart 0.1;
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timeStart 100;
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patches (cylinder);
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CofR (0.20 0.15 -0.01);
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writeFields yes;
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rho rhoInf;
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rhoInf 1.205;
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}
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probes
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{
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type patchProbes;
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libs (sampling);
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writeControl timeStep;
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timeStart 0.1;
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patch cylinder;
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probeLocations
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(
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(0.20 0.17 -0.01) // N
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(0.22 0.15 -0.01) // E
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(0.20 0.13 -0.01) // S
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(0.18 0.15 -0.01) // W
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);
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fields (p forces:force Curle);
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rhoInf 1;
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}
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}
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@ -17,13 +17,10 @@ FoamFile
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solvers
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{
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p
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{
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solver GAMG;
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smoother DICGaussSeidel;
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// solver PCG;
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// preconditioner DIC;
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tolerance 1e-20;
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relTol 0.05;
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}
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@ -37,10 +34,10 @@ solvers
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"(U|nuTilda)"
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{
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// solver PBiCGStab;
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// preconditioner DILU;
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solver smoothSolver;
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smoother symGaussSeidel;
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//solver smoothSolver;
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//smoother symGaussSeidel;
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solver PBiCGStab;
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preconditioner DILU;
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tolerance 0;
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relTol 0.1;
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}
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@ -64,9 +61,9 @@ PIMPLE
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relaxationFactors
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{
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nuTilda 0.95;
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U 0.95;
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p 0.95;
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nuTilda 0.8;
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U 0.8;
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p 0.8;
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".*Final" 1.0;
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}
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@ -34,8 +34,10 @@ pointNoiseCoeffs
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files
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(
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"postProcessing/probes/0/p"
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"postProcessing/probes/0.1/Curle"
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"postProcessing/curlePoint/0/observer0.dat"
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"postProcessing/curlePoint/0/observer1.dat"
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"postProcessing/curlePoint/0/observer2.dat"
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"postProcessing/curlePoint/0/observer3.dat"
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);
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nHeaderLine 6;
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@ -48,7 +50,7 @@ pointNoiseCoeffs
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// default = 2^16 (=65536)
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N 4096;
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rhoRef 1.205;
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rhoRef 1;
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}
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@ -34,7 +34,7 @@ surfaceNoiseCoeffs
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// Input file
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file "postProcessing/cuttingPlane/zNormal/zNormal.case";
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file "postProcessing/curleSurface/surface/surface.case";
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// Surface reader
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reader ensight;
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@ -53,13 +53,13 @@ surfaceNoiseCoeffs
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}
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// Pressure field
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p Curle;
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p pCurle;
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// Number of samples in sampling window
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// default = 2^16 (=65536)
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N 1024;
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N 4096;
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rhoRef 1.205;
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rhoRef 1;
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}
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