336fb3bddf
ENH: add generalised log-law type ground-normal inflow boundary conditions for wind velocity and turbulence quantities for homogeneous, two-dimensional, dry-air, equilibrium and neutral atmospheric boundary layer (ABL) modelling ENH: remove `zGround` entry, which is now automatically computed ENH: add `displacement height` entry, `d` ENH: add generalised atmBoundaryLayerInletOmega boundary condition ENH: add a verification case for atmBoundaryLayerInlet BCs DOC: improve atmBoundaryLayerInlet header documentation BUG: fix value-entry behaviour in atmBoundaryLayerInlet (fixes #1578) Without this change: - for serial-parallel computations, if `value` entry is available in an `atmBoundaryLayerInlet` BC, the theoretical ABL profile expressions are not computed, and the `value` entry content is used as a profile data - for parallel computations, if `value` entry is not available, `decomposePar` could not be executed. With this change: - assuming `value` entry is always be present, the use of `value` entry for the ABL profile specification is determined by a flag `initABL` - the default value of the optional flag `initABL` is `true`, but whenever `initABL=true` is executed, `initABL` is overwritten as `false` for the subsequent runs, so that `value` entry can be safely used. Thanks Per Jørgensen for the bug report. BUG: ensure atmBoundaryInlet conditions are Galilean-invariant (fixes #1692) Related references: The ground-normal profile expressions (tag:RH): Richards, P. J., & Hoxey, R. P. (1993). Appropriate boundary conditions for computational wind engineering models using the k-ε turbulence model. In Computational Wind Engineering 1 (pp. 145-153). DOI:10.1016/B978-0-444-81688-7.50018-8 Modifications to preserve the profiles downstream (tag:HW): Hargreaves, D. M., & Wright, N. G. (2007). On the use of the k–ε model in commercial CFD software to model the neutral atmospheric boundary layer. Journal of wind engineering and industrial aerodynamics, 95(5), 355-369. DOI:10.1016/j.jweia.2006.08.002 Expression generalisations to allow height variation for turbulence quantities (tag:YGCJ): Yang, Y., Gu, M., Chen, S., & Jin, X. (2009). New inflow boundary conditions for modelling the neutral equilibrium atmospheric boundary layer in computational wind engineering. J. of Wind Engineering and Industrial Aerodynamics, 97(2), 88-95. DOI:10.1016/j.jweia.2008.12.001 The generalised ground-normal profile expression for omega (tag:YGJ): Yang, Y., Gu, M., & Jin, X., (2009). New inflow boundary conditions for modelling the neutral equilibrium atmospheric boundary layer in SST k-ω model. In: The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, Taipei, Taiwan. Reproduced benchmark: Rectangular prism shown in FIG 1 of Hargreaves, D. M., & Wright, N. G. (2007). On the use of the k–ε model in commercial CFD software to model the neutral atmospheric boundary layer. Journal of wind engineering and industrial aerodynamics, 95(5), 355-369. DOI:10.1016/j.jweia.2006.08.002 Benchmark data: HW, 2007 FIG 6 TUT: update simpleFoam/turbineSiting tutorial accordingly
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*--------------------------------*- C++ -*----------------------------------*\
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| ========= | |
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| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
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| \\ / O peration | Version: v1912 |
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| \\ / A nd | Website: 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 volVectorField;
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object U;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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dimensions [0 1 -1 0 0 0 0];
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internalField uniform (0 0 0);
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boundaryField
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{
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inlet
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{
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type atmBoundaryLayerInletVelocity;
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#include "include/ABLConditions"
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value uniform (0 0 0);
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}
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ground
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{
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type noSlip;
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}
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top
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{
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// (HW:p. 365):
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// "In addition, as suggested by RH and often ignored by others, a"
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// "constant shear stress of rho*(u^*)^2 was applied at the top boundary."
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//
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// u^* ~ Uref*kappa/ln((Zref+z0)/z0)
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// (HW:Table 1):
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// Uref = 10 m/s
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// Zref = 6 m
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// z0 = 0.01 m
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// tau = rho*(u^*)^2 = 0.390796574
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type fixedShearStress;
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tau (0.390796574 0 0);
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value uniform (0 0 0);
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}
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sides
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{
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type symmetry;
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}
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outlet
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{
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type inletOutlet;
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inletValue uniform (0 0 0);
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value $internalField;
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}
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}
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// ************************************************************************* //
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