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    • Henry Weller's avatar
      ENH: atmosphericModels: Added Lopes da Costa porosity and turbulence models · c812b4c6
      Henry Weller authored
      Specialized variants of the power law porosity and k epsilon turbulence models
      developed to simulate atmospheric flow over forested and non-forested complex
      terrain.
      
      Class
          Foam::powerLawLopesdaCosta
      
      Description
          Variant of the power law porosity model with spatially varying
          drag coefficient
      
          given by:
      
              \f[
                  S = -\rho C_d \Sigma |U|^{(C_1 - 1)} U
              \f]
      
          where
          \vartable
              \Sigma | Porosity surface area per unit volume
              C_d    | Model linear coefficient
              C_1    | Model exponent coefficient
          \endvartable
      
          Reference:
          \verbatim
              Costa, J. C. P. L. D. (2007).
              Atmospheric flow over forested and non-forested complex terrain.
          \endverbatim
      
      Class
          Foam::RASModels::kEpsilonLopesdaCosta
      
      Description
          Variant of the standard k-epsilon turbulence model with additional source
          terms to handle the changes in turbulence in porous regions represented by
          the powerLawLopesdaCosta porosity model.
      
          Reference:
          \verbatim
              Costa, J. C. P. L. D. (2007).
              Atmospheric flow over forested and non-forested complex terrain.
          \endverbatim
      
          The default model coefficients are
          \verbatim
              kEpsilonLopesdaCostaCoeffs
              {
                  Cmu         0.09;
                  C1          1.44;
                  C2          1.92;
                  sigmak      1.0;
                  sigmaEps    1.3;
              }
          \endverbatim
      
      Tutorial case to follow.
      c812b4c6
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