atmBoundaryLayerInletK
boundary condition provides a generalised log-law type ground-normal inlet boundary condition for the turbulent kinetic energy, i.e. k
, for homogeneous, two-dimensional, dry-air, equilibrium and neutral atmospheric boundary layer modelling.atmBoundaryLayerInletK
boundary condition inherits the traits of the atmBoundaryLayer, and inletOutlet.The ground-normal turbulent kinetic energy profile expression, i.e. k
(([99], Eq. 21), ([63], Eq. 7), ([24], Eq. 6 when C1=0 and C2=1)):
\[ k = \frac{(u^*)^2}{\sqrt{C_\mu}} \sqrt{C_1 \ln \left( \frac{z - d + z_0}{z_0} \right) + C_2} \]
where
\( k \) | = | Ground-normal turbulent kinetic energy profile [m2/s2] |
\( u^* \) | = | Friction velocity [m/s] |
\( C_\mu \) | = | Empirical model constant [-] |
\( C_1 \) | = | Curve-fitting coefficient for [99] profiles [-] |
\( C_2 \) | = | Curve-fitting coefficient for [99] profiles [-] |
Example of the boundary condition specification:
inlet { // Mandatory entries (unmodifiable) type atmBoundaryLayerInletK; // Mandatory (inherited) entries (runtime modifiable) flowDir (1 0 0); zDir (0 0 1); Uref 10.0; Zref 0.0; z0 uniform 0.1; d uniform 0.0; // Optional (inherited) entries (unmodifiable) kappa 0.41; Cmu 0.09; initABL true; phi phi; C1 0.0; C2 1.0; // Conditional mandatory (inherited) entries (runtime modifiable) value uniform 0; // when initABL=false }
where the entries mean:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type | Type name: atmBoundaryLayerInletK | word | yes | - |
The inherited entries are elaborated in:
Tutorial:
Source code:
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