pydune.physics.turbulent_flow.geometrical_model.By_geo#

By_geo(alpha, B0)[source]#

Calculate the hydrodynamic coefficient \(\mathcal{B}_{y}\) using the geometrical model:

\[\mathcal{B}_{y} = 0.5*\mathcal{B}_{0}\cos\alpha\sin\alpha\]
Parameters:

  • alpha (array, scalar) – Dune orientation with respect to the perpendicular to the flow direction (in degree).

  • B0 (array, scalar) – value of the hydrodynamic coefficient for \(\alpha = 0\), i.e. for a dune orientation perpendicular to the flow direction.

Returns:

the hydrodynamic coefficient.

Return type:

array, scalar