pydune.physics.turbulent_flow.geometrical_model.Ax_geo#
- Ax_geo(alpha, A0)[source]#
Calculate the hydrodynamic coefficient \(\mathcal{A}_{x}\) using the geometrical model:
\[\mathcal{A}_{x} = \mathcal{A}_{0}\cos^{2}\alpha.\]- Parameters:
alpha (array, scalar) – Dune orientation with respect to the perpendicular to the flow direction (in degree).
A0 (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