tke#
- metpy.calc.tke(u, v, w, perturbation=False, axis=- 1)#
Compute turbulence kinetic energy.
Compute the turbulence kinetic energy (e) from the time series of the velocity components.
- Parameters
u (array-like) – The wind component along the x-axis
v (array-like) – The wind component along the y-axis
w (array-like) – The wind component along the z-axis
perturbation (bool, optional) – True if the u, v, and w components of wind speed supplied to the function are perturbation velocities. If False, perturbation velocities will be calculated by removing the mean value from each component.
axis (int) – The index of the time axis. Default is -1
- Returns
array-like – The corresponding turbulence kinetic energy value
See also
get_perturbation
Used to compute perturbations if perturbation is False.
Notes
Turbulence Kinetic Energy is computed as:
\[e = 0.5 \sqrt{\overline{u^{\prime2}} + \overline{v^{\prime2}} + \overline{w^{\prime2}}},\]where the velocity components
\[u^{\prime}, v^{\prime}, u^{\prime}\]are perturbation velocities. For more information on the subject, please see [Garratt1994].