Turbulent diffusion

[paulo.chambel.maretec@taguspark.pt]

Paulo,
I would like to know how in the mohid the diffusion coeffcient of each water property is defined in the water properties module.

Nuno Vaz

[paulo.chambel.maretec@taguspark.pt]

Dear Nuno,
the diffusion coefficient for each water property in the horizontal (Kh) is computed in the follow way:

Kh = Vh * Schmidt_NumberH

in the vertical (Kv):

Kv = Vv * Schmidt_NumberV + Molecular Diffusion

Vh - horizontal turbulent viscosity
Vv - vertical turbulent viscosity
Vh and Vv are defined in the input data file of the turbulence module

Schmidt_NumberH, Schmidt_NumberV and Molecular Diffusion are defined for each water property in the input data file of the WaterProperties module by the follow keywords:
SCHMIDT_BACKGROUND_V (Molecular Diffusion )
SCHMIDT_NUMBER_H
SCHMIDT_NUMBER_V

Paulo