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RE: Spatially-varying Dispersion Coefficient

PE
Paul Evans, modified 3 Years ago.

Spatially-varying Dispersion Coefficient

Youngling Posts: 3 Join Date: 1/7/16 Recent Posts
Hi there,

I am trying to spatially-vary my dispersion coefficient (Eddy Diffusivity) in D-FLOW so I can calibrate my HD model against salinity, but I can only seem to spatially-vary the Eddy Viscosity.

Does anyone know how to do this, or know of a workaround?

Many thanks in advance.

Paul
MN
Mohamed Nabi, modified 3 Years ago.

RE: Spatially-varying Dispersion Coefficient

Youngling Posts: 1 Join Date: 7/1/16 Recent Posts
Paul Evans:
Hi there,

I am trying to spatially-vary my dispersion coefficient (Eddy Diffusivity) in D-FLOW so I can calibrate my HD model against salinity, but I can only seem to spatially-vary the Eddy Viscosity.

Does anyone know how to do this, or know of a workaround?

Many thanks in advance.

Paul


The eddy diffusivity is the eddy viscosity divided by Prandtle-Smith number. As the Prandtle-Smith number is constant, you can take the eddy viscosity and divide it by this constant. The value of this number for salinity is 0.7.