|April 10, 2012, 02:42||
Eddy viscosity for river flows
Join Date: Apr 2012
Posts: 1Rep Power: 0
I'm very new to numerical modelling but have a relatively simple problem to get started on. The application is discharge calculation of riverflow based on HorizontalADCP data that gives velocities in a line across the river at a single depth. The data is to be extrapolated to all depths in the cross-section, then integrated to give the total flow.
The methed I'm using is given in this paper:
with finite difference solution having the following descretisation (sorry the image is not very clear):
However eddy viscosities are not made explicit in the paper, so my query is: how are the horizontal and vertical eddy viscosities (AH and AV) determined for this? I realise there are many turbulence closure solutions, but what is appropriate for this problem and relatively simple to implement?
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