[Gfs-devel] Gfsriver bed and free surface boundary conditions
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George Gerber
Dec 27, 2012, 1:33:14 PM12/27/12
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Good day gerris experts,
Thermal powerplant outfall eia's typically need to quantify the difference in temperature between the ambient environment and that of the discharged effluent within say 100m of the outfall. To model this problem it is necessary to impose a zero heat flux boundary condition at the bed and some sort of heat flux model at the free surface. The free surface heatflux model is often based on the difference in temperature between a specified air temperature time series and the temperature of the cell at the free surface. It would be great if the gerris developers would consider implementing these boundary conditions for gfsriver sometime in the future.
This will also allow a second mechanism to destroy a thermocline in a stratified waterbody. The first would be wind drag. The second would be due to a change in air temperature caused by night/day variations or warm/cold fronts.
Best regards,
George
Thermal powerplant outfall eia's typically need to quantify the difference in temperature between the ambient environment and that of the discharged effluent within say 100m of the outfall. To model this problem it is necessary to impose a zero heat flux boundary condition at the bed and some sort of heat flux model at the free surface. The free surface heatflux model is often based on the difference in temperature between a specified air temperature time series and the temperature of the cell at the free surface. It would be great if the gerris developers would consider implementing these boundary conditions for gfsriver sometime in the future.
This will also allow a second mechanism to destroy a thermocline in a stratified waterbody. The first would be wind drag. The second would be due to a change in air temperature caused by night/day variations or warm/cold fronts.
Best regards,
George
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