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Coupled near and far field thermal plume analysis using finite element techniques. Final report

The use of the open cycle cooling process for thermal power plants requires significant effluent discharges into aquatic environments. Both engineering and environmental considerations require accurate prediction of resulting temperature distribution in the receiving waters. Most predictive models have looked at one of two distinct regions of the discharge--the near or the far field--to the neglect of the other. A methodology is developed in this work to combine the attributes of both near and far field models. A finite element far field code is used which calculates both the circulation and heat distribution over a large area of the domain. From the far field coarse grid, a semi-circular area is removed which corresponds to the near field region of the discharge. At the new edge of the domain, which represents the near-far field boundary, mass flux and temperature boundary conditions are specified which simulate both the discharge into and entrainment out of the domain resulting from the surface discharge jet.