Browse Publications Technical Papers 2005-01-2054
2005-05-10

The Use of Numerical Simulations to Perform Engineering Calculations of Window Defogging 2005-01-2054

Two simple models for the calculation of window defogging have been developed. One uses a lumped system analysis to compute the evaporation of the liquid layer, while the other uses a transient, one dimensional conduction analysis. Both use Sherwood numbers and Nusselt numbers at the liquid air interface that are calculated via a computer simulation using FLUENT. The FLUENT simulations show that steady state Sherwood and Nusselt numbers are just as valid as those calculated from a transient simulation. Results are presented in terms of evaporation rates and liquid layer decrease with time.

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