Abstract
A numerical study is reported concerning mass transfer in the separated flow region created by an abrupt pipe expansion. Computations have employed a finite-volume method to solve the turbulent momentum equations using the k-e turbulence model. The primary focus of the study is on the simulation of the region in the immediate vicinity of the wall, which is accomplished by formulating a near-wall model for the evaluation of the mean generation and destruction rate of the e equation. The computed results were compared with the experimental data for high Schmidt number flows. The results generally showed reasonable agreement with the measurements.
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