Discussion Of 'distributed Entrainment Sink Approach For Modeling Mixing And Transport In The Intermediate Field' By K. W. Choi And J. H. W. Lee

摘要

The authors are to be congratulated for implementing an elegant solution to a problem of longstanding interest. The discusser would like to add that there have been several previous attempts to apply similar types of distributed source/sink approaches to buoyant surface discharges. For example, Watanabe and Harle-man (1975) simulated steady-state hydrothermal behavior in the surface layer of a stratified cooling pond using a two-dimensional (2D) finite-element model. They employed a plane of symmetry to model half the domain and represented the near field as a trapezoidal region that was carved out of the domain (Fig. 1). Source nodes on the long base of the trapezoid were used to supply mixed fluid to the domain, and sink nodes along the sloping side of the trapezoid were used to entrain fluid from the domain. The dilution (and hence the magnitudes of the source and sink flows) and the size and shape of the trapezoid were determined from lab experiments. Good agreement was obtained between numerically simulated and experimentally observed temperatures.