COMPUTATIONAL FLUID DYNAMICS STUDY OF INCOMPLETE AIR MIXING IN A SLOT-VENTILATED ENCLOSURE. PART II: MASS TRANSFER PROCESSES

Abstract

This article presents a computational fluid dynamics study of incomplete air mixing in a slot-ventilated enclosure. Two computational rate-of-decay tracer investigations were performed using an asymptotically consistent low-Reynolds-number k-e model. These investigations revealed that (1) incomplete mixing was caused by a quasi-sequential removal of tracer from, simultaneously involved, mixing zones, and (2) these mixing zones resulted from streamwise-convection-dominated mass transfer processes, slightly affected by turbulent diffusion, and turbulent-diffusion-dominated mass transfer processes, little modified by streamwise convection. Underventilated, well-ventilated, and overventilated flaw regions of the enclosure were also defined.

Notes

This computational work was conducted using the supercomputer at the Cornell Theory Center, Center for Theory and Simulation in Science and Engineering, which receives major funding from the National Science Foundation and the IBM Corporation, with additional support from New York State and members of the Corporate Research Institute.

Additional information

Notes on contributors

A. N. Rousseau

Address correspondence to Dr. Alain N. Rousseau, Institut National de la Recherche Scientifique, INRS-EAU, 2800 Rue Einstein, Suite 105, Case Postale 7500, Sainte-Foy, Quebec G1V 4C7, Canada.