Effect of Baffle Opening Position to the Flow Distribution in a Servco Fume Cupboard

Abstract

From the computational fluid dynamics (CFD) simulation of Servco fume cupboard using κ-ω turbulence model, it is found that recirculation region behind the sash is the potential contributor to the leakage of the contaminants due to its large size. To have a good fume cupboard, the recirculation zone needs to be minimised while maintaining the flow distributions to all area in the fume cupboard. The opening on the baffle may reduce the recirculation zone which in turn may reduce back flow that can be the cause of leakage. In this paper, the effect of baffle openings on flow distributions of a Servco fume cupboard will be presented as a result of computational fluid dynamics (CFD) simulation using κ-ω turbulence model. The results are presented in terms of magnitude of curl of velocity vectors Vxyzat different cross sections of the fume cupboard for 4 variations of location of baffles opening.