A push-pull fume cupboard shown is an innovative device to remove pollutants from a fume cupboardto the outdoor environment. A push flow coming from the bottom of a sash and a pull flow behind thedoorsill are adopted to form an air curtain in the fume cupboard. Meanwhile, the roof of a push-pullfume cupboard is open to the environment and ambient fluids are drawn from the roof. To investigatethe performance of a push-pull fume cupboard, a numerical model based on the finite volume methodis utilized. Various ratios of push flows to pull flows are considered.
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