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Splatter reduction in manufacturing processes for worker health and safety

by Akhil Sharma last modified 2015-12-15 14:24

 Research Description

Splattering or splashing of jets of cutting fluids used in machining and manufacturing can lead to formation of aerosols or small liquid drops that can become carried by the air. If inhaled, these droplets can pose negative short term or long term health issues. To minimize and better control this fully, an understanding of what factors and properties that enables or contributes to splatter or splash is important. To this end, the relationship between surface wettability and threshold for splattering or splashing is being investigated. Computational modeling is being carried out to predict drop and jet impact behavior and threshold for splashing. Volume of fluid method is being employed to determine the deforming liquid-air interface, liquid pinch-off, and splatter formation. By varying the Reynolds, Weber, and Ohnesorge numbers by changing the droplet/jet diameter, impact velocity, viscosity, surface tension, as well as contact angle, the relationship of splashing threshold to liquid properties and wettability are being investigated. Regime maps of splashing versus deposition will be created that can be used by safety design engineers in practice. Engineering correlations will be developed to predict the threshold of splatter based on the Weber, Reynolds, and Ohnesorge numbers as well as the equilibrium contact angle.

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