Abstract
The paper analyzed the effects of sand grain diameters and volume fractions on the mass transferring from the water-liquid to the water-vapor in a two-dimensional nozzle. Based on the mixture model, k–ɛ turbulence model and Schnerr-Sauer cavitation model, the solid-liquid-vapor three phases’ cavitation flows were simulated. When the grain mean diameters were defined as constants, volume fractions were changed to investigate the effects of them. The grain mean diameters were 0.013mm, 0.025mm and 0.05mm. Volume fractions were 0.02, 0.04, 0.05, 0.07 and 0.10. Results indicated that cavitation occurred at the beginning spots of the narrow part of the nozzle, low pressure regions. With the different grain mean diameters and volume fractions, effects of the sand on the mass transferring from the water-liquid to the water-vapor were diverse, proved by the curves of the cavitation numbers with the volume fractions of the sand and the curves of the volume fractions of the water-vapor with the volume fractions of the sand, reflecting the distinctions of interactions between the bubbles and the sand grains.
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