Study of the combined mechanism of heat transfer and pressure drop for cryogenic solid-liquid two-phase slush fluid.

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Slush fluid, which behaves like a non-Newtonian fluid, is a two-phase, single-component fluid containing solid particles in a cryogenic liquid. Experimental tests were conducted using slush nitrogen to elucidate heat-transfer and flow characteristics of circular, square and equilateral triangular pipes, a converging-diverging pipe and a corrugated pipe according to changes in the flow velocity, solid fraction, heat flux, etc. From the experimental and numerical results, the combined mechanism of the pressure drop reduction and the heat-transfer deterioration of the slush fluid became clear.