Effect of dispersed particulate or droplet phase on the Rayleigh-Taylor instability of a gas-liquid interface. [LMFBR]

Technical Report · Mon Mar 01 04:00:00 EST 1982

OSTI ID:5274226

Moszynski, J R; Ginsberg, T

The growth of Rayleigh-Taylor instabilities is studied in relation to liquid entrainment at the interface between accelerating fluids of unequal density. The upper fluid is pure liquid, and the lower fluid is a mixture of vapor and a heavy dispersed droplet or particulate phase. Entrainment through this mechanism would occur when the liquid spikes grow into the lower fluid and, eventually, separate into droplets. This work estimates the effect of the presence of heavy droplets or particulates in the immediate vicinity of the interface on the early (linear) stages of instability growth. The growth of the Taylor instability is computed using a porous medium model of the multi-phase lower fluid, which assumes that the dispersed phase is characterized by infinite inertia. The vapor simply flows around the dispersed phase. The model is described and calculation results are presented for the rate of instability growth during HCDA bubble expansion. Results are compared with the classical Taylor theory which neglects the presence of the dispersed phase, and with a homogeneous model of the multi-phase bubble.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5274226
• Report Number(s): NUREG/CR-2688; BNL-NUREG-51533; ON: DE82017150
• Country of Publication: United States
• Language: English

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