Prediction of liquid superheat around spherical bubbles

Conference · Fri Nov 01 04:00:00 EST 1996

OSTI ID:392466

Martin-Dominguez, I R ^[1]; McDonald, T W ^[2]

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1. Inst. Tecnologico de Durango (Mexico). Dept. de Metal-Mecanica
2. Univ. of Windsor, Ontario (Canada). Dept. of Mechanical Engineering

The vapor pressure in a bubble is dependent upon the surrounding liquid pressure, the surface tension of the fluid, and the radius of curvature of the liquid/vapor interface. Since the bubble saturation temperature, and hence the surrounding liquid temperature, is above the liquid saturation temperature, the liquid is referred to as superheated. The superheat is usually related to the vapor/liquid pressure difference by integrating the Clapeyron equation. When this integration is carried out by assuming some or all of the integrand to be constant, significant errors can occur in the superheat prediction for bubbles smaller than 1 {micro}m. A curve fit of saturation temperature vs. pressure data is shown to be a much simpler and accurate method of determining the liquid superheat required for equilibrium.

• OSTI ID: 392466
• Report Number(s): CONF-960254--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BUBBLE GROWTH
BUBBLES
HEAT TRANSFER
LIQUIDS
NUCLEATE BOILING
SUPERHEATING
THERMODYNAMICS
TWO-PHASE FLOW