Results 281 to 290 of about 8,087 (328)

Experimental study of pool temperature effects on nucleate pool boiling

International Journal of Multiphase Flow, 2006
Abstract Nucleate pool boiling experiments with constant wall temperature were performed using pure R113 for subcooled, saturated, and superheated pool conditions. A microscale heater array and Wheatstone bridge circuits were used to maintain the constant wall temperature and to measure the instantaneous heat flow rate accurately with high temporal ...
Kim, JB, Oh, BD, Kim, MH
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Nucleate Pool Boiling of Binary Zeotropic Mixtures

Heat Transfer Engineering, 2004
This article deals with an experimental study of pool boiling of acetone/water and propane/isobutane zeotropic mixtures. Water and acetone form non-ideal mixtures characterized by a very wide phase equilibrium diagram. Propane and isobutane, which are alkanes with very close thermophysical properties, form nearly ideal mixtures. The whole nucleate pool
SERGE CIOULACHTJIAN, MONIQUE LALLEMAND
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The isolated bubble regime in pool nucleate boiling

International Journal of Heat and Mass Transfer, 1997
We consider an isolated bubble boiling regime in which vapour bubbles are intermittently produced at a prearranged set of nucleation site on an upward facing overheated wall plane. In this boiling regime, the bubbles depart from the wall and move as separate entities.
Buyevich, Yu. A., Webbon, B. W.
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A hydrodynamic model for nucleate pool boiling

International Journal of Heat and Mass Transfer, 1962
Abstract A hydrodynamic model of stagnation flow is proposed for saturated nucleate boiling over a flat surface. Through the established analytical results in axisymmetrical stagnation flow, a relation between the heat-transfer coefficient and the thermal boundary-layer thickness induced by rising bubbles is obtained, and a good agreement with ...
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NUCLEATE POOL BOILING OF REFRIGERANT/OIL MIXTURES

Experimental Heat Transfer, 1987
Abstract Experimental data are presented for the boiling of Refrigerant-113 and of mixtures of Refrigerant-113 and an oil (Shell Clavus-68) from horizontal electrically heated tubes. Data were obtained for both a plain tube (25.4 mm outside diameter) and a tow-finned tube having 19 fins per inch with an outside diameter of 25.4 mm and a fin route ...
K.I. Bell, G. F. Hewitt, S. D. Morris
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Nucleate Pool Boiling over Vertical Steps

Journal of Thermophysics and Heat Transfer, 1999
Nucleate subcooled pool boiling of water over vertical steps was carried out under atmospheric conditions. Two forward-facing steps of 0.8125 and 0.50 in. were considered. Data were statistically analyzed to determine samplingerror.Theebullitionwasqualitativelyexplainedintermsofthermal/e owe eldsandbubbledynamics.Plots of boiling heat e ux vs superheat
John Baker, A. K. Krishna Prasad
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Mechanisms of Steady‐State Nucleate Pool Boiling in Microgravity

Annals of the New York Academy of Sciences, 2002
Abstract:Research on nucleate pool boiling in microgravity using R‐113 as a working fluid was conducted using a five‐second drop tower and five space flights ata/g∼ 10−4. A 19 × 38‐mm flat gold film heater was used that allowed cine camera viewing both from the side and the bottom of the heater.
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Enhancement of nucleate pool boiling with polymeric additives

International Journal of Heat and Mass Transfer, 1970
Abstract Heat transfer in the nucleate pool boiling of dilute aqueous polymer solutions was measured and compared with results for pure water. Solutes were hydroxyethyl cellulose (HEC) of three molecular weights, polyacrylamide (PA) of two molecular weights, and acrylamide; solute concentrations ranged from 62 ppm to 500 ppm.
P Kotchaphakdee, Michael C Williams
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CFD modeling for nucleate pool boiling of nanofluids

Numerical Heat Transfer, Part A: Applications, 2019
AbstractBoiling is one of the most important processes in almost every industrial heat exchanger arrangement.
Ravikant R. Gupta, Somesh Bhambi, V. K. Agarwal   +2 more
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The nucleate pool boiling dilemma

Cryogenics, 1976
W.B. Bald, T-Y. Wang
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