Results 191 to 200 of about 622 (248)

Mechanism for Nucleation Jet Enhancement of Nucleate Pool Boiling

Journal of Enhanced Heat Transfer, 2007
The very high heat transfer rates in nucleate pool boiling are due to the rapid vapor bubble formation and departure from the heated surface. This paper presents observations and analyses of high-frequency bubble departures from very thin wires. The analysis shows that the bubbles entrained in experimentally observed nucleation jets were already at the
H. Wang, D. M. Christopher
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Heat transfer and nucleation in pool-boiling

International Journal of Thermal Sciences, 2006
Abstract The creation of bubbles is a fundamental process in boiling heat transfer. There must be a correlation between heat transfer and bubble action. In order to find out more about it a number of tubes of different materials, diameters and surface finish were investigated and their heat transfer coefficients were determined.
Erich Hahne, Gerrit Barthau
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Behavior of nucleation sites in pool boiling

AIChE Journal, 1985
AbstractThe behavior of active boiling site populations was monitored for pool boiling on an electrically heated 1‐mil stainless steel sheet. The boiling sites were located using a high‐speed infrared camera focused on the underside of the boiling surface. Experiments were conducted to determine factors affecting the origin, concentration, and lifetime
J. E. Sgheiza, J. E. Myers
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NUCLEATE POOL BOILING IN A CONFINED SPACE

Chemical Engineering Communications, 1992
Nucleate pool boiling of pure water and dilute aqueous sodium lauryl sulfate (SLS) solutions within a confined space between heated and unheated horizontal-parallel surfaces has been investigated under atmospheric pressure. The electrically heated lower surface is made of a sheet of stainless steel 304 with the dimension of 145 × 22 × 0.05 mm and the ...
MAW TIEN LEE, YU MIN YANG, JER RU MAA
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Theory of nucleate pool boiling

International Journal of Heat and Mass Transfer, 1965
Abstract It is assumed in the following study that the heat flux in boiling heat transfer consists of three components: the first due to the flow of columns of bubbles; the second due to the molecular heat conduction in the liquid; and the third is due to the eddy convection. The latter is estimated from the data on the bubbling process.
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On the dynamics of nucleate region pool boiling

Nuclear Engineering and Design, 1975
Abstract A transfer function to describe pool boiling dynamics was previously developed analytically. Dynamic measurements were performed and a transfer function for nucleate boiling was obtained based on experimental results. The transfer function contained an exponential delay term and for this reason was in many cases inconvenient to use.
W.C. Peterson, M.G. Zaalouk, S.I. Güçeri   +2 more
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NUCLEATE POOL BOILING ON POROUS METALLIC COATINGS

Proceedings of the International Thermal Science Seminar Bled. Volume 1, 2000
The results of systematic experimental investigations of the heat transfer to distilled water in saturated pool boiling at atmospheric pressure are reported. The tests were conducted using stainless steel tubes of various diameters heated electrically and flat horizontal plates.
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Stability of nucleation sites in pool boiling

Experimental Thermal and Fluid Science, 1994
Abstract A study was carried out to observe bubble nucleation and site deactivation mechanisms under equilibrium pool boiling of liquids on single sites. The experiments were conducted with benzene, ethanol, and their mixtures on single sites made of glass.
Keshav Kant, Martin E. Weber
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CONVECTIVE CURRENTS IN NUCLEATE POOL BOILING

Chemical Engineering Communications, 1982
Abstract An experimental investigation was conducted to examine the effects of convection currents in nucleate pool boiling and to determine the changes in critical heat flux caused by varying the diameter of horizontal flat plate heating surfaces. Trichlorotrifluoroethane (Freon 113) was boiled from flat circular copper surfaces at one atmosphere ...
P.S. MORFORD, A.D. MESSINA
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Nucleate Pool Boiling

1975
The process of evaporation associated with vapor bubbles in a liquid is called nucleate boiling. Here attention will be focused on boiling at heated solid surfaces of interest in engineering applications.
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