Thinning and Rupture of a Thin Liquid Film on a Heated Surface. Annual Technical Progress Report, November 1, 1991--October 31, 1992 PDF Download
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Languages : en
Pages : 9
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Book Description
Results on the dynamics and stability of thin films are summarized on the following topics: forced dryout, film instabilities on a horizontal plane and on inclined planes, instrumentation, coating flows, and droplet spreading. (DLC).
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Category :
Languages : en
Pages : 9
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Results on the dynamics and stability of thin films are summarized on the following topics: forced dryout, film instabilities on a horizontal plane and on inclined planes, instrumentation, coating flows, and droplet spreading. (DLC).
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Category : Power resources
Languages : en
Pages : 754
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Category :
Languages : en
Pages : 1190
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Author:
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Category :
Languages : en
Pages : 6
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The objective of this work continues to be the study of the dynamics, stability and rupture of thin liquid films, especially with heat and/or mass transfer. These films appear in many engineering processes, such as film coating, gas absorption, condensation, and especially cooling of hot surfaces. Surface waves may be detrimental, leading to film breakdown, with consequent equipment overheating, or beneficial, as when mass transfer coefficients are increased.
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Category :
Languages : en
Pages : 5
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The objective of this work continues to be the study of dynamics, stability, and rupture (including contact line motions) of thin liquid films, especially with heat and/or mass transfer. Following the publication of a comprehensive paper on thin-film stability and rupture, taking into account evaporation (condensation), thermocapillarity, surface tension, vapor recoil, van der Waals forces, and mass loss (gain), two follow-up papers have appeared. The first examines the conditions for a non-uniformly-heated liquid film to rupture, owing to thermocapillarity, while the second reports experimental results in excellent agreement with the theory on non-isothermal free-surface problems. Another paper extends some previous results to the case where the viscosity of the liquid is a function of temperature. By proper rescaling, it is shown that the evolution equation can be transformed into the constant-viscosity case, so that previous results can be applied directly. Another paper considers the nonlinear growth, steepening, and wavebreaking of an isothermal thin liquid film draining down an inclined plate. The competition between mean flow and evaporation gives important morphological changes that control the heat-transfer process in the wavy regime. A number of other results were obtained. 9 refs.
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Category : Science
Languages : en
Pages : 1452
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Author:
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ISBN:
Category :
Languages : en
Pages : 5
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Book Description
The objective of this work continues to be the study of dynamics, stability, and rupture (including contact line motions) of thin liquid films, especially with heat and/or mass transfer. Following the publication of a comprehensive paper on thin-film stability and rupture, taking into account evaporation (condensation), thermocapillarity, surface tension, vapor recoil, van der Waals forces, and mass loss (gain), two follow-up papers have appeared. The first examines the conditions for a non-uniformly-heated liquid film to rupture, owing to thermocapillarity, while the second reports experimental results in excellent agreement with the theory on non-isothermal free-surface problems. Another paper extends some previous results to the case where the viscosity of the liquid is a function of temperature. By proper rescaling, it is shown that the evolution equation can be transformed into the constant-viscosity case, so that previous results can be applied directly. Another paper considers the nonlinear growth, steepening, and wavebreaking of an isothermal thin liquid film draining down an inclined plate. The competition between mean flow and evaporation gives important morphological changes that control the heat-transfer process in the wavy regime. A number of other results were obtained. 9 refs.
Author: Frederick F. Simon
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Category : Distilled water
Languages : en
Pages : 42
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Category :
Languages : en
Pages : 148
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Book Description
Cincinnati Magazine taps into the DNA of the city, exploring shopping, dining, living, and culture and giving readers a ringside seat on the issues shaping the region.
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Languages : en
Pages : 9
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The objectives of this research are two-fold; one is to carry out an extensive experimental investigation of pressure drop and heat transfer for internally enhanced passages in laminar, transitional and turbulent flow. The laminar and transition regions have received very meager treatment in the past. In addition to the effects of Reynolds number and the geometric characteristics of the enhanced surfaces, a comprehensive investigation of the effect of fluid properties, which is usually expressed in terms of the Prandtl number, is one of the central features of this research program. The influence of Prandtl number on friction and heat transfer is undoubtedly the least understood because only a handful of studies considered more than one fluid. Also, there has been no consistent investigation of the Prandtl number effect for laminar or transitional flow. The second objective is to develop a general method that will aid data correlation and prediction which, in turn, will provide better understanding friction and heat transfer characteristics for smooth and enhanced passage. More specifically, the aim is to validate the frictional law of corresponding states using the present experimental data.
