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Keywords: liquid films
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Journal Articles
Article Type: Research Papers
J. Heat Transfer. February 2012, 134(2): 021801.
Published Online: December 13, 2011
...Xiaofei Wang; P. S. Hrnjak; S. Elbel; A. M. Jacobi; Maogang He Flow mode transitions for a liquid film falling over flat tubes are studied for a wide range of conditions. Hydraulic oil, ethylene glycol, ethylene-glycol-water mixtures (at three different volume ratios), and water are used as working...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. January 2012, 134(1): 011501.
Published Online: October 28, 2011
...-film model is employed for 2% mist addition. The wall-film model allows liquid droplets to deposit on the wall surface and form a liquid film based on certain criteria (surface tension, surface superheat, etc.). If the wetting criteria are not satisfied, the droplets will be reflected back from...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2011, 133(10): 101505.
Published Online: August 15, 2011
... . 10.1115/1.3244242 12 01 2010 14 04 2011 15 08 2011 15 08 2011 ammonia drops film condensation gas mixtures heat transfer liquid films water binary condensation ammonia–water mixtures Marangoni instabilities It is generally accepted that binary vapor...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2011, 133(8): 081504.
Published Online: May 4, 2011
... / ( K   m 2 ) ) V velocity ( V i of the liquid plug) (m/s) X absolute position at the x axis (m) Greek Symbols Δ difference δ f liquid film thickness (m) γ coefficient in Eq. 4 λ heat...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. May 2011, 133(5): 051501.
Published Online: January 31, 2011
.... Mode Effects on Sensible Heat Transfer to a Falling Liquid Film ,” ASME J. Heat Transfer 0022-1481 , 118 ( 3 ), pp. 626 – 633 . 10.1115/1.2822678 Liu , P. , 1975 , “ The Evaporating Falling Film on Horizontal Tubes ,” Ph.D. thesis, University of Wisconsin-Madison. Mitrovic , J...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. April 2011, 133(4): 042901.
Published Online: January 19, 2011
... oscillations laminar flow liquid films pipe flow two-phase flow film evaporation film condensation oscillating heat pipe The increased demand on high performance required by the information technology industry has raised thermal design challenges due to both increased heat dissipation from...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2010, 132(12): 121601.
Published Online: September 20, 2010
... and they scale on the thickness of the fluid layer. This investigation documents the formation of cells in the liquid film in the presence of a uniform-heat-flux lower boundary condition. Liquid crystal thermography was used to image the cells and measure the temperature distribution on the lower surface...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2010, 132(12): 122403.
Published Online: September 20, 2010
...Yaohua Zhang; Yoshio Utaka; Yuki Kashiwabara Experiments were performed using the laser extinction method to measure the thickness of the liquid film formed by growing flattened bubbles in a microchannel for gap sizes of 0.5 mm, 0.3 mm, and 0.15 mm. Water, ethanol, and toluene were used as test...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2010, 132(10): 101501.
Published Online: July 27, 2010
... convection completely with Koh and Sparrow’s solutions shown to be merely four specific cases of the current solution. boundary layers condensation forced convection laminar flow liquid films natural convection two-phase flow mixed convection film condensation noncondensables...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2010, 132(3): 031702.
Published Online: January 4, 2010
..., the boiling heat transfer of ethanol was studied. It was found that boiling with bubble growth in both upstream and downstream directions leaving behind a thin evaporating liquid film on the tube wall is the dominant phase change process. Wavy patterns on the film surface indicate shear forces between vapor...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2010, 132(3): 031603.
Published Online: December 30, 2009
...T. W. Ng; A. Narain; M. T. Kivisalu To overcome the limitations/disadvantages of many known liquid film thickness sensing devices (viz. conductivity probes, reflectance based fiber-optics probes, capacitance probes, etc.), a new liquid film thickness sensor that utilizes fluorescence phenomena...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2010, 132(3): 031501.
Published Online: December 29, 2009
... and vapor film generation on the boiling surfaces has revealed significant insights into the boiling mechanisms at low saturation pressures. 23 03 2009 17 08 2009 29 12 2009 29 12 2009 bubbles film boiling flow visualisation heat transfer liquid films natural convection...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. January 2010, 132(1): 012402.
Published Online: October 23, 2009
... performed for systems of a liquid film confined between atomistic solid walls. The two solid walls have different temperatures to generate a steady thermal energy flux in the system, which is the element of macroscopic heat conduction flux. Three kinds of liquid molecules and three kinds of solid walls...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2009, 131(12): 121007.
Published Online: October 15, 2009
..., gravity, phase change, and viscosity. The level set method is used to capture the movement of the liquid-vapor interface. The governing equations are solved using finite difference method. Spray cooling is studied using this model, where a vapor bubble is growing in a thin liquid film on a hot surface...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2009, 131(12): 121010.
Published Online: October 15, 2009
... caused by the engulfing liquid-film's collapse. Good agreement was found between these predicted time-points and measured changes in the boiling profile. This form of boiling, though being very rapid and sustaining high heat transfer rates, is still calm in nature, therefore, more predictable and widely...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2009, 131(12): 121015.
Published Online: October 15, 2009
... physical properties of different liquid metals. For liquid sodium, as an example test material, variation in the work function produces order-of-magnitude differences in the film thickness and evaporation profile. evaporation liquid films liquid metals metallic thin films nonlinear differential...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. November 2009, 131(11): 111501.
Published Online: August 26, 2009
... flow liquid films solutions film condensation similarity solution vertical plate The engineering significance of condensation heat transfer stems from Watt’s steam engine, and remains critical to power and refrigeration applications. Nusselt provided the first rigorous analytical...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2009, 131(8): 082901.
Published Online: June 5, 2009
...Yasuo Koizumi; Ryou Enari; Hiroyasu Ohtake The behavior of a liquid film that flows down countercurrently along the inner surface of a circular pipe was examined. In the experiments of the present study, silicone oils of 500 cS, 1000 cS, and 3000 cS, as well as water, were used as the liquid phase...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2009, 131(6): 061501.
Published Online: April 2, 2009
.... evaporation infrared imaging liquid films organic compounds meniscus thin liquid film evaporation diffusion triple line Evaporation from a meniscus serves as the basic mechanism in many two-phase cooling devices such as heat pipes, thermosyphons, vapor chambers, two-phase cold plates...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. January 2009, 131(1): 011602.
Published Online: October 22, 2008
.... This paper numerically investigates the EHD-conduction pumping of a liquid film in the presence of evaporation. The flow system comprises a liquid film flowing over a two-dimensional flat plate. The vapor phase above the flat plate is extended far beyond the interface. The channel is separated into four...