...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...

... liquid films rotational flow thin films two-phase flow film cooling surface curvature mist cooling heat transfer enhancement The film cooling technique is applied in modern gas turbines to protect the components such as the turbine blades from hot combustion gases. The inlet...

... mixtures heat transfer liquid films water binary condensation ammonia–water mixtures Marangoni instabilities It is generally accepted that binary vapor condensation produces lower rates of heat transfer than those found for pure vapor condensation (Sparrow and Marschall [( 1 )], Stephan...

... fluid oscillations heat pipes heat transfer liquid films pipe flow pulsatile flow oscillating pulsating heat pipe simulation The pulsating (or oscillating) heat pipe (PHP) is a long capillary tube bent into many branches and partially filled with a two-phase, usually single...

... J. Heat Transfer 0022-1481 , 112 ( 3 ), pp. 744 – 750 . 10.1115/1.2910449 Hu , X. , and Jacobi , A. M. , 1996 , “ The Intertube Falling Film. 2. Mode Effects on Sensible Heat Transfer to a Falling Liquid Film ,” ASME J. Heat Transfer 0022-1481 , 118 ( 3 ), pp. 626 – 633...

... 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...

...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...

... 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...

... convection completely with Koh and Sparrow’s solutions shown to be merely four specific cases of the current solution. 08 12 2009 05 05 2010 27 07 2010 27 07 2010 boundary layers condensation forced convection laminar flow liquid films natural convection two-phase flow...

..., 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...

...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...

... 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...

... 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...

... 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...

... in a negative electronic disjoining pressure that overcomes the positive London dispersion disjoining pressure. As such, no steady thin-film solution is possible. 09 01 2009 07 04 2009 15 10 2009 evaporation liquid films liquid metals metallic thin films nonlinear differential...

..., 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...

... 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...

...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...

... along the wafer from the contact line, T top in the liquid region from 0   μ m (contact line) to − 250   μ m can be treated as the temperature of the wafer top surface. evaporation infrared imaging liquid films organic compounds meniscus thin liquid...

.... 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...