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Showing papers in "Experimental Thermal and Fluid Science in 1988"


Journal ArticleDOI
TL;DR: The material presented in this paper covers the method of describing the uncertainties in an engineering experiment and the necessary background material, as well as a technique for numerically executing uncertainty analyses when computerized data interpretation is involved.

6,868 citations



Journal ArticleDOI
TL;DR: In this paper, the results of other work by Achaichia and Cowell, which uses numerical methods to describe flow through louver arrays, have been used to develop a very simple non-dimensional correlating equation for Stanton number.

230 citations


Journal ArticleDOI
TL;DR: The dynamics of water drops impacting at small angles on hot surfaces were studied in this article, where experiments were conducted using a monosize droplet stream and a rotating disk, and it was observed that at small-angle impact the existence of tangential relative velocity tends to destabilize the drop.

126 citations


Journal ArticleDOI
TL;DR: In this paper, the influence of pitch on the pressure drop and heat transfer characteristics of helical coils was explored for the condition of uniform input heat flux, and two pairs of coils were tested; each pair corresponds to the same diametric ratio but substantially different pitch ratio.

79 citations


Journal ArticleDOI
TL;DR: In this paper, a combined experimental and numerical study is reported of natural convection heat transfer and fluid flow in vertical cavities filled with liquid metals, where Tin and gallium are used as the fluids inside these cavities.

46 citations


Journal ArticleDOI
TL;DR: In this paper, a detailed analysis of the effects of counter quantization errors on the measurements is presented, and the effect of the polydispersity of the scatterers is discussed.

37 citations


Journal ArticleDOI
TL;DR: In this article, four commonly used data reduction methods for predicting heat transfer coefficients from single blow experimental data are described and applied to the same experimental data, and the simplest mathematical model is used in all the methods for consistency, and experimental inlet forcing function is incorporated in the analyses.

37 citations


Journal ArticleDOI
TL;DR: In this paper, a shell-and-plate-type condenser for ocean thermal energy conversion (OTEC) plants is reported, which has the following dimensions: ratio of rib height to the equivalent diameter, ks/Deq = 2.25; length, 1450 mm; width, 235 mm; thickness, 1.0 mm; and actual total surface area is 40.7 m2.

35 citations


Journal ArticleDOI
TL;DR: In this article, the performance of shell-and-plate type evaporators for ocean thermal energy conversion (OTEC) plants is reported, and empirical correlations are proposed for predicting the boiling heat transfer and the heat transfer coefficients on the water side.

33 citations


Journal ArticleDOI
TL;DR: In this paper, an experimental study was performed to investigate the pressure drop distribution and turbulence intensity for airflow through a stack of parallel plates with periodic interruptions, where the interrupted surfaces were constructed in an offset-strip f6rm and a perforated form.

Journal ArticleDOI
TL;DR: In this paper, a series of experimental studies were made on the frequency characteristics of gas-liquid surface sloshing induced by the vertical vibration of cylindrical containers containing liquid.

Journal ArticleDOI
TL;DR: In this paper, the authors presented flow visualization photographs and measured pressure drop data for vertical two-phase flow in an adiabatic channel with offset strip fin and developed a semi-empirical superposition model of the frictional component of pressure drop in offset fin matrices.

Journal ArticleDOI
TL;DR: In this paper, an investigation of the flow behind a tube row in cross flow was carried out at a pitch-to-diameter ratio P/D = 1.3, and a complex instability of the parallel jets emerging between the tubes, leading to a joining of groups of three or more jets was observed by means of velocity traverses at various distances downstream of the tube row.

Journal ArticleDOI
TL;DR: In this article, a model for predicting single and two-phase pressure drop in wyes and tees has been developed and compared to air/water and steam/water data, and it is shown that the model previously proposed by Saba and Lahey [1] can be used to predict the observed pressure drops in tees; however, it is not always reliable for wyes.

Journal ArticleDOI
TL;DR: In this paper, a flat-louver model made of a thin bakelite plate and thin nichrome foil heaters is used to study the details of the heat transfer process in louver arrays and propose the geometrical arrangement of louvers that would most effective in improving the performance of heat exchangers.

Journal ArticleDOI
TL;DR: In this paper, a series of systematic experiments for measuring transient natural and forced convected heat fluxes in a one-sided heated vertical channel have beenconducted, and satisfactory agreements were achieved between the transient Nux predictions and experimentaldata.

Journal ArticleDOI
J. Lee1, M.T. Hyun1
TL;DR: In this article, a rectangular enclosure of aspect ratio 0.2 was used to study the convection of salt water solution due to combined horizontal temperature and concentration gradients in studies experimentally.

Journal ArticleDOI
TL;DR: In this article, the design, correction of data, and performance of a cylindrical test section prepared by inserting an electric cartridge heater into a hollow cylinder was discussed, and a quantitative rule for the design of a test section providing the most uniform boundary condition for heat transfer experiments was presented.

Journal ArticleDOI
TL;DR: In this paper, a series of out-of-pile experiments was performed using a simple cylindrical geometry to investigate the characteristics of freezing and crust formation of a melt penetrating into cold structure, and the tests were then analyzed with the multicomponent computer code BUCOGEL.

Journal ArticleDOI
TL;DR: In this article, a low-pressure-loss fluidized-bed heat exchanger with an extremely small ststic bed height of glass beads was designed to reduce the pressure loss.

Journal ArticleDOI
TL;DR: In this article, the effects of embedded longitudinal vortices on heat transfer in film-cooled turbulent boundary layers at different blowing ratios were discussed, and the results were obtained in boundary layers with free-stream velocities of 10 and 15 m/s.

Journal ArticleDOI
Sang D. Kim1, Yoon J. Lee1, Jong O. Kim1
TL;DR: In this article, a 0.142 m I.D. x 2.0 m high Plexiglas column fitted with an axially mounted cylindrical heater was used to study the heat transfer characteristics in three-phase fluidized beds of floating bubble breakers.


Journal ArticleDOI
TL;DR: In this article, a gas fluidized-bed heat exchanger with a very small static bed height has been developed for a heat-exchanging system using a low-pressure fan, which is composed of a multislit distributor, a single row of 8 mm diameter tubes, and glass beads 48-195 μm in diameter.

Journal ArticleDOI
TL;DR: In this paper, a hot-wire anemometer was used to measure the laminar-turbulent transition and separation of three-dimensional boundary layers on rotating spheres rotating in external axial flow.

Journal ArticleDOI
TL;DR: In this paper, a new method for the measurement of heat and moisture transport properties of wet porous media with a one-dimensional system subject to the Robin boundary condition is presented, where the effective thermal diffusivity, mass diffusivities, and thermo-mass diffusitudes can be measured simultaneously with the use of a highly precise digital balance, which avoids the difficulty of measuring the unsteady moisture content distributions.

Journal ArticleDOI
TL;DR: In this article, the migration of bubbles or drops in a rotating liquid-filled sphere was observed under a variety of experimental conditions, and the trajectory, final equilibrium position, and shape were compared with results of analysis.

Journal ArticleDOI
TL;DR: In this paper, experiments were performed on the condensation of steam from steam-air mixtures in annular flow at a cooled inner tube, where the dew point probe was used to measure the steam concentration inside the annulus with a newly developed dewpoint probe.

Journal ArticleDOI
TL;DR: In this paper, a high power, resistance wire heater was constructed and used to give pool boiling of methanol on a horizontal copper surface, but the life of the heaters is short.