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Tuesday, July 28, 2020 | History

2 edition of Experimental scaling study of an annular flow ice-water heat sink found in the catalog.

Experimental scaling study of an annular flow ice-water heat sink

John M. Stubstad

Experimental scaling study of an annular flow ice-water heat sink

by John M. Stubstad

  • 230 Want to read
  • 9 Currently reading

Published by Dept. of Defense, Dept. of the Army, Corps of Engineers, Cold Regions Research and Engineering Laboratory in Hanover, N.H .
Written in English

    Subjects:
  • Heat -- Transmission.,
  • Heat storage devices -- Mathematical models.,
  • Ice.,
  • Underground construction.

  • Edition Notes

    StatementJohn M. Stubstad and William F. Quinn ; Cold Regions Research and Engineering Laboratory.
    SeriesCRREL report ; 77-15, CRREL report -- 77-15.
    ContributionsQuinn, William F., Cold Regions Research and Engineering Laboratory (U.S.), United States. Army Facilities Engineering Support Agency.
    The Physical Object
    Paginationvii, 54 p. :
    Number of Pages54
    ID Numbers
    Open LibraryOL17817693M

    Conference: Numerical and Experimental Studies of Ultra Low Profile Three-dimensional Heat Sinks (3DHS) Made using a Novel Manufacturing Approach. Numerical and Experimental Studies of Ultra Low Profile Three-dimensional Heat Sinks (3DHS) Made. Abstract. This study examines some physical mechanisms which impose limits on the possible existence of two-phase flow in a horizontal pipe. With the aid of this analysis and the use of the Martinelli variable, X, a method is developed which determines the range of possible void fractions for a given two-phase flow.

    In such microgap channels Annular flow - associated with the presence of a thin liquid layer flowing along the outer wall of the channel and a vapor core in the center - has been found to be the dominant flow regime. Bar-Cohen has co-authored Design and Analysis of Heat Sinks Such experimental studies also brought to the fore the. This paper focuses on the progress of research made during the last decade regarding heat transfer and fluid flow in microheat sinks, micropumps, microturbines, microengines, micromixers, as well as microsensors. Recent experimental techniques in the thermal microelectromechanical systems (MEMS) field have also been presented.

    Siamack A. Shirazi is a Professor of Mechanical Engineering and the Director of the Erosion/Corrosion Research Center (E/CRC) at The University of Tulsa (TU) and Director of TU Sand Management Projects (TUSMP) in addition to some other petroleum engineering consortia at TU that he has contributed and co-founded. Professor Shirazi has over publications, technical [ ]. [ Topic-wise Listing | Profile at GoogleScholar and ResearcherID. ] Text Book Narasimhan, A., (), "Essentials of Heat and Fluid Flow in Porous Media," Ane Books (Indian Edition) and CRC Press, Taylor and Francis Group, NY. [Book Details] Invited Book Chapters Narasimhan, A., (), "Convection in Bi-Disperse Porus Media," Ch. 8, in Convective Heat Transfer.


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Experimental scaling study of an annular flow ice-water heat sink by John M. Stubstad Download PDF EPUB FB2

Get this from a library. Experimental scaling study of an annular flow ice-water heat sink. [John M Stubstad; William F Quinn; United States. Army Facilities Engineering Support Agency.; Cold Regions Research and Engineering Laboratory (U.S.)]. An analytical and laboratory experimental study was conducted on a scale model annular flow ice-water heat sink which represent a medium for storing waste heat developed by a hardened defense installation during a transient period in which it operates on a closed cycle system.

The study developed (1) an understanding of the flow processes and melting patterns in such a sink, (2) Author: James L. Brown, William F. Quinn. In the part II of this study, an annular flow model is developed to describe flow boiling in the saturated region of the micro-channel heat sink, which provides an alternative theoretical means to predicting the heat transfer by: Heat exchangers.

In an experimental thermohydraulic facility, heat exchangers are key components, acting as final heat sink, internal recuperator, or a test section itself for detailed measurements. At KIT, several facilities include liquid-metal-to-liquid-metal, liquid-metal-to-air, and/or liquid-metal-to-oil heat exchangers.

Zhang et al. [10] performed an experimental study of flow boiling of FC for three different orientations of a microchannel heat sink: vertical up-flow, vertical down-flow, and horizontal flow. Fig. 1(a) illustrates the general hydrodynamic characteristics of annular flow in a two-phase micro-channel heat sink.

The vapor phase flows along the center of the channel as a continuous vapor core. The liquid phase is comprised of two portions: a thin annular film along the channel wall, and droplets that are entrained in the vapor core.

This study investigates the heat transfer characteristics of aluminum-foam heat sinks with restricted flow outlets under impinging-jet flow conditions. An annular flow-restricting mask is used to control the height of the flow outlet of the aluminum foam sink, forcing the cooling air to reach the heat.

Understanding the flow boiling phenomena in microchannel heat sink experimentally and analytically has been topic of intense research in twenty first century. In this review paper, the experimental studies on flow visualization, pressure drop and heat transfer characteristics of microchannels presented by different researchers are summarized.

[4] W. Qu and I. Mudawar, “Flow boiling heat transfer in two-phase m icro-channel heat sinks-I. Experimental investiga tion and assessment of correlation m ethods,” Int.

Heat Mass Transf. Some researchers studied flow boiling in small scale channels and reported contradictions regarding the effect of heat and mass fluxes. Tran et al. performed an experimental study on flow boiling of R12 in a rectangular channel with the hydraulic diameter of mm.

They stated that heat transfer coefficient increased with increasing heat flux. An experimental study of saturated flow boiling in a high-aspect-ratio one-side-heating rectangular microchannel was conducted with de-ionized water as the working fluid.

ZnO micr. An experimental investigation of flow boiling heat transfer in a copper multi-microchannel heat sink with a hydraulic diameter of mm is described in this paper. The annular test sections were constructed with an annular gap of 2 mm and an internal heater of 8 mm outer diameter. Experimental parameter covered pressures of 23 and 25 MPa, mass fluxes of and kg/m 2 s, and heat fluxes of – kW/m 2.

Experimental data were acquired from downward flow and upward flow, respectively. Request PDF | On Jan 7,Yuling Zhai and others published Experimental investigation and empirical correlations of single and laminar convective heat transfer in microchannel heat sinks.

Prediction of heat transfer coefficient in annular flow regime for flow boiling in a horizontal micro tube at a uniform heat flux Younes, A., Kadem, L. & Hassan, I., 1 Jan2nd International Conference on Fluid Flow, Heat and Mass Transfer, FFHMT Avestia Publishing.

Experimental results are presented and discussed to optimize the microgap heat sink dimension and flow condition based on two-phase flow boiling heat transfer and pressure drop characteristics in.

The problem of flow maldistribution is very critical in microchannel heat sinks (MCHS). It induces temperature nonuniformity, which may ultimately lead to the breakdown of associated system. In the present communication, a novel approach for the mitigation of flow maldistribution problem in parallel MCHS has been proposed using variable width.

A review of the experimental studies on two-phase flow boiling and heat transfer in small flow passages was presented. Some experimental results published in the year – were overviewed, revealing some controversial conclusions on micro-scale flow boiling heat transfer mechanisms.

The entrance region constitutes a considerable fraction of the channel length in miniaturized devices. Laminar slip flow in microchannel plate fin heat sinks under hydrodynamically developing conditions is investigated semi-analytically and numerically in this paper. The semi-analytical model for the pressure drop of microchannel plate fin heat sinks is obtained by solving the momentum.

Abstract: This chapter presents the unified modeling suite for annular two-phase flow that the authors have and continue to develop. The annular flow suite includes models to predict the void fraction, the entrained liquid fraction, the wall shear stress and an algebraic turbulence model for momentum and heat transport inside the annular liquid film.

This book comprises select proceedings of the International Conference on Future Learning Aspects of Mechanical Engineering (FLAME ). The book gives an overview of recent developments in the field of thermal and fluid engineering, and covers theoretical and experimental fluid dynamics, numerical methods in heat transfer and fluid mechanics, different modes of heat transfer, multiphase.

Gas-liquid two-phase flow can be found in petroleum, chemistry, nuclear power, aerospace and other industries (Xue et al., Xue, Y., Tianyou, S., Li, H., and Liao, C., “ Experimental investigation on flow patterns and frictional pressure drop of downward air-water two-phase flow in vertical pipes,” Proceedings of the Asme Summer Heat Transfer Conference, 2 ()[email protected]{osti_, title = {Two-phase flow and heat transfer}, author = {Butterworth, D.

and Hewitt, G.F.}, abstractNote = {Introductory and advanced level information for graduate engineers and scientists on liquid-gas and liquid-vapor flow and heat transfer are presented.

The topics discussed include: phase distribution; methods for calculating the pressure gradient; mechanisms for.