Journal ArticleDOI
Liquid Immersion Cooling of a Longitudinal Array of Discrete Heat Sources in Protruding Substrates: I—Single-Phase Convection
TLDR
In this paper, the authors investigated heat transfer from an in-line 1 x 10 array of discrete heat sources, flush mounted to protruding substrates located on the bottom wall of a horizontal flow channel.Abstract:
Experiments have been performed using water and FC-77 to investigate heat transfer from an in-line 1 x 10 array of discrete heat sources, flush mounted to protruding substrates located on the bottom wall of a horizontal flow channel. The data encompass flow regimes ranging from mixed convection to laminar and turbulent forced convection. Buoyancy-induced secondary flows enhanced heat transfer at downstream heater locations and provided heat transfer coefficients comparable to upstream values. Upstream heating extended enhancement on the downstream heaters to larger Reynolds numbers. Higher Prandtl number fluids also extended heat transfer enhancement to larger Reynolds numbers, while a reduction in channel height suppressed buoyancy driven flows, thereby reducing enhancement. The protrusions enhanced the transition to turbulent forced convection, causing the critical Reynolds number to decrease with increasing row number. The transition region was characterized by large heater-to-heater variations in the average Nusselt number.read more
Citations
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Journal ArticleDOI
Saturated flow boiling heat transfer and associated bubble characteristics of FC-72 on a heated micro-pin-finned silicon chip
TL;DR: In this paper, the effects of the mass flux, imposed heat flux, and surface micro-structures of the silicon chip on the FC-72 saturated flow boiling characteristics are examined in detail.
Journal ArticleDOI
Review of two-phase flow instabilities in macro- and micro-channel systems
Lucas E. O'Neill,Issam Mudawar +1 more
TL;DR: A systematic overview of all key two-phase instabilities focusing on the fundamental mechanisms leading to their occurrence is provided, with emphasis on how these mechanisms may change depending on whether flow may be classified as macro- or micro-channel.
Journal ArticleDOI
Boiling of saturated FC-72 on square pin fin arrays☆
TL;DR: In this paper, the effect of fin dimensions, spacing and pressure on heat transfer in saturated pool boiling was examined, in particular the effect which the non-uniform distribution of fin produces on boiling behaviour was analyzed.
Journal ArticleDOI
Experimental study of transient natural convection heat transfer from simulated electronic chips
H. Bhowmik,K.W. Tou +1 more
TL;DR: In this paper, experiments were performed using water to study the single-phase transient natural convection heat transfer from in-line four simulated electronic chips, which are flush-mounted to one wall of a vertical rectangular channel.
Journal ArticleDOI
Convection heat transfer from discrete heat sources in a liquid cooled rectangular channel
TL;DR: In this article, steady state experiments were performed to study general convective heat transfer from an in-line four simulated electronic chips in a vertical rectangular channel using water as the working fluid.
References
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Book
Convective boiling and condensation
John G. Collier,John R. Thome +1 more
TL;DR: In this paper, the basic models of two-phase flow are discussed and empirical treatments of two phase flow are provided. But the authors focus on convective boiling and condensing.
Journal ArticleDOI
A general expression for the correlation of rates of transfer and other phenomena
Stuart W. Churchill,R. Usagi +1 more
TL;DR: The expression Y = (1 + Zn)1/n where Y and Z are expressed in terms of the solutions for asymptotically large and small values of the independent variable is shown to be remarkably successful in correlating rates of transfer for processes which vary uniformly between these limiting cases as discussed by the authors.
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