Analytical study of heat transfer rates for parallel flow of liquid metals through tube bundles: II

AIChE Journal ◽  
1961 ◽  
Vol 7 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Aaron J. Friedland ◽  
Charles F. Bonilla
Keyword(s):  
Heat Transfer ◽  
Analytical Study ◽  
Liquid Metals ◽  
Parallel Flow ◽  
Transfer Rates ◽  
Tube Bundles

Analytical study of heat transfer for liquid metals in a turbulent tube flow

2021 ◽  
Vol 373 ◽  
pp. 111030
Author(s):  
Yaou Shen ◽  
Shinian Peng ◽  
Mingyu Yan ◽  
Yu Zhang ◽  
Jian Deng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Analytical Study ◽  
Liquid Metals ◽  
Tube Flow ◽  
Turbulent Tube Flow

Numerical Simulations for Digitized Heat Transfer

2009 ◽  
Author(s):  
Eric Baird ◽  
Kamran Mohseni
Keyword(s):  
Heat Transfer ◽  
Thermal Management ◽  
Liquid Metals ◽  
Heat Removal ◽  
Heat Sinks ◽  
Management Technique ◽  
High Power Density ◽  
Transfer Rates ◽  
Integrated Microsystems ◽  
High Degree

This paper presents estimates of heat removal capabilities of a Digitized Heat Transfer (DHT) cooled device, a novel active thermal management technique for high power density electronics and integrated microsystems. In DHT, thermal energy is transported by a discrete array of electrostatically activated microdroplets of liquid metals, alloys or aqueous solutions with the potential of supporting significantly higher heat transfer rates than classical air-cooled heat sinks. Actuation methods for dispensing and transporting individual fluid slugs with a high degree of precision and programmability are described, and numerical results for the amount of heat flux removal a DHT device can obtain are presented.

Laminar Natural Convection Heat Transfer From a Horizontal Circular Cylinder to Liquid Metals

1991 ◽  
Vol 113 (1) ◽  
pp. 91-96 ◽  
Author(s):  
K. Sugiyama ◽  
Y. Ma ◽  
R. Ishiguro
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Circular Cylinder ◽  
Liquid Metals ◽  
Convection Heat Transfer ◽  
Boussinesq Approximation ◽  
Large Temperature ◽  
Transfer Rates ◽  
Laminar Natural Convection ◽  
Horizontal Circular Cylinder

The objective of the present study is to clarify the heat transfer characteristics of natural convection around a horizontal circular cylinder immersed in liquid metals. Experimental work concerning liquid metals sometimes involves such a degree of error that it is impossible to understand the observed characteristics in a measurement. Numerical analysis is a powerful means to overcome this experimental disadvantage. In the present paper we first show that the Boussinesq approximation is more applicable to liquid metals than to ordinary fluids and that the present analysis gives accurate heat transfer rates, even for a cylinder with a relatively large temperature difference (>100 K) between the heat transfer surface and fluid. It is found from a comparison of the present results with previous work that the correlation equations that have already been proposed predict values lower than the present ones.

Analytical study of heat transfer from circular cylinder in liquid metals

2006 ◽  
Vol 42 (11) ◽  
pp. 1017-1023 ◽  
Author(s):  
W. A. Khan ◽  
J. R. Culham ◽  
M. M. Yovanovich
Keyword(s):  
Heat Transfer ◽  
Circular Cylinder ◽  
Analytical Study ◽  
Liquid Metals

Electrowetting Droplet Manipulation for Application in Thermal Management of Compact Microsystems

2006 ◽  
Author(s):  
Kamran Mohseni ◽  
Eric Baird
Keyword(s):  
Heat Transfer ◽  
Substrate Temperature ◽  
Liquid Metals ◽  
Heat Sinks ◽  
Active Management ◽  
Management Technique ◽  
Transfer Rates ◽  
Electrowetting On Dielectric ◽  
Micro Systems ◽  
High Degree

Digitized heat transfer (DHT), a novel active management technique for high power density electronic and integrated micro systems in which heat is transported by a discrete array of electrostatically activated microdroplets, is proposed. Liquids, especially liquid metals or alloys, support significantly higher heat transfer rates than classical air-cooled heat sinks; in addition, discrete microdroplets are shown to be actuated and controlled with a high degree of precision and programmability. As a consequence, DHT is a viable new alternative for achieving the most important objectives of electronic cooling, i.e., minimization of the maximum substrate temperature, reduction of the substrate temperature gradient and removal of substrate hot spots. Three methods of microdroplet actuation, electrowetting on dielectric (EWOD), dielectrophoresis (DEP), and continuous electrowetting (CEW), are described, with simple results for steady state velocities in terms of known parameters. The use of EWOD to transport a droplet of commercially available liquid metal is reported. In addition, preliminary considerations on the heat transfer rates of such droplets are presented, with a simple analysis leading to a generalization of the continuous Nusselt number to a discretized flow.

Sign in / Sign up

Export Citation Format

Share Document