0
Research Papers

Heat Transfer at Aluminum–Water Interfaces: Effect of Surface Roughness

[+] Author and Article Information
H. Sam Huang

e-mail: hsengji.huang.ctr@wpafb.af.mil

Jennifer L. Wohlwend

Thermal Sciences and Materials Branch,
Materials and Manufacturing Directorate,
Air Force Research Laboratory,
Wright Patterson AFB, OH 45433;
Universal Technology Corporation,
1270 North Fairfield Road,
Dayton, OH 45432

Ajit K. Roy

Thermal Sciences and Materials Branch,
Materials and Manufacturing Directorate,
Air Force Research Laboratory,
Wright Patterson AFB, OH 45433

Manuscript received April 17, 2012; final manuscript received August 3, 2012; published online January 18, 2013. Assoc. Editor: Debjyoti Banerjee.

J. Nanotechnol. Eng. Med 3(3), 031008 (Jan 18, 2013) (6 pages) doi:10.1115/1.4007584 History: Received April 17, 2012; Revised August 03, 2012

In this paper, we studied the effect of microscopic surface roughness on heat transfer between aluminum and water by molecular dynamic (MD) simulations and macroscopic surface roughness on heat transfer between aluminum and water by finite element (FE) method. It was observed that as the microscopic scale surface roughness increases, the thermal boundary conductance increases. At the macroscopic scale, different degrees of surface roughness were studied by finite element method. The heat transfer was observed to enhance as the surface roughness increases. Based on the studies of thermal boundary conductance as a function of system size at the molecular level, a procedure was proposed to obtain the thermal boundary conductance at the mesoscopic scale. The thermal boundary resistance at the microscopic scale obtained by MD simulations and the thermal boundary resistance at the mesoscopic scale obtained by the extrapolation procedure can be included and implemented at the interfacial elements in the finite element method at the macroscopic scale. This provides us a useful model, in which different scales of surface roughness can be included, for heat transfer analysis.

FIGURES IN THIS ARTICLE
<>
Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Aluminum blocks and water blocks for nonequilibrium MD simulations

Grahic Jump Location
Fig. 2

Schematics of DSR

Grahic Jump Location
Fig. 3

Temperature profile of system 1 at steady state

Grahic Jump Location
Fig. 4

Thermal boundary conductance against DSR

Grahic Jump Location
Fig. 5

Thermal resistance against reciprocal of the system size for the extraction of mesoscale thermal conductance

Grahic Jump Location
Fig. 6

Meshes of five systems used to study the effects of surface roughness at the macroscopic scale

Grahic Jump Location
Fig. 7

Temperature contours of the five systems

Grahic Jump Location
Fig. 8

Heat flux contours of five systems

Grahic Jump Location
Fig. 9

Thermal boundary resistance against (reciprocal of system size and DSR)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In