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.
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August 2012
Research-Article
Heat Transfer at Aluminum–Water Interfaces: Effect of Surface Roughness
H. Sam Huang,
Jennifer L. Wohlwend,
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
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Ajit K. Roy
Ajit K. Roy
Thermal Sciences and Materials Branch
,Materials and Manufacturing Directorate
,Air Force Research Laboratory
,Wright Patterson AFB, OH 45433
Search for other works by this author on:
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. Aug 2012, 3(3): 031008 (6 pages)
Published Online: January 18, 2013
Article history
Received:
April 17, 2012
Revision Received:
August 3, 2012
Citation
Sam Huang, H., Varshney, V., Wohlwend, J. L., and Roy, A. K. (January 18, 2013). "Heat Transfer at Aluminum–Water Interfaces: Effect of Surface Roughness." ASME. J. Nanotechnol. Eng. Med. August 2012; 3(3): 031008. https://doi.org/10.1115/1.4007584
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