The thermal behavior of a gas confined between two parallel walls is investigated. Wall effects such as hydrophobic or hydrophilic wall interactions are studied, and the effect on the heat flux and other characteristic parameters such as density and temperature is shown. For a dilute gas, the dependence on gas-wall interactions of the temperature profile between the walls for the incident and reflected molecules is obtained using molecular dynamics (MD). From these profiles, the effective accommodation coefficients for different interactions and different mass fluid/wall ratio are derived. We show that Monte Carlo (MC) with Maxwell boundary conditions based on the accommodation coefficient gives good results for heat flux predictions when compared with pure molecular dynamics simulations. We use these effective coefficients to compute the heat flux predictions for a dense gas using MD and MC with Maxwell-like boundary conditions.
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Micro/Nanoscale Heat Transfer—Part I
Heat Transfer Predictions for Micro-/Nanochannels at the Atomistic Level Using Combined Molecular Dynamics and Monte Carlo Techniques
S. V. Nedea,
S. V. Nedea
Department of Mechanical Engineering, Energy Technology,
e-mail: s.v.nedea@tue.nl
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
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A. J. Markvoort,
A. J. Markvoort
Department of Biomedical Engineering, BioModeling and BioInformatics,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
Search for other works by this author on:
A. A. van Steenhoven,
A. A. van Steenhoven
Department of Mechanical Engineering, Energy Technology,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
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P. A. J. Hilbers
P. A. J. Hilbers
Department of Biomedical Engineering, BioModeling and BioInformatics,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
Search for other works by this author on:
S. V. Nedea
Department of Mechanical Engineering, Energy Technology,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlandse-mail: s.v.nedea@tue.nl
A. J. Markvoort
Department of Biomedical Engineering, BioModeling and BioInformatics,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
A. A. van Steenhoven
Department of Mechanical Engineering, Energy Technology,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
P. A. J. Hilbers
Department of Biomedical Engineering, BioModeling and BioInformatics,
Eindhoven University of Technology
, P. O. Box 513, 5600 MB, Eindhoven, The NetherlandsJ. Heat Transfer. Mar 2009, 131(3): 033104 (8 pages)
Published Online: January 21, 2009
Article history
Received:
September 25, 2007
Revised:
September 15, 2008
Published:
January 21, 2009
Citation
Nedea, S. V., Markvoort, A. J., van Steenhoven, A. A., and Hilbers, P. A. J. (January 21, 2009). "Heat Transfer Predictions for Micro-/Nanochannels at the Atomistic Level Using Combined Molecular Dynamics and Monte Carlo Techniques." ASME. J. Heat Transfer. March 2009; 131(3): 033104. https://doi.org/10.1115/1.3056592
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