A molecular dynamics boundary condition for heat exchange between walls and a fluid |
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Authors: | E. A.T. van den Akker A. J.H. Frijns P. A.J. Hilbers A. A. van Steenhoven |
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Affiliation: | 1. Department of Mechanical Engineering , Eindhoven University of Technology , Eindhoven, The Netherlands e.a.t.v.d.akker@alumnus.tue.nl;3. Department of Mechanical Engineering , Eindhoven University of Technology , Eindhoven, The Netherlands;4. Department of Biomedical Engineering , Eindhoven University of Technology , Eindhoven, The Netherlands |
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Abstract: | In molecular dynamics simulations of heat transfer in micro channels, a lot of computation time is used when the wall molecules are explicitly simulated. To save computation time, implicit boundary conditions, such as the Maxwell conditions, can be used. With these boundary conditions, heat transfer is still a problem. In this work, we derive a new boundary condition based on a vibrating potential wall. The heat-transfer properties of the new boundary condition are shown to be comparable with those of the explicit wall. The computation time needed for the implicit boundary condition is very small compared with that needed for the explicit simulation. |
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Keywords: | micro/nano channel thermal boundary condition molecular dynamics |
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