Gas-nanoparticle scattering: a molecular view of momentum accommodation function |
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Authors: | Li Zhigang Wang Hai |
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Institution: | Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, USA. |
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Abstract: | We examine the origin of diffuse gas-particle scattering by molecular dynamics simulation and show that diffuse scattering is the consequence of gas molecule trapping on the particle surface. Trapping occurs because of gas-particle interactions and the particle's ability of energy accommodation. These observations explain the transition from specular-to-diffuse scattering as the particle size becomes larger than the molecular size. We discuss the implication of this transition on the transport properties of nanometer-size particles. |
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