Molecular group dynamics study on slip flow of thin fluid film based on the Hamaker hypotheses

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ZHOU JianFeng
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1 * SHAO ChunLei 已出版文章查询
SHAO ChunLei
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1 GU BoQin 已出版文章查询
GU BoQin
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1ZHOU JianFeng* SHAO ChunLei GU BoQin


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The thin fluid film was assumed to consist of a number of spherical fluid molecular groups and the attractive forces of molecular group pairs were calculated by the derived equation according to the three Hamaker homogeneous material hypotheses. Regarding each molecular group as a dynamics individual, the simulation method for the shearing motion of multilayer fluid molecular groups, which was initiated by two moving walls, was proposed based on the Verlet velocity iterative algorithm. The simulations reveal that the velocities of fluid molecular groups change about their respective mean velocities within a narrow range in steady state. It is also found that the velocity slips occur at the wall boundary and in a certain number of fluid film layers close to the wall. Because the dimension of molecular group and the number of group layers are not restricted, the hypothetical thickness of fluid film model can be enlarged from nanometer to micron by using the proposed simulation method.

DOI: http://dx.doi.org/10.1007/s11431-010-3105-6%3e

语种: 英文   

基金This work was supported by the National Natural Science Fo...

关键词Hamaker hypotheses molecular group velocity slip Lennard-Jones potential


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