Direct simulation of condensation in a one-dimensional unsteady expansion: Microscopic mechanisms

Jiaqiang Zhong; Michael I. Zeifman; Deborah A. Levin

doi:10.1063/1.2145748

Direct simulation of condensation in a one-dimensional unsteady expansion: Microscopic mechanisms

Jiaqiang Zhong, Michael I. Zeifman, Deborah A. Levin

Research output: Contribution to journal › Article › peer-review

Abstract

We apply a molecular dynamics (MD) technique to the simulation of a quasi-one-dimensional unsteady free expansion to determine the dominant microscopic mechanisms of condensation in supersonic flows. In this way, it is possible to reproduce the basic physics of the coupled condensation flow with a moderate computational effort. The MD results confirm that the fundamental mechanism for the initiation of condensation is through dimer formation in two-stage ternary collisions of monomers.

Original language	English (US)
Article number	128102
Pages (from-to)	1-4
Number of pages	4
Journal	Physics of fluids
Volume	17
Issue number	12
DOIs	https://doi.org/10.1063/1.2145748
State	Published - Dec 2005
Externally published	Yes

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1063/1.2145748

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abstract = "We apply a molecular dynamics (MD) technique to the simulation of a quasi-one-dimensional unsteady free expansion to determine the dominant microscopic mechanisms of condensation in supersonic flows. In this way, it is possible to reproduce the basic physics of the coupled condensation flow with a moderate computational effort. The MD results confirm that the fundamental mechanism for the initiation of condensation is through dimer formation in two-stage ternary collisions of monomers.",

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note = "Funding Information: The authors wish to express their gratitude to Professor L. V. Zhigilei for providing the computer code. This work was supported by the Air Force Office of Scientific Research Grant No. F49620-02-1-0104, administered by Dr. Mitat Birkan, and the Army Research Office Grant No. DAAD19-02-1-0196, administered by Dr. David Mann.",

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AU - Levin, Deborah A.

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PY - 2005/12

Y1 - 2005/12

N2 - We apply a molecular dynamics (MD) technique to the simulation of a quasi-one-dimensional unsteady free expansion to determine the dominant microscopic mechanisms of condensation in supersonic flows. In this way, it is possible to reproduce the basic physics of the coupled condensation flow with a moderate computational effort. The MD results confirm that the fundamental mechanism for the initiation of condensation is through dimer formation in two-stage ternary collisions of monomers.

AB - We apply a molecular dynamics (MD) technique to the simulation of a quasi-one-dimensional unsteady free expansion to determine the dominant microscopic mechanisms of condensation in supersonic flows. In this way, it is possible to reproduce the basic physics of the coupled condensation flow with a moderate computational effort. The MD results confirm that the fundamental mechanism for the initiation of condensation is through dimer formation in two-stage ternary collisions of monomers.

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Direct simulation of condensation in a one-dimensional unsteady expansion: Microscopic mechanisms

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