Nonequilibrium distribution of the microscopic thermal current in steady thermal transport systems

Satoshi Yukawa, Fumiko Ogushi, Takashi Shimada, Nobuyasu Ito

    研究成果: Article査読

    抄録

    Nonequilibrium distribution of the microscopic thermal current is investigated by direct molecular dynamics simulations. The microscopic thermal current in this study is defined by a flow of kinetic energy carried by a single particle. Asymptotic parallel and antiparallel tails of the nonequilibrium distribution to an average thermal current are identical to ones of equilibrium distribution with different temperatures. These temperatures characterizing the tails are dependent on a characteristic length in which a memory of dynamics is completely erased by several particle collisions. This property of the tails of nonequilibrium distribution is confirmed in other thermal transport systems. In addition, statistical properties of a particle trapped by a harmonic potential in a steady thermal conducting state are also studied. This particle feels a finite force parallel to the average thermal current as a consequence of the skewness of the distribution of the current. This force is interpreted as the microscopic origin of thermophoresis.

    本文言語English
    ページ(範囲)415-428
    ページ数14
    ジャーナルProgress of Theoretical Physics
    SUPPL. 184
    出版ステータスPublished - 2010 11 4

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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