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非傅立叶热现象的理论分析和实验证实

蒋方明; 刘登瀛; 蔡睿贤   

  1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O.Box2706, Beijing
    1000801 China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-12-28 发布日期:2001-12-28
  • 通讯作者: 蒋方明

Theoretical Analysis and Experimental Evidence of NonFourier Heat Conduction Behavior

JIANG Fangming; LIU Dengying; CAI Ruixian   

  1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O.Box2706, Beijing
    1000801 China
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-12-28 Published:2001-12-28
  • Contact: JIANG Fangming

摘要: This paper consists of two parts. (1) For a hollow sphere with sudden temperature changes
on its inner and outer surfaces, the hyperbolic heat conduction equation is employed to
describe this extreme thermal case and an analytical expression of its temperature
distribution is obtained. According to the expression, the non-Fourier heat conduction
behavior that will appear in the hollow sphere is studied and some qualitative conditions
that will result in distinct non-Fourier behavior in the medium is ultimately attained. (2)
A novel experiment to observe non-Fourier heat conduction behavior in porous material
(mainly ordinary duplicating paper) heated by a microsecond laser pulse is presented. The
conditions for observing distinct non-Fourier heat conduction behavior in the experimental
sample agree well with the theoretical results qualitatively.

关键词: 非傅立叶热现象;理论分析;实验研究;双曲线热传导;热波;化工热力学

Abstract: This paper consists of two parts. (1) For a hollow sphere with sudden temperature changes
on its inner and outer surfaces, the hyperbolic heat conduction equation is employed to
describe this extreme thermal case and an analytical expression of its temperature
distribution is obtained. According to the expression, the non-Fourier heat conduction
behavior that will appear in the hollow sphere is studied and some qualitative conditions
that will result in distinct non-Fourier behavior in the medium is ultimately attained. (2)
A novel experiment to observe non-Fourier heat conduction behavior in porous material
(mainly ordinary duplicating paper) heated by a microsecond laser pulse is presented. The
conditions for observing distinct non-Fourier heat conduction behavior in the experimental
sample agree well with the theoretical results qualitatively.

Key words: non-Fourier heat conduction, hyperbolic heat conduction, thermal wave