A NEW BALLISTIC-DIFFUSIVE MODEL FOR HEAT PULSE PROPAGATION

被引：0

作者：

Ma, Yanbao ^{[1
]}

机构：

[1] Univ Calif Merced, Sch Engn, Merced, CA 95343 USA

来源：

PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2012, VOL 7, PTS A-D | 2013年

关键词：

Heat pulses; longitudinal waves; transverse waves; ballistic-diffusive heat transfer; second sound; dielectric crystal; SECOND SOUND; THERMAL-CONDUCTIVITY; 2ND SOUND; TRANSPORT;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, we reported a new ballistic-diffusive model for heat pulse propagation in dielectric materials. The internal energy and heat flux are split into ballistic part originating from the boundaries and diffusive part originating from inside medium. The ballistic part is modeled based on analytical solutions while the diffusive part is described by Guyer-Krumhansl equations. To validate this model, heat pulse propagation in pure NaF at low temperature is studied. The observed longitudinal waves, transverse waves, second sound waves, and diffusive waveforms from the experiments conducted in early 1970s are numerically reconstructed. There is qualitative agreement between numerical results and experimental observation.

引用

页码：2853 / 2858

页数：6

共 38 条

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