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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >USING AMORPHOUS MATERIAL PROPERTIES IN SCATTERING-MEDIATED ACOUSTIC MISMATCH MODEL FOR PREDICTING THERMAL BOUNDARY RESISTANCE
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USING AMORPHOUS MATERIAL PROPERTIES IN SCATTERING-MEDIATED ACOUSTIC MISMATCH MODEL FOR PREDICTING THERMAL BOUNDARY RESISTANCE

机译：在散射介导的声不匹配模型中使用非晶态材料特性预测热边界电阻

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摘要

Solid-solid thermal boundary resistance (R_b) plays an important role in determining the heat flow between materials. The acoustic mismatch model (AMM) and the diffuse mismatch model (DMM), work pretty well in describing and predicting the thermal energy transport at solid-solid interface at very low temperatures (in the range of few Kelvin). At moderate cryogenic temperatures they do not perform that well, and the reason may be attributed to the dominance of scattering in determining R_b. Scattering mediated acoustic mismatch model (SMAMM) was developed on this principle. Though SMAMM works well, it has some fundamental problems. SMAMM's assumption of U-processes, for amorphous layer formed between materials, is physically unexplainable. It also assumes unrealistically small scattering time. We propose a modified version of SMAMM called Amorphous SMAMM, which takes into account amorphous material properties for the interstitial layer formed, to find the scattering time to be used in SMAMM. This model performs better than all the models in the range of 25 to 60 K in predicting R_b. Above this temperature, original SMAMM performs better, but Amorphous SMAMM always performs better than the AMM. Amorphous SMAMM does not run into any physical problems with the assumptions made, hence the results have a better physical significance than SMAMM's.
机译：固-固热边界电阻（R_b）在确定材料之间的热流方面起着重要作用。声学失配模型（AMM）和扩散失配模型（DMM）在描述和预测在非常低的温度下（在很少的开尔文范围内）在固-固界面处的热能传输时，效果很好。在适中的低温下，它们的性能不佳，其原因可能归因于确定R_b时散射的优势。散射介导的声失配模型（SMAMM）就是基于这一原理而开发的。尽管SMAMM运作良好，但存在一些基本问题。对于材料之间形成的非晶层，SMAMM关于U加工的假设在物理上无法解释。它还假设散射时间不切实际。我们提出了一种称为无定形SMAMM的SMAMM修改版本，该模型考虑了所形成的间隙层的非晶材料特性，以找到要在SMAMM中使用的散射时间。在预测R_b方面，该模型的性能优于25至60 K范围内的所有模型。在此温度以上，原始SMAMM的性能会更好，但非晶SMAMM的性能始终会优于AMM。进行假设时，非晶SMAMM不会遇到任何物理问题，因此，结果比SMAMM具有更好的物理意义。

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