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arXiv 2011.07192math.APmath-phmath.MP
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某些非等温流体模型的温度正性

Positivity of temperature for some non-isothermal fluid models

Ning-An Lai, Chun Liu, Andrei Tarfulea

摘要:

结合能量变分法、适当的本构关系和经典热力学定律,建立了描述流体热力学的三个偏微分方程模型。此外,我们还用清晰的代数方法证明了在某些特殊条件下,绝对温度$θ$和密度$ρ$组成的量的极大最小值原理,从而证明了温度的正性.这个重要的事实意味着我们的模型的热力学一致性。

英文摘要:

We establish three partial differential equation models describing the thermodynamics of the fluid, by combining the energetic variational approach, appropriate constitutive relations, and classical thermodynamics laws. What is more, by using a clear algebraic approach, we show a maximum/minimum principle for some quantities composed by the absolute temperature $θ$ and density $ρ$ under some special conditions, which in turn gives the positivity of the temperature. This important fact implies the thermodynamic consistency for our models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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