arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.12793math.AP
收藏

导热系数随温度变化的一维可压缩扩散界面模型的整体强解

Global Strong Solution to a Thermodynamic Compressible Diffuse Interface Model with Temperature Dependent Heat-conductivity in 1-D

Yazhou Chen, Qiaolin He, Bin Huang, Xiaoding Shi

摘要:

本文研究了导热系数与温度的正次方成正比的非等熵可压缩Navier-Stokes/Allen-Cahn方程组的适定性。该系统描述了两相不混溶导热粘性可压缩混合物的流动。由于流体中密度的变化,允许相收缩或生长,并将它们的运输与电流结合起来。我们建立了该系统在1-D中整体强解的存在性和唯一性,这意味着在有限时间内不会出现相分离、真空、激波、质量或热量或相浓度,尽管两相不混溶流的运动具有大的振荡,流体动力学效应和相场效应之间的相互作用是复杂的.我们的结果可以看作是Kazhikhov-Shelukhin结果([Kazhikhov-Shelukhin. J.Appl.Math.Mech.41(1977)]),将具有常导热系数的可压缩单相流问题转化为具有简并非线性导热系数的非等熵可压缩不混溶两相流问题。

英文摘要:

In this paper, we investigate the wellposedness of the non-isentropic compressible Navier-Stokes/Allen-Cahn system with the heat-conductivity proportional to a positive power of the temperature. This system describes the flow of a two-phase immiscible heat-conducting viscous compressible mixture. The phases are allowed to shrink or grow due to changes of density in the fluid and incorporates their transport with the current. We established the global existence and uniqueness of strong solutions for this system in 1-D, which means no phase separation, vacuum, shock wave, mass or heat or phase concentration will be developed in finite time, although the motion of the two-phase immiscible flow has large oscillations and the interaction between the hydrodynamic and phase-field effects is complex. Our result can be regarded as a natural generalization of the Kazhikhov-Shelukhin's result ([Kazhikhov-Shelukhin. J. Appl. Math. Mech. 41 (1977)]) for the compressible single-phase flow with constant heat conductivity to the non-isentropic compressible immiscible two-phase flow with degenerate and nonlinear heat conductivity.

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。

↑