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- W2788762731 abstract "In this paper, we consider mathematical modeling and numerical simulation of non-isothermal compressible multi-component diffuse-interface two-phase flows with realistic equations of state. A general model with the general reference velocity is derived rigorously through thermodynamical laws and Onsager’s reciprocal principle, and it is capable of characterizing compressibility and partial miscibility between multiple fluids. We prove a novel relation between the pressure, temperature and chemical potentials, which results in a new formulation of the momentum conservation equation indicating that the gradients of chemical potentials and temperature become the primary driving force of the fluid motion except for the external forces. A key challenge in numerical simulation is to develop entropy stable numerical schemes preserving the laws of thermodynamics. Based on the convex–concave splitting of Helmholtz free energy density with respect to molar densities and temperature, we propose an entropy stable numerical method, which solves the total energy balance equation directly, and thus, naturally satisfies the first law of thermodynamics. Unconditional entropy stability (the second law of thermodynamics) of the proposed method is proved by estimating the variations of Helmholtz free energy and kinetic energy with time steps. Numerical results validate the proposed method." @default.
- W2788762731 created "2018-03-06" @default.
- W2788762731 creator A5045760110 @default.
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- W2788762731 date "2018-11-01" @default.
- W2788762731 modified "2023-10-18" @default.
- W2788762731 title "Entropy stable modeling of non-isothermal multi-component diffuse-interface two-phase flows with realistic equations of state" @default.
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- W2788762731 doi "https://doi.org/10.1016/j.cma.2018.06.002" @default.
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