Assessment of diffuse-interface methods for compressible multiphase fluid flows and elastic-plastic deformation in solids
نویسندگان
چکیده
This work describes three diffuse-interface methods for the simulation of immiscible, compressible multiphase fluid flows and elastic-plastic deformation in solids. The first method is localized-artificial-diffusivity approach Cook [1], Subramaniam et al. [2], Adler Lele [3], which artificial diffusion terms are added to individual phase mass fraction transport equations coupled with other conservation equations. second gradient-form that based on quasi-conservative Shukla [4], sharpening (together called regularization terms) volume [5]. third divergence-form fully conservative Jain [6], In present study, all used conjunction a four-equation, multicomponent mixture model, pressure temperature equilibria assumed among various phases. primary objective this compare these their ability to: maintain constant interface thickness throughout simulation; conserve mass, momentum, energy; accurate shape long-time integration. consistently extend model interfaces between solid materials strength. To assess methods, they simulate wide variety problems, including (1) advection an air bubble water, (2) shock interaction helium air, (3) collapse (4) Richtmyer–Meshkov instability copper–aluminum interface. current focuses comparing limit relatively coarse grid resolution, illustrates true performance methods. because it rarely practical use hundreds points resolve single or drop large-scale simulations engineering interest.
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ژورنال
عنوان ژورنال: Journal of Computational Physics
سال: 2023
ISSN: ['1090-2716', '0021-9991']
DOI: https://doi.org/10.1016/j.jcp.2022.111866