Key structural characteristics of porous layers in diffusion modelling: A study on polydispersity, shape, and hierarchy

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Planetary and Space Science Pub Date : 2025-03-15 DOI:10.1016/j.pss.2025.106078

Volodymyr Reshetnyk , Igor Luk’yanyk , Yuri Skorov , Yevgen Grynko , Wolfgang Macher , Christian Schuckart , Yuhui Zhao , Jürgen Blum

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Abstract

In this study, we explored various open-source models for generating porous media. These models enabled us to examine different types of porous beds, including layers of polydisperse spheres with various size distributions, layers of porous aggregates – either fragments of parent porous layers or those formed during the agglomeration of polydisperse spheres – and layers of non-spherical particles with both regular and random shapes. Through extensive simulations, we derived estimates for the averaged structural characteristics of the model layers. These estimates will be utilized in macroscopic models to study heat diffusion and the sublimation of products in the near-surface layer of a cometary nucleus. Our findings revealed significant differences between the obtained estimates and those previously made for layers of monodisperse spheres, underscoring the importance of this research. We also compared numerical results with theoretical formulas for layers of monodisperse spheres.

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research