Fluid density effects in supersonic jet-induced cratering in a granular bed on a planetary body having an atmosphere in the continuum regime

Balakrishnan, Kaushik; Bellan, Josette

doi:10.1017/jfm.2021.29

Cited by 18 publications

(2 citation statements)

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“…Inter-particle forces arising from collisions and sliding/rolling friction vary based on the physical properties of the regolith. In recent years, Eulerian-based two-fluid models (Gale et al, 2017;Balakrishnan and Bellan, 2018;Gale et al, 2020;Balakrishnan and Bellan, 2019;Chinnappan et al, 2021;Balakrishnan and Bellan, 2021) and particle-based methods (He et al, 2012;Morris et al, 2015;Rahimi et al, 2020;Shallcross, 2021) of PSI have been conducted that explicitly account for these interactions. Yet, the underlying models these simulations are built upon (e.g., drag, subgrid scale turbulence, etc.)…”

Section: Multiphase Flow Dynamics During Psimentioning

confidence: 99%

“…Because the Archimedes force is proportional to the density ratio, these issues are more prevalent in bubbly as compared to gas-particle flows. Balakrishnan and Bellan (2021) analyzed the hyperbolicity of a compressible two-fluid model for simulations of supersonic jet-induced cratering on a granular bed. It was found that the system is hyperbolic in most regions except in the vicinity of the crater, particularly where the particle compaction is high (φ p > 0.6).…”

Section: Ill-posedness and Hyperbolicitymentioning

confidence: 99%

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Modeling high-speed gas-particle flows relevant to spacecraft landings: A review and perspectives

Capecelatro

2021

Preprint

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The interactions between rocket exhaust plumes and the surface of extraterrestrial bodies during spacecraft landings involve complex multiphase flow dynamics that pose significant risk to space exploration missions. The two-phase flow is characterized by high Reynolds and Mach number conditions with particle concentrations ranging from dilute to close-packing. Low atmospheric pressure and gravity typically encountered in landing environments combined with reduced optical access by the granular material pose significant challenges for experimental investigations. Consequently, numerical modeling is expected to play an increasingly important role for future missions. This article presents a review and perspectives on modeling high-speed disperse two-phase flows relevant to plume-surface interactions (PSI). We present an overview of existing drag laws, with origins from 18th-century cannon fire experiments and new insights from particle-resolved numerical simulations. While the focus here is on multiphase flows relevant to PSI, much of the same physics are shared by other compressible gas-particle flows, such as coal-dust explosions, volcanic eruptions, and detonation of solid material.

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