Gas-Granular Flow Solver for Plume Surface Interaction and Cratering Simulations

Gale, Manuel; Buettner, Kevin E.; Mehta, Ranjan S.; Liever, Peter A.; Curtis, Jennifer

doi:10.2514/6.2017-4503

Cited by 18 publications

(2 citation statements)

References 20 publications

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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%

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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Section: Multiphase Flow Dynamics During Psimentioning

confidence: 99%

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

Capecelatro

2021

Preprint

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“…Two-phase flows that exhibit strong compressibility play dominant roles in nature, such as during supernovas and volcanic eruptions, in industry (coal dust explosions, shock wave lithotripsy, combustion/detonation, etc.) and space exploration (e.g., fluidization of terrestrial regolith during rocket plume-surface interactions [4,17,34]). Compared to their low-speed counterparts, particle-laden compressible flows like the examples listed here typically introduce new length-and time-scales and additional physics that further complicate modeling efforts.…”

Section: Introductionmentioning

confidence: 99%

A volume-filtered description of compressible particle-laden flows

Shallcross

Fox

Capecelatro

2020

International Journal of Multiphase Flow

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In this work, we present a rigorous derivation of the volume-filtered viscous compressible Navier-Stokes equations for disperse two-phase flows. Compared to incompressible flows, many new unclosed terms appear. These terms are quantified via a posteriori filtering of two-dimensional direct simulations of shock-particle interactions. We demonstrate that the pseudo-turbulent kinetic energy (PTKE) systematically acts to reduce the local gas-phase pressure and consequently increase the local Mach number. Its magnitude varies with volume fraction and filter size, which can be characterized using a Knudsen number based on the filter size and inter-particle spacing. A transport equation for PTKE is derived and closure models are proposed to accurately capture its evolution. The resulting set of volume-filtered equations are implemented within a highorder Eulerian-Lagrangian framework. An interphase coupling strategy consistent with the volume filtered formulation is employed to ensure grid convergence. Finally PTKE obtained from the volume-filtered Eulerian-Lagrangian simulations are compared to a series of two-and three-dimensional direct simulations of shocks passing through stationary particles.

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Modeling high-speed gas–particle flows relevant to spacecraft landings

Capecelatro

2022

International Journal of Multiphase Flow

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Gas-Granular Flow Solver for Plume Surface Interaction and Cratering Simulations

Cited by 18 publications

References 20 publications

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

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

A volume-filtered description of compressible particle-laden flows

Modeling high-speed gas–particle flows relevant to spacecraft landings

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