A modal discontinuous Galerkin method for simulating dusty and granular gas flows in thermal non-equilibrium in the Eulerian framework

Ejtehadi, Omid; Myong, R.S.

doi:10.1016/j.jcp.2020.109410

Cited by 21 publications

(2 citation statements)

References 87 publications

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“…In the last decade many authors have investigated this effect using numerical techniques that focus on the entrained granular material (i.e. the grains that are kicked up from the granular surface; see [98,99]). These approaches generally rely on empirical erosion rates, which are based on laboratory experiments and analyses of previous extraterrestrial landings (e.g.…”

Section: Rocket Exhaust Impinging On Martian Soilmentioning

confidence: 99%

A coupled finite volume and material point method for two-phase simulation of liquid-sediment and gas-sediment flows

Baumgarten,

Couchman,

Kamrin

2020

Preprint

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Mixtures of fluids and granular sediments play an important role in many industrial, geotechnical, and aerospace engineering problems, from waste management and transportation (liquid-sediment mixtures) to dust kick-up below helicopter rotors (gas-sediment mixtures). These mixed flows often involve bulk motion of hundreds of billions of individual sediment particles and can contain both highly turbulent regions and static, non-flowing regions. This breadth of phenomena necessitates the use of continuum simulation methods, such as the material point method (MPM), which can accurately capture these large deformations while also tracking the Lagrangian features of the flow (e.g. the granular surface, elastic stress, etc.).Recent works using two-phase MPM frameworks to simulate these mixtures have shown substantial promise; however, these approaches are hindered by the numerical limitations of MPM when simulating pure fluids. In addition to the well-known particle ringing instability and difficulty defining inflow/outflow boundary conditions, MPM has a tendency to accumulate quadrature errors as materials deform, increasing the rate of overall error growth as simulations progress. In this work, we present an improved, two-phase continuum simulation framework that uses the finite volume method (FVM) to solve the fluid phase equations of motion and MPM to solve the solid phase equations of motion, substantially reducing the effect of these errors and providing better accuracy and stability for long-duration simulations of these mixtures.

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Section: Rocket Exhaust Impinging On Martian Soilmentioning

confidence: 99%

A coupled finite volume and material point method for two-phase simulation of liquid-sediment and gas-sediment flows

Baumgarten,

Couchman,

Kamrin

2020

Preprint

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“…technological line on the basis of classic ones or existing devices are structurally supplemented [1][2][3][4][5][6].…”

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confidence: 99%

Classification of bulk material from the gas flow in a device with coaxially arranged pipes

et al. 2020

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The paper deals with the problem of classification of bulk material, based on silica gel, larger than 30 µm, from dusty gas flow. In order to solve this problem, the design of a classifier with coaxially arranged pipes is proposed. According to the conducted studies, it is more efficient to use a classifier with an inner conical pipe to solve the problems of separating the particles from the gas flows of various sizes, since a greater value is achieved for the centrifugal, inertial, gravitational and other forces acting on the dusty flow, that contribute to knocking the particles out of its structure, than in a classifier with a cylindrical inner pipe. On average, the efficiency of a classifier with a conical inner pipe is by 35.3% higher than that of a classifier with a cylindrical inner pipe. Classification of particles of bulk material, based on silica gel, larger than 30 µm from the dusty gas flows is solved most effectively by using a classifier with a conical inner pipe and hd parameter of 50 mm and a classifier with a cylindrical inner pipe and hd parameter of –10 mm.

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Near-field plume-surface interaction and regolith erosion and dispersal during the lunar landing

et al. 2020

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A modal discontinuous Galerkin method for simulating dusty and granular gas flows in thermal non-equilibrium in the Eulerian framework

Cited by 21 publications

References 87 publications

A coupled finite volume and material point method for two-phase simulation of liquid-sediment and gas-sediment flows

A coupled finite volume and material point method for two-phase simulation of liquid-sediment and gas-sediment flows

Classification of bulk material from the gas flow in a device with coaxially arranged pipes

Near-field plume-surface interaction and regolith erosion and dispersal during the lunar landing

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