Modeling of the Interaction of a Side Jet with a Rarefied Atmosphere

Gimelshein, S. F.; Alexeenko, Alina; Levin, Deborah A.

doi:10.2514/2.3814

Cited by 37 publications

(3 citation statements)

References 8 publications

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“…Third, the numerical modeling presented in this work takes into consideration the flow inside a capillary as a precursor to the flow in the low vacuum section, thus avoiding a uniform inflow approximation that may result in significant accuracy loss 17 .…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Ion Transport in an ESI-MS System

Gimelshein¹,

Gimelshein

Lilly

et al. 2014

J. Am. Soc. Mass Spectrom.

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Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Ion Transport in an ESI-MS System

Gimelshein¹,

Gimelshein

Lilly

et al. 2014

J. Am. Soc. Mass Spectrom.

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“…The direct simulation Monte Carlo (DSMC) technique is a powerful numerical method for solving rarefied gas flow problems encountered in high-altitude hypersonic aerothermodynamics, 1, 2 in-space propulsion, 3 vacuum technology, 4,5 and microsystems. 6 DSMC is a stochastic approach to solve the Boltzmann equation by simulating the motion and interaction between gas molecules based on a specified interaction potential.…”

Section: Introductionmentioning

confidence: 99%

Effect of intermolecular potential on compressible Couette flow in slip and transitional regimes

2014

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The effect of intermolecular potentials on compressible, planar flow in slip and transitional regimes is investigated using the direct simulation Monte Carlo method. Two intermolecular interaction models, the variable hard sphere (VHS) and the Lennard-Jones (LJ) models, are first compared for subsonic and supersonic Couette flows of argon at temperatures of 40, 273, and 1,000 K, and then for Couette flows in the transitional regime ranging from Knudsen numbers (Kn) of 0.0051 to 1. The binary scattering model for elastic scattering using the Lennard-Jones (LJ) intermolecular potential proposed recently [A. Venkattraman and A. Alexeenko, "Binary scattering model for Lennard-Jones potential: Transport coefficients and collision integrals for non-equilibrium gas flow simulations," Phys. Fluids 24, 027101 (2012)] is shown to accurately reproduce both the theoretical collision frequency in an equilibrium gas as well as the theoretical viscosity variation with temperature. The use of a repulsiveattractive instead of a purely repulsive potential is found to be most important in the continuum and slip regimes as well as in flows with large temperature variations. Differences in shear stress of up to 28% between the VHS and LJ models is observed at Kn=0.0051 and is attributed to differences in collision frequencies, ultimately affecting velocity gradients at the wall. For Kn=1 where the Knudsen layer expands the entire domain, the effect of the larger collision frequency in the LJ model relative to VHS diminishes, and a 7% difference in shear stress is observed.

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“…Heat-transfer experimental data [18] received by the method of two-layer thermal-indicator coating [21] confirms this conclusion. Other applications of the gas blowing include the reaction control systems [22] and a counterflow drag-reduction technique in high-speed systems [23].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer on a hypersonic sphere with gas injection

Riabov¹

2012

AIP Conference Proceedings

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The interaction of a diffusing outgas flow from a sphere nose opposing a hypersonic free stream is studied numerically using the direct simulation Monte-Carlo technique under the transitional rarefied-gas-flow regime conditions at Knudsen numbers from 0.016 to 1.5 and blowing factors from 0.15 to 1.5. Strong influences of the blowing factor (the ratio of outgas mass flux to upstream mass flux) and the Knudsen number on the flow structure about a sphere (temperature fields and the configuration of mixing flow zones) and on heat distributions along the spherical surface have been found. At large blowing factors, the injected gas significantly reduces heat flux in wide area near the spherical nose. This effect is more pronounced for light gas (helium) injection in the near-continuum flow.

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Modeling of the Interaction of a Side Jet with a Rarefied Atmosphere

Cited by 37 publications

References 8 publications

Numerical Modeling of Ion Transport in an ESI-MS System

Numerical Modeling of Ion Transport in an ESI-MS System

Effect of intermolecular potential on compressible Couette flow in slip and transitional regimes

Heat transfer on a hypersonic sphere with gas injection

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