Results 231 to 240 of about 3,077,819 (277)

Simulation of rarefied vapor flows

Industrial & Engineering Chemistry Research, 1991
The vapor region between evaporator and condenser surfaces of different areas is examined by direct Monte Carlo simulation of multicomponent, high-vacuum distillation. Vapor profiles change sharply through the kinetic layer next to the evaporator and again through that next to the ...
Maruti Bhandarkar, John R. Ferron
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Computation of Transitional Rarefied Flow

1991
Rarefied flows around reentry vehicles can be evaluated by using a Monte-Carlo numerical simulation. Results for Hermes vehicle are presented and agree fairly well with wind-tunnel data.
F. Coron, J. P. Pallegoix
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Higher-order effects in rarefied channel flows

Physical Review E, 2008
The regularized 13 moment (R13) equations and their boundary conditions are considered for plane channel flows. Chapman-Enskog scaling based on the Knudsen number is used to reduce the equations. The reduced equations yield second-order slip conditions, and allow us to describe the characteristic dip in the temperature profile observed in force driven ...
Henning, Struchtrup, Manuel, Torrilhon
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Phenomenology of Rarefied Gas Flows

1991
Abstract Until now we have been concerned only with phenomena in a dilute gas, which means that we have neglected all effects of boundaries and boundary layers.
Frederick R W Mccourt, Jan J M Beenakker, Walter E Kohler, Ivan Kuscer   +3 more
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Flow of Rarefied Gas over Plane Wall

The Physics of Fluids, 1970
Flow of rarefied gas over an infinite plane wall on the basis of a relaxation model of the Boltzmann equation is considered. The solution is obtained in the form: Hilbert solution and boundary layer term which is appreciable only in a thin layer (with thickness of order of the mean free path) adjacent to the boundary.
Sone, Yoshio, Yamamoto, Kyoji
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Computation of rarefied hypersonic flows

2008
Numerical techniques for the simulation of hypersonic flows of rarefied gases are examined in an analytical review. The direct-simulation Monte Carlo (DSMC) method developed to interpret measurement data obtained by the Space Shuttle in the SUMS project is described; the fundamental limitations of the DMSC approach are discussed; and modifications to ...
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Interferometry in Rarefied Gas Flows

1993
A survey is given on optical interferometry using a Wollaston prism differential interferometer. With a number of selected examples, its potential, especially in the field of low density flow diagnostics, is demonstrated. In the first part, differential interferometry with spark light sources is treated and is shown to be a very effective means for ...
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On the Rarefied Gas Flow in Pipes

Volume 6: 5th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A, B, and C, 2005
Rarefied gas flow in a pipe is treated in the paper by modeling the slip boundary condition by means of a fractional derivative. At that the order of the derivative is conveniently chosen to be a function of the average value of the Knudsen number so that the entire Knudsen number range, from continuum flow to free molecular flow, is covered. Very good
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Drag coefficients in rarefied flow [PDF]

The X1 expansion tube of the Centre for Hypersonics at the University of Queensland has developed and studied a test facility for hypervelocity rarefied flow. Dr. Macrossan has proposed the approximate theory of the drag of a blunt body in rarefied flow which is a modification of Whitfield’s theory (Macrossan, 2002b).
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Flow of Rarefied Gas past a Liquid Sphere

AIAA Journal, 1992
The author considers a perfectly spherical drop that is placed in the unbounded slow flow of rarefied gas in the near-continuum regime. In comparison with the flow past a solid sphere, the flow under consideration is solved taking into account the internal circulating motion of the liquid itself induced by the frictional forces acting at the sphere ...
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