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Interferometry in Rarefied Gas Flows
1993A 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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Flow of Rarefied Gas past a Liquid Sphere
AIAA Journal, 1992The 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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Cylindrical Poiseuille Flow of a Rarefied Gas
The Physics of Fluids, 1966The Poiseuille flow of a rarefied gas in a cylindrical tube is analyzed numerically for an inverse Knudsen number ranging from 0–10. The Bhatnagar, Gross, and Krook model is used and the transport integro-differential equation is reduced to a purely integral one, which is solved numerically. The plot of the volume flow rate versus the pressure is shown
Carlo Cercignani, Franco Sernagiotto
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Similarity of Microscale and Rarefied Gas Flows
ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B, 2005The similarity between micro gas flow and rarefied gas flow was numerically investigated using a DSMC method. With compressibility and rarefaction effects, the similarity parameters are the Mach number and the Knudsen number, since the Reynolds number is dependent on the Mach number and the Knudsen number for an ideal gas.
Xudong Lan, Zhixin Li, Moran Wang
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Flow of a Rarefied Gas through a Cylindrical Tube
The Physics of Fluids, 1967The problem of Poiseuille flow through a cylindrical tube previously solved numerically by Cercignani is attacked analytically. The integral equation for the velocity as a function of radius is cast into a convenient form and its solution is obtained in limiting cases. For large Knudsen number a solution is obtained by Neumann series. For small Knudsen
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Internal Rarefied Gas Flows with Backscattering
The Physics of Fluids, 1972A modification of the boundary condition describing the interaction between a gas molecule and a wall is proposed for use in the calculation of internal rarefied gas flows. The effect of the altered boundary condition on a number of flows of interest is calculated.
Abraham S. Berman, Wendel J. Maegley
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Some Studies on Rarefied Gas Flows
Journal of the Physical Society of Japan, 1966This paper deals with the Knudsen layers in Rayleigh shear flow and other related flows of rarefied gas. A matching procedure is presented by which the outer solution for continuum regime and the solution for the Knudsen layer are determined simultaneously. Numerical discussions are made of the flow velocity and shear stress.
Kō Tamada, Yoshio Sone
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Construction and testing of a rarefied gas flow facility
1967A low-density gasdynamic facility, suitable for measurement of mass flow through small (approximately 1 mm diameter) nozzles, tubes, and orifices, was designed and constructed. The system is capable of producing and measuring mass flows at 100:1 upstream/downstream pressure ratios for the entire spectrum from continuum to free molecular flow.
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Rarefied Gas Flow Around a 3D-Deltawing
1991This paper presents numerical results for hypersonic flows around a 3D-deltawing at a low Knudsen number. The underlying body geometry as well as the physical parameters correspond to testcase 7.2.1. of the workshop. The numerical method used for the calculations is the Finite-Pointset-Method (FPM) developed at the University of Kaiserslautern since ...
F. Gropengieβer +3 more
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Simulations of rarefied gas flows
2013The new generation of Lithography equipment of ASML uses rarefied gas flows in order to keep the mirrors from blackening. These flows cannot be modeled by conventional computational fluid dynamics based on the Navier-Stokes, NS, equation, because the continuum approach is no longer valid.
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