Knudsen flow

Knudsen flow
The flow of a gas in which the mean free path of its molecules is much longer than the characteristic dimension of the tube etc that it is flowing through
Syn: free molecule flow

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  • Knudsen flow — describes the movement of fluids with a high Knudsen number, that is, where the characteristic dimension of the flow space is of the same or smaller order of magnitude as the mean free path. Separation processes using Knudsen Flow For a gas… …   Wikipedia

  • Knudsen number — The Knudsen number (Kn) is a dimensionless number defined as the ratio of the molecular mean free path length to a representative physical length scale. This length scale could be, for example, the radius of a body in a fluid. The number is named …   Wikipedia

  • Knudsen gas — A Knudsen gas is a model for gases where particle collisions are ignored, as opposed to the Lorenz gas where collisions are considered. In these gases the distance between molecules are bigger than the recipient where the gas is contained. A flow …   Wikipedia

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  • gas — gasless, adj. /gas/, n., pl. gases, v., gassed, gassing. n. 1. Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. 2. any such fluid or mixture of fluids. 3. any… …   Universalium

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  • Direct simulation Monte Carlo — (DSMC) method uses probabilistic (Monte Carlo) simulation to solve the Boltzmann equation for finite Knudsen number fluid flows. The DSMC method was proposed by Prof. Graeme Bird,[1][2][3] Emeritus Professor of Aeronautics, University of Sydney.… …   Wikipedia

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