منابع مشابه
Gas-kinetic scheme for rarefied flow simulation
For increasingly rarefied flowfields, the predictions from continuum formulation, such as the Navier–Stokes equations lose accuracy. These inaccuracies are attributed primarily to the linear approximations of the stress and heat flux terms in the Navier– Stokes equations. The inclusion of higher order terms, such as Burnett, or high-order moment equations, could improve the predictive capabilit...
متن کاملMesoscopic Simulation of Rarefied Gas Flow in Porous Media
The accurate description of flow in nano-scale pores or channels is very important for the reliable design of materials and processes in the areas of MEMS, mesoporous media, and vacuum technologies. Use of classical flow equations fails in this regime since the continuum assumption is not valid. This is due to the fact that the mean free path is comparable to the characteristic dimensions of th...
متن کاملNumerical Investigation of Shock Tube Flow under Rarefied Conditions
Two-dimensional Direct Simulation Monte Carlo (DSMC) simulations are carried out for investigating the shock wave propagation and boundary layer effects in a shock tube flow, for a wide range of rarefied conditions. Nitrogen is used for all simulations. The Cercignani-Lampis-Lord (CLL) model of gas surface interactions is implemented to study the effects of boundary layer which develops behind ...
متن کاملExperimental and numerical modeling of rarefied gas flows through orifices and short tubes
Flow through circular orifices with thickness-to-diameter ratios varying from 0.015 to 1.2 is studied experimentally and numerically with kinetic and continuum approaches. Helium and nitrogen gases are used in the range of Reynolds numbers from 0.02 to over 700. Good agreement between experimental and numerical results is observed for mass flow and thrust corrected for the experimental facility...
متن کاملBioagent defeat in shock driven gas flow
OF THESIS Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Mechanical Engineering The University of New Mexico Albuquerque, New Mexico
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1969
ISSN: 0031-9171
DOI: 10.1063/1.1692612