rarefied gas flows
On the apparent permeability of porous media in rarefied gas flows
... apparent gas permeability of a porous medium is an important parameter in the prediction of unconventional gas production, which was first investigated systematically by Klinkenberg in 1941 and found to ...
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A multi-level parallel solver for rarefied gas flows in porous media
... modeling rarefied gas flows has been ...modeling flows in porous media thanks to easy implementation of boundary condition on complex surfaces ...media flows in the transition and ...
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Comparative study of the discrete velocity and lattice Boltzmann methods for rarefied gas flows through irregular channels
... for rarefied gas flows through rough sur- face and complex porous media, the MRT-LBM should not be viewed as an accurate ...media flows in the framework of the MRT-LBM, due to its simplicity ...
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Numerical simulation of rarefied gas flows with specified heat flux boundary conditions
... In this paper, we report numerical investigations of rarefied gas flows confined be- tween two parallel infinite plates. We solve the Shakhov model (S model) of the Boltz- mann equation [19, 20]. ...
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Comparative study of the discrete velocity and the moment method for rarefied gas flows
... A detailed comparison for expanded VDFs in different order of Hermite polynomials has been given in Figure 3 with different Kn numbers. When Kn 1.0 , the reconstructed VDFs can give a relatively accurate predict in ...
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Accuracy analysis of high-order lattice Boltzmann models for rarefied gas flows
... Rarefied gas flows have recently attracted significant research interest due to the rapid development of micro/nano-fluidic ...describe gas flows is the Navier Stokes equations, which ...
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Molecular dynamics studies of anomalous transport in rarefied gas flows
... simulate rarefied gas flows, the open source software OpenFOAM (Open Field Operation and Manipulation) [6] is used with the molecular dynamics routines implemented by Macpherson et ...noble ...
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Recent Progress on Supercomputer Modelling of High-Speed Rarefied Gas Flows Using Kinetic Equations
... external rarefied gas flows at high-speed (M ∞ ≥ 10) ...high-speed flows over convex body there appears strong non-equilibrium boundary layer, it is important to use the so-called kinetic ...
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Lattice Boltzmann simulation of rarefied gas flows in microchannels
... For gas flows in microchannels, slip motion at the solid surface can occur even if the Mach number is negligibly ...the gas flow in a long microchannel can vary from 0 to ...simulate rarefied ...
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A comparative study of discrete velocity methods for low-speed rarefied gas flows
... rarefied gas dynamics, the discrete velocity method (DVM) has been widely employed to solve the gas kinetic ...unified gas-kinetic scheme (DUGKS) are analysed in finding steady-state so- lutions of the ...
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Influence of intermolecular potentials on rarefied gas flows : fast spectral solutions of the Boltzmann equation
... HS gas reaches ...HS gas and Xe at the wall are reduced to ...HS gas and Xe is only ...HS gas model can be safely used, with a numerical error of less than two ...
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Effects of curvature on rarefied gas flows between rotating concentric cylinders
... The gas flow between two concentric rotating cylinders is considered in order to investigate non-equilibrium effects associated with the Knudsen layers over curved ...
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Rarefied Poiseuille Flow in a Circular Tube
... isothermal rarefied gas flow through a long circular tube due to longitudinal pressure gradient (a three-dimensional Poiseuille problem) was studied using the linearized Bhatnagar-Gross-Krook model kinetic ...
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Sound propagation through a rarefied gas in rectangular channels
... of rarefied gas flows is important for a broad range of industrial applications, and has attracted signif- icant attention due to the rapid development of micro- electromechanical systems (MEMS) ...
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Oscillatory rarefied gas flow inside a three dimensional rectangular cavity
... of rarefied gas flows, ...of gas resonance and ...highly rarefied flows, which are in reasonable agreement with the theoretical ...of gas resonance and ...
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Comparing macroscopic continuum models for rarefied gas dynamics : a new test method
... We propose a new test method for investigating which macroscopic continuum models, among the many existing models, give the best description of rarefied gas flows over a range of Knudsen numbers. The ...
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Evaporation boundary conditions for the R13 equations of rarefied gas dynamics
... The regularized 13 moment (R13) equations are a macroscopic model for the description of rarefied gas flows in the transition regime. The equations have been shown to give meaningful results for ...
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The velocity boundary condition at solid walls in rarefied gas calculations
... in rarefied gases ...for rarefied gas flows at solid ...a rarefied gas could slide over a surface [2] and b) that inequalities in temperature could give rise to a force tending ...
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Flows of a Rarefied Gas between Coaxial Circular Cylinders with Nonuniform Surface Properties
... slow rarefied gas flows between coaxial circular cy- linders with nonuniform surface properties on the basis of kinetic ...three flows are studied: 1) a flow caused by the rotation of the ...
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Nonlinear oscillatory rarefied gas flow inside a rectangular cavity
... of rarefied gas flows in respectively high-speed and low-speed flow ...oscillatory gas flows in the transition regime ...of gas molecules, respectively, resulting in an extremely ...
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