rarefied gas
Thermal Electromagnetic Radiation of Rarefied Gas
... of rarefied gas in gas laser [2], particles in plasma, phonons in crystals, ...ideal gas molecules by the speeds (or their kinetic energy) is carried out with the help of Boltzmann kinetic ...
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A multi-level parallel solver for rarefied gas flows in porous media
... high-performance gas kinetic solver using multi-level parallelization is developed to enable pore-scale simulations of rarefied flows in porous ...of rarefied gas flows in porous media based ...
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Continuum and kinetic simulations of heat transfer through rarefied gas in annular and planar geometries in the slip regime
... Used nuclear fuel assemblies consists primarily of square arrays of zircaloy cladding tubes containing highly-radioactive solids and gases [1]. They are initially stored underwater while their heat generation and ...
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Effects of curvature on rarefied gas flows between rotating concentric cylinders
... certain rarefied conditions the flow between the cylinders can exhibit highly non- intuitive ...a rarefied gas and demonstrated that velocity inversion could occur provided the tangential momentum ...
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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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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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Comparative study of the discrete velocity and lattice Boltzmann methods for rarefied gas flows through irregular channels
... Therefore, for rarefied gas flows through rough sur- face and complex porous media, the MRT-LBM should not be viewed as an accurate method. Possible reasons for the failure of the MRT-LBM include (i) the ...
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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 to make ...
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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 gas is ...
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Nonlinear oscillatory rarefied gas flow inside a rectangular cavity
... One of the features of the oscillatory cavity flow is that the damping force exerted on the oscillating lid has local dips and peaks when the oscillation frequency changes. This is due to the antiresonance and resonance ...
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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 Knudsen ...
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Ideal gas approximation for a two-dimensional rarefied gas under Kawasaki dynamics
... ideal gas approximation is far from ...saturated gas at the condensation ...stable gas so rarefied that it behaves like an ideal gas up to very large ...a rarefied gas, ...
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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 merits ...
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Flows of a Rarefied Gas between Coaxial Circular Cylinders with Nonuniform Surface Properties
... a rarefied gas have wide applications, ...a rarefied gas flow is that the transports of mass and energy are strongly coupled due to the nonequilibrium ...the gas simultaneously with the ...
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Accuracy analysis of high-order lattice Boltzmann models for rarefied gas flows
... in rarefied flows, especially at ...for rarefied gas ...for rarefied gas dynamics, we will also analyze the similarities and differences between the LB method and the discrete velocity ...
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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]. While one ...
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Recent Progress on Supercomputer Modelling of High-Speed Rarefied Gas Flows Using Kinetic Equations
... supersonic rarefied flow of argon over circular cylinder, using the Boltz- mann kinetic equation with the exact collision integral and Shakhov model collision ...of rarefied gas in industrial ...
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Sound propagation through a rarefied gas in rectangular channels
... speed are significantly a↵ected by the aspect ratio of the cavity. When the aspect ratio is larger than the threshold value of 0.5, the damping force and sound speed oscillate in-phase, as the oscillation frequency ...
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Multiscale simulation of heat transfer in a rarefied gas
... dilute gas flows that couples a continuum-fluid description to the direct simulation Monte Carlo (DSMC) ...dilute gas flows, where the coupling is performed through the computed heat ...coupling, ...
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The permeability of ablative materials under rarefied gas conditions
... of rarefied gas flow through these materials have been performed to find the permeability of each material to argon gas and to a gas ...
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