27 research outputs found
A Fokker-Planck model of the Boltzmann equation with correct Prandtl number
Get PDFWe propose an extension of the Fokker-Planck model of the Boltzmann equation to get a correct Prandtl number in the Compressible Navier-Stokes asymptotics. This is obtained by replacing the diffusion coefficient (which is the equilibrium temperature) by a non diagonal temperature tensor, like the Ellipsoidal-Statistical model (ES) is obtained from the Bathnagar-Gross-Krook model (BGK) of the Boltzmann equation. Our model is proved to satisfy the properties of conservation and a H-theorem. A Chapman-Enskog analysis and two numerical tests show that a correct Prandtl number of 2/3 can be obtained
A Fokker–Planck Model of the Boltzmann Equation with Correct Prandtl Number for Polyatomic Gases
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Study of scoop drive and polymeric surface effects on the separation factors for a gas centrifuge using MD-DSMC method
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FVM method based on K − ε model to simulate the turbulent convection of nanofluid through the heat exchanger porous media
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