scholarly journals On the inelastic Boltzmann equation for soft potentials with diffusion

2020 ◽  
Vol 19 (11) ◽  
pp. 5197-5217
Author(s):  
Fei Meng ◽  
◽  
Fang Liu ◽  
Keyword(s):  
Boltzmann Equation ◽  
Inelastic Boltzmann Equation

Dynamics and hydrodynamic limits of the inelastic Boltzmann equation

Nonlinearity ◽  
2010 ◽  
Vol 23 (8) ◽  
pp. 1807-1849 ◽  
Author(s):  
Eric Carlen ◽  
Shui-Nee Chow ◽  
Alexander Grigo
Keyword(s):  
Boltzmann Equation ◽  
Hydrodynamic Limits ◽  
Inelastic Boltzmann Equation

scholarly journals Steady base states for non-Newtonian granular hydrodynamics

2013 ◽  
Vol 719 ◽  
pp. 431-464 ◽  
Author(s):  
Francisco Vega Reyes ◽  
Andrés Santos ◽  
Vicente Garzó
Keyword(s):  
Boltzmann Equation ◽  
Hard Spheres ◽  
Transport Coefficients ◽  
Direct Simulation Monte Carlo ◽  
Granular Flows ◽  
Laminar Flows ◽  
Nonlinear Transport ◽  
Granular Gas ◽  
Inelastic Boltzmann Equation

AbstractWe study in this work steady laminar flows in a low-density granular gas modelled as a system of identical smooth hard spheres that collide inelastically. The system is excited by shear and temperature sources at the boundaries, which consist of two infinite parallel walls. Thus, the geometry of the system is the same that yields the planar Fourier and Couette flows in standard gases. We show that it is possible to describe the steady granular flows in this system, even at large inelasticities, by means of a (non-Newtonian) hydrodynamic approach. All five types of Couette–Fourier granular flows are systematically described, identifying the different types of hydrodynamic profiles. Excellent agreement is found between our classification of flows and simulation results. Also, we obtain the corresponding nonlinear transport coefficients by following three independent and complementary methods: (i) an analytical solution obtained from Grad’s 13-moment method applied to the inelastic Boltzmann equation; (ii) a numerical solution of the inelastic Boltzmann equation obtained by means of the direct simulation Monte Carlo method; and (iii) event-driven molecular dynamics simulations. We find that, while Grad’s theory does not describe quantitatively well all transport coefficients, the three procedures yield the same general classification of planar Couette–Fourier flows for the granular gas.

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