Bluff body flow simulation using lattice Boltzmann equation with multiple relaxation time

2006 ◽  
Vol 35 (8-9) ◽  
pp. 951-956 ◽  
Author(s):  
Y. Liu ◽  
R.M.C. So ◽  
Z.X. Cui
Keyword(s):  
Relaxation Time ◽  
Boltzmann Equation ◽  
Lattice Boltzmann ◽  
Bluff Body ◽  
Flow Simulation ◽  
Lattice Boltzmann Equation ◽  
Multiple Relaxation Time ◽  
Bluff Body Flow

scholarly journals On the moment system and a flexible Prandtl number

2014 ◽  
Vol 28 (06) ◽  
pp. 1450048 ◽  
Author(s):  
Raúl Machado
Keyword(s):  
Relaxation Time ◽  
Boltzmann Equation ◽  
Prandtl Number ◽  
Lattice Boltzmann ◽  
Continuous Distribution ◽  
Lattice Boltzmann Equation ◽  
Collision Model ◽  
Single Relaxation Time ◽  
Moment System ◽  
The Moment

The Maxwell–Boltzmann moment system can be seen as a particular case of a mathematically more general moment system proposed by Machado.1 These last moments, of which a suggested continuous distribution and an integral generating form are presented here for some orders, are used in this paper to theoretically show (one of) their usefulness: A flexible Prandtl number can be obtained in both the Boltzmann equation and in the lattice Boltzmann equation with a conventional single relaxation time Bhatnagar–Gross–Krook (BGK) collision model.

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