Simplified and highly stable thermal Lattice Boltzmann method simulation of hybrid nanofluid thermal convection at high Rayleigh numbers

2020 ◽  
Vol 32 (1) ◽  
pp. 012009 ◽  
Author(s):  
Yuan Ma ◽  
Zhigang Yang
Keyword(s):  
Lattice Boltzmann Method ◽  
Thermal Convection ◽  
Lattice Boltzmann ◽  
Hybrid Nanofluid ◽  
Boltzmann Method ◽  
Thermal Lattice Boltzmann ◽  
Rayleigh Numbers

Numerical Analysis on the Effects of Mixed Convection of Particles Removal Flow over Heated Cavity Using Multi-Relaxation Time Thermal Lattice Boltzmann Method

2014 ◽  
Vol 695 ◽  
pp. 487-490
Author(s):  
Nor Azwadi Che Sidik ◽  
Aman Ali Khan
Keyword(s):  
Distribution Function ◽  
Relaxation Time ◽  
Aspect Ratio ◽  
Mixed Convection ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Numerical Study ◽  
Grashof Number ◽  
Boltzmann Method ◽  
Thermal Lattice Boltzmann

This paper provides numerical study of the effects of mixed convection on particles removal from a cavity using multi-relaxation time thermal lattice Boltzmann method (LBM) for compute the flow and isotherm characteristics in the bottom heated cavity located on a floor of horizontal channel. A point force scheme was applied for particles-fluid interactionand double-distribution function (DFF) was coupled with MRT thermal LBM to study the effects of various grashof number (Gr) and Aspect Ratio (AR) on the efficiency of particles removal. The results show that change in Grashof number and Aspect ratio causes a dramatic different in the flow pattern and particles removal efficiency.

Aerodynamics Research of Thermal Fluid Circulation in a Heated Cavity

2014 ◽  
Vol 668-669 ◽  
pp. 326-330
Author(s):  
Guang Zhao
Keyword(s):  
Lattice Boltzmann ◽  
Area Ratio ◽  
Circulation Rate ◽  
Fluid Circulation ◽  
Square Cavity ◽  
Heating Source ◽  
Mass And Heat Transfer ◽  
Boltzmann Method ◽  
Thermal Lattice Boltzmann ◽  
Rayleigh Numbers

In this paper, numerical simulation of natural convection in a closure square cavity with heating source on the basement is carried out using thermal lattice Boltzmann method. The purpose of this work is to analysis the physics of mass and heat transfer in such a condition. For different Rayleigh numbers, the relative heating area ratio is changed in the range of 0.1-1.0, correspondingly. It is found that the flow pattern is symmetrical for increases from 103to 106, and the boundary layers at low temperature become thinner, also the circulation rate is higher. For a special Rayleigh number, is as a monotone increment function of relative heating area ratio, and the value of which almost increases linearly when the area is below 0.8, and then reach to its maximum exponentially.

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