Study for Modification Lattice Boltzmann Model Application to Flow Characteristics for Gas Hydrate Decomposition in Sediment

2012 ◽  
Author(s):  
Xichong Yu ◽  
Yu Liu ◽  
Weixin Pang ◽  
Yuhu Bai ◽  
Jiafei Zhao
Keyword(s):  
Porous Media ◽  
Gas Hydrate ◽  
Lattice Boltzmann ◽  
Single Phase ◽  
Flow Characteristics ◽  
Lattice Boltzmann Model ◽  
Flow In Porous Media ◽  
Micro Channel ◽  
Hydrate Decomposition ◽  
Boltzmann Model

In this paper, based on sediment with gas hydrate and flow characteristics for gas hydrate decomposition, the interaction and density difference between the phases are considered, conventional lattice Boltzmann model is modified to new lattice Boltzmann model then is applied to study flow characteristics for gas hydrate decomposition in sediment. The method is the mesoscopic model between macro and micro methods between. Modification lattice Boltzmann model is applied to carry out a complex micro-channel single-phase, multiphase flow simulation analysis, single-phase flow in porous media for gas hydrate decomposition. The results show that complex micro-channel flow field depends on the micro-channel roughness, bending degree, surface wet ability, fluid properties and other media. Single-phase flow in porous media depends on the pore diameter (saturation) and permeability of the sediment and the hydrate formation in the sediment so greatly reduces the permeability of porous media.

scholarly journals Study of Gas Flow Characteristics in Tight Porous Media with a Microscale Lattice Boltzmann Model

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Jianlin Zhao ◽  
Jun Yao ◽  
Min Zhang ◽  
Lei Zhang ◽  
Yongfei Yang ◽  
...  
Keyword(s):  
Porous Media ◽  
Lattice Boltzmann ◽  
Gas Flow ◽  
Flow Characteristics ◽  
Lattice Boltzmann Model ◽  
Tight Porous Media ◽  
Boltzmann Model

Simulation of Flow in Multi-Scale Porous Media Using the Lattice Boltzmann Method on Quadtree Grids

2016 ◽  
Vol 19 (4) ◽  
pp. 998-1014 ◽  
Author(s):  
Lei Zhang ◽  
Qinjun Kang ◽  
Li Chen ◽  
Jun Yao
Keyword(s):  
Porous Media ◽  
Lattice Boltzmann ◽  
Voronoi Tessellation ◽  
Flow Simulation ◽  
Lattice Boltzmann Model ◽  
Flow In Porous Media ◽  
Multi Scale ◽  
Multiple Length Scales ◽  
Boltzmann Method ◽  
Boltzmann Model

AbstractThe unified lattice Boltzmann model is extended to the quadtree grids for simulation of fluid flow through porous media. The unified lattice Boltzmann model is capable of simulating flow in porous media at various scales or in systems where multiple length scales coexist. The quadtree grid is able to provide a high-resolution approximation to complex geometries, with great flexibility to control local grid density. The combination of the unified lattice Boltzmann model and the quadtree grids results in an efficient numerical model for calculating permeability of multi-scale porous media. The model is used for permeability calculation for three systems, including a fractured system used in a previous study, a Voronoi tessellation system, and a computationally-generated pore structure of fractured shale. The results are compared with those obtained using the conventional lattice Boltzmann model or the unified lattice Boltzmann model on rectangular or uniform square grid. It is shown that the proposed model is an accurate and efficient tool for flow simulation in multi-scale porous media. In addition, for the fractured shale, the contribution of flow in matrix and fractures to the overall permeability of the fractured shale is studied systematically.

scholarly journals A Lattice Boltzmann Model for Two-Phase Flow in Porous Media

2019 ◽  
Vol 41 (4) ◽  
pp. B746-B772 ◽  
Author(s):  
Zhenhua Chai ◽  
Hong Liang ◽  
Rui Du ◽  
Baochang Shi
Keyword(s):  
Porous Media ◽  
Lattice Boltzmann ◽  
Two Phase Flow ◽  
Lattice Boltzmann Model ◽  
Flow In Porous Media ◽  
Phase Flow ◽  
Two Phase ◽  
Boltzmann Model

An Improved Single-Phase Free-Surface Lattice Boltzmann Model with Surface Tension and Wall Adhesion

2013 ◽  
Vol 300-301 ◽  
pp. 1062-1066
Author(s):  
Yang Yu ◽  
Li Chen ◽  
Jian Hua Lu ◽  
Guo Xiang Hou
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Lattice Boltzmann ◽  
Single Phase ◽  
Lattice Boltzmann Model ◽  
Surface Model ◽  
Two Phase ◽  
Surface Method ◽  
Free Surface Model ◽  
Boltzmann Model

Free-surface model with surface tension and wall adhesion(wetting) is a very efficient technique to simulate two-phase flows with high density and viscosity ratios, such as etching and casting processes. In this paper, a conservative surface tension and wall adhesion model based on lattice Boltzmann single-phase free-surface method is proposed. The effectiveness of the model is demonstrated by simulating the flows induced by wall adhesion and surface tension, and filling processes in a 2D cavity.

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