Lattice-Boltzmann lattice-spring simulations of flexibility and inertial effects on deformation and cruising reversal of self-propelled flexible swimming bodies

2017 ◽  
Vol 155 ◽  
pp. 89-102 ◽  
Author(s):  
Ye Luo ◽  
Tai-Hsien Wu ◽  
Dewei Qi
Keyword(s):  
Lattice Boltzmann ◽  
Inertial Effects ◽  
Boltzmann Lattice

Lattice-Boltzmann Method for Macroscopic Porous Media Modeling

1998 ◽  
Vol 09 (08) ◽  
pp. 1491-1503 ◽  
Author(s):  
David M. Freed
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Inertial Effects ◽  
Simulation Region ◽  
Flow Through ◽  
Previous Algorithm ◽  
Validation Tests ◽  
Boltzmann Method

An extension to the basic lattice-BGK algorithm is presented for modeling a simulation region as a porous medium. The method recovers flow through a resistance field with arbitrary values of the resistance tensor components. Corrections to a previous algorithm are identified. Simple validation tests are performed which verify the accuracy of the method, and demonstrate that inertial effects give a deviation from Darcy's law for nominal simulation velocities.

scholarly journals Lattice-Boltzmann lattice-spring simulations of two flexible fibers settling in moderate Reynolds number flows

2018 ◽  
Vol 167 ◽  
pp. 341-358
Author(s):  
Ahmed Abdulkareem Alhasan ◽  
Ye Luo ◽  
Tai-Hsien Wu ◽  
Guowei He ◽  
Dewei Qi
Keyword(s):  
Reynolds Number ◽  
Lattice Boltzmann ◽  
Moderate Reynolds Number ◽  
Flexible Fibers ◽  
Reynolds Number Flows ◽  
Boltzmann Lattice

A CUDA-Based Implementation of a Fluid-Solid Interaction Solver: The Immersed Boundary Lattice-Boltzmann Lattice-Spring Method

2018 ◽  
Vol 23 (4) ◽  
Author(s):  
Tai-Hsien Wu ◽  
Mohammadreza Khani Khani ◽  
Lina Sawalha ◽  
James Springstead ◽  
John Kapenga ◽  
...  
Keyword(s):  
Lattice Boltzmann ◽  
Immersed Boundary ◽  
Spring Method ◽  
Fluid Solid Interaction ◽  
Boltzmann Lattice

Analysis of Fluid Flow in Porous Media Using the Lattice Boltzmann Method: Inertial Flow Regime

2012 ◽  
Author(s):  
Huizhe Zhao ◽  
Aydin Nabovati ◽  
Cristina H. Amon
Keyword(s):  
Reynolds Number ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Critical Reynolds Number ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Inertial Effects ◽  
Inertial Flow ◽  
Boltzmann Method ◽  
Three Dimensional Simulations

In this work, we use the lattice Boltzmann method to study inertial flow in three-dimensional random fibrous porous materials. In order to validate the methodology, inertial flow in two-dimensional hexagonal arrangements of circular cylinders is simulated, and the results are compared against those previously reported in the literature. The three-dimensional fibrous porous materials are then constructed by randomly placing straight cylindrical fibers inside the computational domain. Inertial effects are studied systematically for a wide range of pore Reynolds numbers in materials with porosities between 0.60 and 0.95. A previously proposed semi-empirical relation is modified to represent the inertial effects in three-dimensional fibrous materials. Three distinct regimes of constant, quadratic, and linear relations between the inverse of the permeability and pore Reynolds number are observed for both two- and three-dimensional simulations. The critical Reynolds number, beyond which the inertial effects are strong and this relation is linear, is shown to be smaller in three-dimensional simulations, when compared to the critical Reynolds number in two-dimensional simulations.

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