TY - GEN
T1 - A new pressure boundary condition of lattice Boltzmann method (LBM) for fully developed pressure-driven periodic incompressible fluid flow
AU - Liao, Quan
AU - Jen, Tien Chien
PY - 2009
Y1 - 2009
N2 - In this paper, a new pressure boundary treatment of lattice Boltzmann method (LBM) for fully developed pressure-driven periodic incompressible fluid flow is proposed. The pressure gradient, instead of equivalent body force, has been applied to determine the particle distribution function on the periodic traverse sections for the fully developed pressure-driven periodic flow. Numerical simulations, including 2D pressure-driven Poiseuille flow and fluid flow passing square obstacles, are carried out using this new boundary treatment. Simulation results show that the proposed approach not only overcomes the nonphysical inlet and outlet flow disturbances (which the LBM simulation always suffers from using the existing pressure boundary methods), but also preserves the system periodicity and generates consistent pressure distribution with macroscopic periodic boundary conditions for the pressure-driven incompressible fluid flow.
AB - In this paper, a new pressure boundary treatment of lattice Boltzmann method (LBM) for fully developed pressure-driven periodic incompressible fluid flow is proposed. The pressure gradient, instead of equivalent body force, has been applied to determine the particle distribution function on the periodic traverse sections for the fully developed pressure-driven periodic flow. Numerical simulations, including 2D pressure-driven Poiseuille flow and fluid flow passing square obstacles, are carried out using this new boundary treatment. Simulation results show that the proposed approach not only overcomes the nonphysical inlet and outlet flow disturbances (which the LBM simulation always suffers from using the existing pressure boundary methods), but also preserves the system periodicity and generates consistent pressure distribution with macroscopic periodic boundary conditions for the pressure-driven incompressible fluid flow.
KW - Boundary condition
KW - Lattice Boltzmann method (LBM)
KW - Periodic fluid flow and pressure driven flow
UR - http://www.scopus.com/inward/record.url?scp=70349089718&partnerID=8YFLogxK
U2 - 10.1115/IMECE2008-66221
DO - 10.1115/IMECE2008-66221
M3 - Conference contribution
AN - SCOPUS:70349089718
SN - 9780791848715
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 1655
EP - 1662
BT - 2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
PB - American Society of Mechanical Engineers (ASME)
T2 - 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Y2 - 31 October 2008 through 6 November 2008
ER -