A5042461725- Lattice Boltzmann Simulation Studies
- Aerosol Filtration and Electrostatic Precipitation
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Biomimetic flight and propulsion mechanisms
- Fluid Dynamics and Heat Transfer
- Generative Adversarial Networks and Image Synthesis
- Blood properties and coagulation
- Heat and Mass Transfer in Porous Media
- Rheology and Fluid Dynamics Studies
- Topology Optimization in Engineering
- Aerodynamics and Fluid Dynamics Research
- Vibration and Dynamic Analysis
- Advanced Mathematical Modeling in Engineering
- Adhesion, Friction, and Surface Interactions
- Icing and De-icing Technologies
- Tribology and Lubrication Engineering
- Phase Change Materials Research
- Advancements in Solid Oxide Fuel Cells
- Nuclear Materials and Properties
- Catalytic Processes in Materials Science
- Advanced Power Generation Technologies
- Aerospace Engineering and Energy Systems
- Fluid Dynamics Simulations and Interactions
- Catalysts for Methane Reforming
Shinshu University
2015-2024
Ōtani University
2012-2023
Institute of Engineering
2017-2020
Nagoya University
1997-2019
Chiba Institute of Technology
2019
Toshiba (Japan)
2006-2018
Kyoto University
1995-2014
Kyoto Katsura Hospital
2013
Japan Science and Technology Agency
2008-2011
Yamagata University
2000
A non-slip boundary condition at a wall for the lattice Boltzmann method is presented. In present unknown distribution functions are assumed to be an equilibrium function with counter slip velocity which determined so that fluid equal velocity. Poiseuille flow and Couette calculated nine-velocity model demonstrate accuracy of condition.
Abstract The lattice Boltzmann method (LBM) for a binary miscible fluid mixture is applied to problems of transport phenomena in three‐dimensional porous structure. Boundary conditions the particle distribution function diffusing component are described detail. Flow characteristics and concentration profiles species at pore scale structure obtained various Reynolds numbers. At high numbers, highly affected by flow convection become completely different from those low Sherwood numbers...
The asymptotic theory proposed by Sone [in Rarefied Gas Dynamics, edited D. Dini (Editrice Tecnico Scientifica, Pisa, 1971), p. 737] is applied to the investigation of accuracy lattice Boltzmann method (LBM) for small Knudsen number with finite Reynolds number. S-expansion procedure LBM nine-velocity model and fluid-dynamic type equations are obtained. From it found that using we can obtain macroscopic flow velocities pressure gradient incompressible fluid relative errors O(ε′2) where ε′ a...
The lattice Boltzmann method (LBM) with the fifteen-velocity model is applied to simulations of isothermal flows in a three-dimensional porous structure. A periodic boundary condition pressure difference at inlet and outlet presented. Flow characteristics pore scale drops through structure are calculated for various Reynolds numbers. It found that high numbers, unsteady vortices appear behind bodies flow field becomes time-dependent. Calculated compared well-known empirical equations based...
Abstract We derive the incompressible Navier--Stokes equations from lattice Boltzmann equation using Chapman--Enskog expansion and Sone clarify differences between two approaches. In expansion, we first compressible Navier—Stokes on multiple time scales (the acoustic diffusive scales). Then are derived under conditions of low Mach number flows small density variations scale. If scale remains in analysis macroscopic equations, recovered with only first-order spatial accuracy. On other hand,...
Development of a microfluidic device equipped with micromesh for detection Cryptosporidium parvum oocyst was reported. A consisting 10 x cavities microfabricated on the stainless steel plate by laser ablation. Each cavity size, approximately 2.7 microm in diameter, adopted to capture single C. oocyst. Under negative pressure operation, suspensions containing microbeads or oocysts flowed into microchannel. Due strong non-specific adsorption onto PDMS microchannel surface during sample...
The lattice Boltzmann method (LBM) is a numerical with second-order spatial accuracy for incompressible viscous fluid flows based on an analogy the kinetic theory of gases. Recently, collision model LBM has become more and complicated as its stability been enhanced. In this paper, conversely, we propose simple extended LBMs having good models by using scheme (LKS), which LBM. First, several schemes single-phase LKS are presented. stable but higher-order dissipation errors in calculation...
AbstractThe accuracy and efficiency of the lattice Boltzmann method (LBM) finite difference (FDM) are numerically investigated. In FDM for incompressible viscous flows, it is usually needed to solve a Poisson equation pressure by iteration or relaxation technique, while in LBM, such special treatment not required. Two-dimensional problems flows thermal fluid computed using LBM FDM. problem through porous structure, present results indicate that more efficient than FDM, because there no need...
Abstract A thermal lattice Boltzmann method (LBM) for two-phase fluid flows in nucleate pool boiling process is proposed. In the present method, a new function heat transfer introduced to isothermal LBM immiscible fluids with large density differences. The calculated temperature substituted into pressure tensor, which used calculation of an order parameter representing two phases so that bubbles can be formed by boiling. By using this two-dimensional simulations source on solid wall are...
Wing flexibility is one of the important factors not only for lift and thrust generation enhancement in flapping flight but also development micro-air vehicles with wings. In this study, we construct a flexible wing chordwise by connecting two rigid plates torsion spring, investigate effect on simple butterfly model using an immersed boundary-lattice Boltzmann method. First, effects spring stiffness aerodynamic performance when body fixed. We find that time-averaged forces required power...
Hemodynamic factors, especially wall shear stress (WSS), are generally thought to play an important role in intracranial aneurysm (IA) formation. IAs frequently occur at bifurcation apices, where the vessels exposed impact of WSS.To elucidate relationship between geometry and WSS for IA formation.Twenty-one models varying branch angles diameters were made with 3-dimensional computer-aided design software. In all models, value maximum (WSSMAX), area high (AREA), magnitude force over AREA ($|...
The wings of butterflies are relatively heavier than those other insects, and the inertial force torque due to wing mass likely have a significant effect on agility manoeuvrability in flapping flight butterflies. In present study, free is investigated by numerical simulations based an immersed boundary–lattice Boltzmann method. We use butterfly-like model consisting two square with connected rod-shaped body. simulate flights changing ratio total also distributions wings. As result, we find...