Numerical research of the infinitely wide wedge flow based on the lattice Boltzmann method

A new computational fluid dynamics method, the incompressible lattice Boltzmann method (LBM) is utilized to simulate fluid flow of the infinitely wide wedge in this paper. Compared with the traditional method, LBM is a mesoscopic scale method and some characteristics can be described more clearly with LBM. In this article, three kinds of model .i.e. linear type, parabolic type and harmonic type wedge models are built. The streamline and velocity contour in the fluid field are described. The pressure distribution of different types wedge is studied in LBM. The results manifest that, for the same bottom boundary velocity, the parabolic type and harmonic type wedges are easy to form a vortex, and the load capacity in the harmonic type wedge model is the largest. This paper is ready to investigate the microscopic lubrication mechanism of journal bearing in the future.

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LATTICE BOLTZMANN METHOD IN SIMULATION OF THERMAL MICRO-FLOW WITH TEMPERATURE JUMP

International Journal of Modern Physics C ◽

10.1142/s0129183106009187 ◽

2006 ◽

Vol 17 (05) ◽

pp. 603-614 ◽

Cited By ~ 18

Author(s):

ZHI-WEI TIAN ◽

CHUN ZOU ◽

ZHAO-HUI LIU ◽

ZHAO-LI GUO ◽

HONG-JUAN LIU ◽

...

Keyword(s):

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Gas Flow ◽

Heat Dissipation ◽

Temperature Jump ◽

Velocity Slip ◽

Boundary Treatment ◽

Boundary Velocity ◽

Micro Flow ◽

Boltzmann Method

We simulate the gas flow and heat transfer in micro-Couette flow by the lattice Boltzmann method (LBM). A new boundary treatment is adopted in the numerical experiment in order to capture the velocity slip and the temperature jump of the wall boundary. Velocity and temperature profiles are in good agreement with the analytic results, which exhibits the availability of this model and boundary treatment in describing thermal micro-flow with viscous heat dissipation. We also find the upper boundary's temperature jump is zero at the critical Ec, which is around 3.0 with different Kn.

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A novel immersed boundary velocity correction–lattice Boltzmann method and its application to simulate flow past a circular cylinder

Journal of Computational Physics ◽

10.1016/j.jcp.2007.06.002 ◽

2007 ◽

Vol 226 (2) ◽

pp. 1607-1622 ◽

Cited By ~ 132

Author(s):

C. Shu ◽

N. Liu ◽

Y.T. Chew

Keyword(s):

Circular Cylinder ◽

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Immersed Boundary ◽

Velocity Correction ◽

Flow Past ◽

Boundary Velocity ◽

Boltzmann Method

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Multiple-relaxation-time lattice Boltzmann method of hydrodynamic lubrication in lemon-bore bearing

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650117719615 ◽

2017 ◽

Vol 232 (4) ◽

pp. 469-479 ◽

Cited By ~ 5

Author(s):

Alireza Arab Solghar

Keyword(s):

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Hydrodynamic Lubrication ◽

Interpolation Method ◽

Load Capacity ◽

Linear Interpolation ◽

Geometrical Parameters ◽

Comparison Of The Results ◽

Ellipticity Ratio ◽

Boltzmann Method

The lattice Boltzmann method has superiority over conventional computational fluid dynamics methods, particularly for the flow simulations in complex geometries. In the present work, the performance of hydrodynamic lemon-bore (elliptical) journal bearings was investigated with the implementation of the lattice Boltzmann method. The steady-state laminar flow of a homogeneous oil was considered in the computations. A linear interpolation method was exploited to obtain the surface curvatures. The comparison of the results obtained from the proposed methodology with available literature data showed a satisfactory agreement. The effect of geometrical parameters on the hydrodynamic lubrication in an elliptical journal bearing was analyzed. It was found that the ellipticity ratio has profound effects on the bearing load capacity, oil flow rate and bearing power loss.

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Validation of an Adaptive Meshing Implementation of the Lattice-Boltzmann Method for Insect Flight

Volume 1A, Symposia: Turbomachinery Flow Simulation and Optimization; Applications in CFD; Bio-Inspired and Bio-Medical Fluid Mechanics; CFD Verification and Validation; Development and Applications of Immersed Boundary Methods; DNS, LES and Hybrid RANS/LES Methods; Fluid Machinery; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Active Fluid Dynamics and Flow Control — Theory, Experiments and Implementation ◽

10.1115/fedsm2016-7782 ◽

2016 ◽

Author(s):

Jeffrey Feaster ◽

Francine Battaglia ◽

Ralf Deiterding ◽

Javid Bayandor

Keyword(s):

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Degrees Of Freedom ◽

Insect Flight ◽

Three Dimensional ◽

Two Dimensions ◽

Adaptive Meshing ◽

Complex Flow ◽

Fluid Field ◽

Boltzmann Method

Insects, sustaining flight at low Reynolds numbers (500<Re<10,000), fly utilizing mechanically simple kinematics (3 degrees of freedom) at an extremely high flap frequency (150–200 Hz), resulting in a complicated vortical fluid field. These flight characteristics result in some of the most agile and maneuverable flight capabilities in the animal kingdom and are considered to be far superior to fixed wing flight, such as aircraft. Bees are of particular interest because of the utilization of humuli to attach their front and hind wings together during flight. A Cartesian-based adaptive meshing implementation of the Lattice-Boltzmann Method is utilized to resolve the complex flow field generated during insect flight and is verified against experimental and computational results present in the literature in two dimensions. The Lattice-Boltzmann Method was found to agree well in both qualitative and quantitative comparisons with both two-dimensional computational and three-dimensional experimental results.

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