Large Eddy Simulation Using Lattice Boltzmann Method Based on Sigma Model

Pradhan, Aniruddhe; Yadav, Sumedh

doi:10.1016/j.proeng.2015.11.324

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…A statistical turbulence model (k−ε) was introduced in LBM in Ref [27]. A. Pradhan [19] used the LBM to simulate turbulent flows in a channel using the sigma model for LES. K. N. Premnath [28] incorporated dynamic sub-grid scale (SGS) models in the LBM for LES of turbulent flows.…”

Section: )mentioning

confidence: 99%

“…LBM with LES is capable to give more intrinsically predictions and explanations of swirling dominated flows from mesoscopic view. Besides, the LBM has some distinct advantages for simulating the flows in pump intake, such as, its high accuracy and the efficiency in the transient flows simulation, convenience to easily treat with complex geometry boundary conditions [18], simplicity of programming, intrinsic parallel algorithm, and so on [19][20][21][22]. Hence, SRT-LBM-LES model is adopted in predicting vortex flows inside open pump intakes in this paper, and compared with MRT-LBM model, the cost of computing decrease effectively under the same accuracy conditions.…”

Section: Introductionmentioning

confidence: 99%

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Applications of Three-Dimensional LBM-LES Combined Model for Pump Intakes

Guo¹,

Tang²,

Su³

et al. 2018

CICP

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Lattice Boltzmann model (LBM) in conjunction with an accurate Large Eddy Simulation (LES) technology was proposed to simulate various vortical structures and their evolutions in open pump intakes. The strain rate tensor in the LES model is locally calculated by means of non-equilibrium moments based on Chapman-Enskog expansion, and bounce-back scheme was used for non-slip condition on solid walls and reflection scheme for free surface. The presented model was applied to investigate free-surface and wall-attached vortices for different water levels and flow rate. The vortex position, shapes and vorticities were predicted successfully under three flowing cases (i.e. critical water level (CWL), lower water level, lower flow rate), and the numerical velocity and streamline distribution were analyzed systematically. For CWL based on Froude number considering open channel flows, the shape and the location of various dynamic vortices were captured. Compare to the experimental results of CWL, more vortices were predicted for lower water level, and less vortices were observed for lower flow rate. The predicted velocities and vortex locations are in good agreement with the experimental of a small physical model. The comparisons demonstrated the feasibility and stability of above-mentioned model and numerical method in predicting vortex flows inside open pump intakes.

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Section: )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applications of Three-Dimensional LBM-LES Combined Model for Pump Intakes

Guo¹,

Tang²,

Su³

et al. 2018

CICP

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show abstract

Flow characteristics within the wall boundary layers of swirling steam flow in a pipe comprising horizontal and inclined sections

Khan

Takriff

Rosli

et al. 2020

Korean J. Chem. Eng.

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A Preliminary Study on the Simulation of Vortex Flow in Pump Intake Based on LBM-VOF-LES Combined Model

Guo

Tang

et al. 2021

Journal of Fluids Engineering

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In this paper, the LBM-LES (Lattice Boltzmann Method-Large eddy Simulation) model was combined with the VOF (Volume of Fluid) method and used to simulate vortex flow in a typical pump intake. The strain rate tensor in the LES model is locally calculated utilizing non-equilibrium moments based on Chapman-Enskog expansion, and the bounce-back scheme is used for non-slip condition on the solid wall and VOF method for the free surface. The evolution of all kinds of cells on the free surface is based on the mass exchange in the VOF method, i.e. LB-SP (Lattice Boltzmann-Single Phase) free surface model. The introduction of the external force terms is established through adding corresponding expressions on the right of the LBE (Lattice Boltzmann Equation), and by modifying the velocity. The predicted vortex flow patterns (core location and strength of the vortex) and velocity correlate with the experiments undertaken with the physical model. A comparison of the results demonstrates the feasibility and stability of the model and the numerical method in predicting vortex flows inside pump intakes. The model developed and presented in this paper provides a new analysis method of vortex flow patterns in pump intake from a mesoscopic perspective, enriches the relevant technologies, and makes corresponding contributions to further engineering applications.

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Large Eddy Simulation Using Lattice Boltzmann Method Based on Sigma Model

Cited by 3 publications

References 7 publications

Applications of Three-Dimensional LBM-LES Combined Model for Pump Intakes

Applications of Three-Dimensional LBM-LES Combined Model for Pump Intakes

Flow characteristics within the wall boundary layers of swirling steam flow in a pipe comprising horizontal and inclined sections

A Preliminary Study on the Simulation of Vortex Flow in Pump Intake Based on LBM-VOF-LES Combined Model

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