The use of MRT-lattice Boltzmann method for the prediction of fluid solid flow

Sidik, Nor Azwadi Che; Khan, Aman Ali; Kermani, Emad Pouryazdanpanah; Manshor, Akmal Hamizi; Jahanshaloo, Leila

doi:10.1088/1757-899x/50/1/012037

“…A mesoscopic simulation technique such as the lattice Boltzmann method (LBM) can be used to understand the flow of STF through a micron-size length scale. The lattice Boltzmann equation can be looked at as the development of lattice gas automata [11] or as a discrete version of the continuous Boltzmann equation [12]. In the lattice Boltzmann method [6,13], a particle distribution function is used to study the velocity profile of the fluid.…”

Section: Introductionmentioning

confidence: 99%

The channel flow of a real shear thickening fluid using the Lattice Boltzmann Simulation and the Theoretical Model

Vishal,

Garg,

Sarkar

et al. 2023

Preprint

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Understanding a real shear-thickening fluid (STF) flowing through channel is essential in developing soft body armour applications. A real shear thickening fluid has a combination of parts-wise Newtonian, shear thinning and shear thickening regions in the viscosity-shear rate plot. The Lattice Boltzmann method (LBM), a mesoscopic simulation, is employed in a D2Q9 framework to study the flow characteristics of a real shear thickening fluid. To validate the results, we compared the numerical and analytical results obtained for fluid flow with a combination of power-law fluids with shear thickening and shear thinning behaviour, which are characterized by different power-law indexes. The effect of stress and strain rate on fluid flow has been studied. Next, we have also extended the above model to see the characteristics of the flow properties of a real shear thickening fluid having three distinct regions of Newtonian, shear thinning, and shear thickening in the viscosity-shear rate plot and discussed the results using the Lattice Boltzmann method (LBM) and with a theoretical model. We find that for the low shear rates, the Newtonian flow rate dominates, and as we keep increasing the shear rate through increasing, the thinning behaviors start to dominate, followed by the thickening phenomenon of the flow. We also find that initially, the flow begins with the Newtonian flow, and as we increase the channel height, the thinning flow starts to dominate, and for larger height channels, the thickening flow of real STF dominates.

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“…A mesoscopic simulation technique such as the lattice Boltzmann method (LBM) can be used to understand the flow of STF through a micron-size length scale. The lattice Boltzmann equation can be looked at as the development of lattice gas automata [12] or as a discrete version of the continuous Boltzmann equation [13]. In the lattice Boltzmann method [6,14], a particle distribution function is used to study the velocity profile of the fluid.…”

Section: Introductionmentioning

confidence: 99%

The channel flow of a real shear thickening fluid using the Lattice Boltzmann Simulation and the Theoretical Model

Vishal,

Garg,

Sarkar

et al. 2024

Preprint

1

0

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Understanding a real shear-thickening fluid (STF) flowing through channel is essential in developing soft body armour applications. A real shear thickening fluid has a combination of parts-wise Newtonian, shear thinning and shear thickening regions in the viscosity-shear rate plot. The Lattice Boltzmann method (LBM), a mesoscopic simulation, is employed in a D2Q9 framework to study the flow characteristics of a real shear thickening fluid. To validate the results, we compared the numerical and analytical results obtained for fluid flow with a combination of power-law fluids with shear thickening and shear thinning behaviour, which are characterized by different power-law indexes. The effect of stress and strain rate on fluid flow has been studied. Next, we have also extended the above model to see the characteristics of the flow properties of a real shear thickening fluid having three distinct regions of Newtonian, shear thinning, and shear thickening in the viscosity-shear rate plot and discussed the results using the Lattice Boltzmann method (LBM) and with a theoretical model. We find that for the low shear rates, the Newtonian flow rate dominates, and as we keep increasing the shear rate through increasing, the thinning behaviors start to dominate, followed by the thickening phenomenon of the flow. We also find that initially, the flow begins with the Newtonian flow, and as we increase the channel height, the thinning flow starts to dominate, and for larger height channels, the thickening flow of real STF dominates.

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“…From its birth, the lattice Boltzmann method (LBM) has been gradually proved itself as an alternative numerical method for simulating various types of fluid flows. It has been used extensively in different fields of computational fluid dynamics (CFD), such turbulent flows, particulate flows and multiphase flows [1][2][3][4]. Intrinsic characteristics of LBM method such as parallel computation [5] and easiness in handling complicated geometries [6] make it more attractive than conventional continuum-based CFD methods.…”

Section: Introductionmentioning

confidence: 99%

Application of the Lattice Boltzmann Method for Fluid Flow around Complex Geometry

Jahanshaloo

¹

,

Sidik

²

,

Kermani

³

2014

AMM

0

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In recent years, several strategies have been proposed to deal with complex geometry to study particle-fluid interaction using lattice Boltzmann method. Curved boundary treatments have been suggested to improve the accuracy of the stair-shaped approximation in conventional lattice Boltzmann simulations. This paper presents numerical analysis of three interpolation methods for confined flow around blockage positioned inside a channel. A two-dimensional nine velocity lattice arrangement was chosen to discretize the fluid domain and single relaxation time technique is applied in this study. The results are presented in terms of velocity contour, lift and drag forces variation for three different shapes of blockage. The simulations results are then compared with those obtained using the three different interpolating treatments. Some of these methods show more adaptability for force evaluating on distinct surfaces.

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The use of MRT-lattice Boltzmann method for the prediction of fluid solid flow

Cited by 4 publications

References 17 publications

The channel flow of a real shear thickening fluid using the Lattice Boltzmann Simulation and the Theoretical Model

The channel flow of a real shear thickening fluid using the Lattice Boltzmann Simulation and the Theoretical Model

The channel flow of a real shear thickening fluid using the Lattice Boltzmann Simulation and the Theoretical Model

Application of the Lattice Boltzmann Method for Fluid Flow around Complex Geometry

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