Analysis of reflective and non-reflective boundary conditions in LBM simulations of flow past an obstacle in a channel

Puig-Arànega, Albert; Burgos, J.; Cito, Salvatore; Cuesta, Ildefonso; Salueña, Clara

doi:10.1080/10618562.2015.1111341

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…They reported effect of R e on the flow structure. In their recent study Puig-Aranega and co-workers 5 searched Newtonian flow around a square cylinder obstacle using lattice Boltzmann method for 50 ≤ Re ≤ 100. They reported strong impact of imposed boundary conditions on the stress field around the cylinder.…”

Section: öZmentioning

confidence: 99%

Stress behaviours of viscoelastic flow around square cylinder

Tezel¹,

Yapıcı²,

Uludağ³

2019

International Journal of Chemistry and Technology

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In this study, it is aimed the numerically investigation of the flow of liner PTT (Phan-Thien-Tanner) fluid, which is a viscoelastic fluid model over limited square obstacle by finite volume method. The finite volume method has been used for simultaneous solution of continuity, momentum and fluid model equations with appropriate boundary conditions. The effects of the inertia in terms of Reynolds number, Re, (0 < Re < 20) and the of elasticity in terms of Weissenberg number, We, (1 < We < 15) of PTT flow on vertical and shear stress areas are examined in detail.

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Section: öZmentioning

confidence: 99%

Stress behaviours of viscoelastic flow around square cylinder

Tezel¹,

Yapıcı²,

Uludağ³

2019

International Journal of Chemistry and Technology

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“…To continue with the CBC developments, Heubes et al [20] proposed a linear combination between Thompson's boundary conditions [21] and the LODI relations. Comparing the approaches of Izquierdo and Heubes, Puig-Arànega et al [22] found that the LODI equations become inappropriate when the dimensionality of the flow increases. Consequently, Jung et al [23] developed a two-dimensional generalization of the CBC, by recovering the transverse and viscous terms in the characteristics analysis [24,25,26].…”

Section: Introductionmentioning

confidence: 99%

A non-reflective boundary condition for LBM based on the assumption of non-equilibrium symmetry

Euser

Vuik

2020

Preprint

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In this study a new type of non-reflective boundary condition (NRBC) for the Lattice Boltzmann Method (LBM) is proposed; the Non-equilibrium Symmetry Boundary Condition (NSBC). The idea behind this boundary condition is to utilize the characteristics of the non-equilibrium distribution function to assign values to the incoming populations. A simple gradient based extrapolation technique and a far-field criterion are used to predict the macroscopic fluid variables. To demonstrate the non-reflective behaviour of the NSBC, two different tests have been carried out, examining the capability of the boundary to absorb acoustic waves respectively vortices. The results for both tests show that the amount of reflection generated by the NSBC is nearly zero.

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Analysis of reflective and non-reflective boundary conditions in LBM simulations of flow past an obstacle in a channel

Cited by 2 publications

References 18 publications

Stress behaviours of viscoelastic flow around square cylinder

Stress behaviours of viscoelastic flow around square cylinder

A non-reflective boundary condition for LBM based on the assumption of non-equilibrium symmetry

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