A general approach of unit conversion system in lattice Boltzmann method and applications for convective heat transfer in tube banks

Huang, Jianyi; Bao, Cheng; Jiang, Zeyi; Zhang, Xinxin

doi:10.1016/j.ijheatmasstransfer.2019.02.014

Cited by 12 publications

(3 citation statements)

References 39 publications

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“…This temperature was then enforced by using the anti-bounce-back method of Ginzburg et al [38]. Additionally, the convective heat flux boundary condition of Huang et al [40] was used, which allows setting a specific value for the heat-transfer coefficient h.…”

Section: Boundary Conditionsmentioning

confidence: 99%

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Numerical Investigation of Conjugate Heat Transfer and Natural Convection Using the Lattice-Boltzmann Method for Realistic Thermophysical Properties

Landl

Prieler

Monaco

et al. 2023

Fluids

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To enable the lattice-Boltzmann method (LBM) to account for temporally constant but spatially varying thermophysical properties, modifications must be made. Recently, many methods have emerged that can account for conjugate heat transfer (CHT). However, there still is a lack of information on the possible physical property range regarding realistic properties. Therefore, two test cases were investigated to gain further insight. First, a differentially heated cavity filled with blocks was used to investigate the influence of CHT on the error and stability of the LBM simulations. Reference finite volume method (FVM) simulations were carried out to estimate the error. It was found that a range between 0.5 to 1.5 is recommended for the fluid relaxation time to balance computational effort, stability, and accuracy. In addition, realistic thermophysical properties of fluids and solids were selected to test whether the lattice-Boltzmann method is suitable for simulating relevant industry-related applications. For a stable simulation, a mesh with 64 times more lattices was needed for the most extreme test case. The second test case was an insulated cavity with a heating pad as the local heat source, which was investigated in terms of the accuracy of a transient simulation and compared to a FVM simulation. It was found that the fluid-phase relaxation time mainly determines the error and that large thermal relaxation times for the solid improve accuracy. Observed deviations from the FVM reference simulations ranged from approximately 20% to below 1%, depending on collision operator and combination of relaxation times. For processes with a large temperature spread, the temporally constant thermophysical properties of the LBM are the primary constraint.

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Section: Boundary Conditionsmentioning

confidence: 99%

“…The convective heat flux boundary condition was implemented as proposed by Huang et al [40] and reads…”

Section: Boundary Conditionsmentioning

confidence: 99%

Numerical Investigation of Conjugate Heat Transfer and Natural Convection Using the Lattice-Boltzmann Method for Realistic Thermophysical Properties

Landl

Prieler

Monaco

et al. 2023

Fluids

View full text Add to dashboard Cite

show abstract

“…In another study, Sahamifar et al [26] recorded that the inlet Reynolds and Prandtl numbers did not affect the optimum dimensionless spacings in the turbulent regime. Huang et al [27] simulated the thermal behaviour of a flow across inline and staggered CCT bank using lattice Boltzmann approach. Sakhaei et al [28] practically and numerically analyzed the hydrothermal response of inclined tube bundle.…”

Section: Introductionmentioning

confidence: 99%

Experimental study and thermal performance evaluation of staggered cross flow heat exchangers of semi-circular tubes: II- Effect of attack angle

A. Alghrubah,

ِA.Abd Elrahman

2021

Engineering Research Journal - Faculty of Engineering (Shoubra)

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Bundles of tubes in cross flow are one of the frequently types of heat exchangers, which used in several applications. Therefore, enhancing their performance directly affects the working costs. In the present work, a pair of semicircular tubes (SCTs) is suggested to replace complete circular tube (CCT). Their performance attributes are examined for staggered tube bundle at several rates of airflow across the bundle and at several attack angles of their bases; from zero to 90. It is reported that splitting the CCTs enhances the heat exchange rate as well growing the airflow resistance. Besides, increasing the base angle between 0 and 60 increases both the heat exchange and flow resistance. Their supreme increases are 105.1% and 47.4%, respectively, are obtained at 60 when compared with regular shape. While after 60 and below 90, increasing the angle reduces these increases. The hydrothermal performance Indicator (HTPI) is presented to weigh the performance qualities. It is reported that HTPI is augmented by increasing the angle until 60 while it is constricted with increasing the angle after 60.

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Application of the lattice Boltzmann method to the study of ultrasound propagation and acoustic streaming in three-dimensional cavities: advantages and limitations

Benhamou,

Vincent,

Miralles

et al. 2023

Theor. Comput. Fluid Dyn.

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A general approach of unit conversion system in lattice Boltzmann method and applications for convective heat transfer in tube banks

Cited by 12 publications

References 39 publications

Numerical Investigation of Conjugate Heat Transfer and Natural Convection Using the Lattice-Boltzmann Method for Realistic Thermophysical Properties

Numerical Investigation of Conjugate Heat Transfer and Natural Convection Using the Lattice-Boltzmann Method for Realistic Thermophysical Properties

Experimental study and thermal performance evaluation of staggered cross flow heat exchangers of semi-circular tubes: II- Effect of attack angle

Application of the lattice Boltzmann method to the study of ultrasound propagation and acoustic streaming in three-dimensional cavities: advantages and limitations

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