Lattice Boltzmann simulation of convection melting in complex heat storage systems filled with phase change materials

Luo, Kang; Yao, Feng-Ju; Yi, Hong-Liang; Tan, He‐Ping

doi:10.1016/j.applthermaleng.2015.04.059

Cited by 92 publications

(28 citation statements)

References 43 publications

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“…The lattice Boltzmann method is relatively new compared to the classical approaches based on the Navier-Stokes equations. This technique has been used with a great success to simulate different physical behaviors of magnetohydrodynamic fluids [1,2], inhomogeneous mediums [3,4], phase change materials [5,6], flows with chemical reactions [7], and porous media [8,9].…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann Simulation of Natural Convection in an Annulus between a Hexagonal Cylinder and a Square Enclosure

Moutaouakil

Zrikem

Abdelbaki

2017

Mathematical Problems in Engineering

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Laminar natural convection in a water filled square enclosure containing at its center a horizontal hexagonal cylinder is studied by the lattice Boltzmann method. The hexagonal cylinder is heated while the walls of the cavity are maintained at the same cold temperature. Two orientations are treated, corresponding to two opposite sides of the hexagonal cross-section which are horizontal (case I) or vertical (case II). For each case, the results are presented in terms of streamlines, isotherms, local and average convective heat transfers as a function of the dimensionless size of the hexagonal cylinder cross-section (0.1≤B≤0.4), and the Rayleigh number (103≤Ra≤106).

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Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann Simulation of Natural Convection in an Annulus between a Hexagonal Cylinder and a Square Enclosure

Moutaouakil

Zrikem

Abdelbaki

2017

Mathematical Problems in Engineering

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“…Most of the existing thermal LB models for solid-liquid phase change can be generally classified into two major categories: the phase-field method [221][222][223][224][225][226][227][228] and the enthalpy-based method [54][55][56][57][58][75][76][77][78][79][80][81]194,[229][230][231][232][233][234][235][236][237][238][239][240][241][242][243][244][245][246]. Besides, a couple of LB models were recently developed based on some interface-tracking methods [180,247].…”

Section: The Lb Methods For Solid-liquid Phase-change Heat Transfermentioning

confidence: 99%

“…The liquid fraction l f is determined by Eq. In a recent study carried out by Luo et al [238], different enthalpy-based LB models for solid-liquid phase change have been tested and analyzed. They found that the HLBM-MRT scheme (i.e., MRT-LB model [110] for flow field, and enthalpy-based LB model [236] for temperature field) is more suitable for modeling convection dominated melting process.…”

Section: The Enthalpy-based Lb Modelsmentioning

confidence: 99%

Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review

Liu

et al. 2019

International Journal of Heat and Mass Transfer

204

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Since its introduction 30 years ago, the lattice Boltzmann (LB) method has achieved great success in simulating fluid flows and modeling physics in fluids. Owing to its kinetic nature, the LB method has the capability to incorporate the essential microscopic or mesoscopic physics, and it is particularly successful in modeling transport phenomena involving complex boundaries and interfacial dynamics.The LB method can be considered to be an efficient numerical tool for fluid flow and heat transfer in porous media. Moreover, since the LB method is inherently transient, it is especially useful for investigating transient solid-liquid phase-change processes wherein the interfacial behaviors are very important. In this article, a comprehensive review of the LB methods for single-phase and solid-liquid phase-change heat transfer in porous media at both the pore scale and representative elementary volume (REV) scale. The review first introduces the fundamentals of the LB method for fluid flow and heat transfer. Then the REV-scale LB method for fluid flow and single-phase heat transfer in porous media, and the LB method for solid-liquid phase-change heat transfer, are described. Some applications 2 of the LB methods for single-phase and solid-liquid phase-change heat transfer in porous media are provided. In addition, applications of the LB method to predict effective thermal conductivity of porous materials are also provided. Finally, further developments of the LB method in the related areas are discussed. Keyword: Lattice Boltzmann method; Single-phase heat transfer; Solid-liquid phase change; Porous media proposed the RLBE model with an enhanced collision operator, which was shown to be linearly stable. Based on the Bhatnagar-Gross-Krook (BGK) collision operator [104], the LB model using a single relaxation time, referred to as the BGK-LB model, has been independently proposed by Chen et al. [14], Koelman [15], and Qian et al. [16]. In the BGK-LB model, the equilibrium distribution function is chosen to recover the incompressible N-S equations in the incompressible limit. Due to its high efficiency and extreme simplicity, the BGK-LB model has become the most popular LB model, in spite of some well-known deficiencies (e.g., numerical instability, viscosity dependence of boundary 9 locations). Almost at the same time when the BGK-LB method was developed, d'Humières [17] proposed the multiple-relaxation-time (MRT) LB method. The MRT-LB equation (also referred to as generalized lattice Boltzmann equation (GLBE)) is an important extension of the RLBE proposed by Higuera et al. [12,13]. This work is significant because, in addition to it overcomes some deficiencies of the BGK-LB model, it facilitates the extension of the LB method, expanding the applications to a much wider range of phenomena and processes.In 1997, a direct connection between the LB equation and the continuous Boltzmann equation in kinetic theory was rigorously established by He and Luo [19,20]. In particular, it has been demonstrated that the LB equation c...

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“…It was noticed that with an increase in number of HTF tubes from 1 to 4, the melting time was reduced by 29%. Likewise, Luo et al [26] numerically examined the effect of HTF tubes number and their orientations in horizontal shell-and-tube heat exchanger on thermal performance. It was noticed that melting time for single HTF tube was 5 times as compared to nine HTF tubes case.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of charging/melting cycles of paraffin in a novel shell and tube with longitudinal fins based heat storage design solution for domestic and industrial applications

Khan

2017

Applied Energy

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Due to vulnerability of solar energy based technologies to weather fluctuations and variations in solar thermal irradiance, thermal energy storage (TES) systems with their high thermal storage capacity offer a sustainable solution. In this article, experimental investigations are conducted to identify thermal performance of latent heat storage (LHS) unit in connection with flat plate solar collector during charging cycles. LHS unit is comprised of novel geometrical configuration based shell-andtube heat exchanger with longitudinal fins, paraffin as thermal storage material and water as heat transfer fluid (HTF). In order to overcome the effect of low thermal conductivity of paraffin, the effective surface area and overall thermal conductivity for heat transfer is significantly improved by employing longitudinal fins. Moreover, the vertical orientation of longitudinal fins supports natural convection, which can assure rapid charging of paraffin in LHS unit. In experimental tests, the focus is on probing the heat transfer mechanism and temperature distribution in entire novel LHS unit, the influence of inlet temperature and volume flow rate of HTF on phase transition rate and mean power. Experimental results revealed that natural convection significantly influences the phase transition rate. Therefore, enthalpy gradient is noticed between paraffin at top, central and bottom positions in LHS unit. Likewise, the phase transition rate and mean power of LHS unit is significantly increased by a fraction of 50.08% and 69.71% as the inlet temperature of HTF is increased from 52 o C to 67 o C, respectively. Similarly, it is concluded that volume flow rate of HTF has a relatively moderate influence on thermal performance; however the influence declines with an increase in inlet temperature of HTF. Due to significant enhancement in thermal performance, the novel geometrically configured LHS unit can accumulate about 14.36 MJ of thermal energy in as less as 3 hours. Furthermore, a broad range of domestic and commercial energy demands can be fulfilled by simply assembling several LHS units in parallel sequence.

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Lattice Boltzmann simulation of convection melting in complex heat storage systems filled with phase change materials

Cited by 92 publications

References 43 publications

Lattice Boltzmann Simulation of Natural Convection in an Annulus between a Hexagonal Cylinder and a Square Enclosure

Lattice Boltzmann Simulation of Natural Convection in an Annulus between a Hexagonal Cylinder and a Square Enclosure

Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review

Experimental investigations of charging/melting cycles of paraffin in a novel shell and tube with longitudinal fins based heat storage design solution for domestic and industrial applications

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