Lattice Boltzmann model for a steady radiative transfer equation

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

doi:10.1103/physreve.94.023312

Cited by 39 publications

(4 citation statements)

References 60 publications

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“…Lattice Boltzmann method (LBM) has been introduced as an efficient numerical method for simulating fluid flows and heat transfer in fluids, recently [1][2][3][4][5]. LBM has lots of advantages such as providing a physical meaning of a problem, simple computer implementation as well as parallel programming, easy employing for complicated geometries and boundary conditions and accurate results [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of transient conduction–radiation heat transfer in a square cavity using combination of LBM and FVM

Keshtkar

Talebizadehsardari

2018

Sādhanā

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In this paper, the effect of surface radiation in a square cavity containing an absorbing, emitting and scattering medium with four heated boundaries is investigated, numerically. Lattice Boltzmann method (LBM) is used to solve the energy equation of a transient conduction-radiation heat transfer problem and the radiative heat transfer equation is solved using finite-volume method (FVM). In this work, two different heat flux boundary conditions are considered for the east wall: a uniform and a sinusoidally varying heat flux profile. The results show that as the value of conduction-radiation decreases, the dimensionless temperature in the medium increases. Also, it is clarified that, for an arbitrary value of the conduction-radiation parameter, the temperature decreases with decreasing scattering albedo. It is observed that when the boundaries reflect more, a higher temperature is achieved in the medium and on boundaries.

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Section: Introductionmentioning

confidence: 99%

Investigation of transient conduction–radiation heat transfer in a square cavity using combination of LBM and FVM

Keshtkar

Talebizadehsardari

2018

Sādhanā

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“…Numerical investigations have sought to optimize the size parameters and size distribution of particles to maximize solar reflection. [ 68 , 77 , 78 ] To analyze different particle coating designs with large thickness, various simulation tools such as Monte Carlo simulation, [ 79 , 80 , 81 ] Lattice Boltzman model, [ 82 , 83 ] finite element method, [ 77 ] and finite‐difference‐time‐domain [ 84 ] have been used. Other approaches include using multiple materials such as mixing different particles [ 41 , 72 ] or utilizing core–shell structures [ 81 , 85 ] for complete back‐scattering.…”

Section: Materials and Structure Designsmentioning

confidence: 99%

Radiative Cooling for Energy Sustainability: From Fundamentals to Fabrication Methods Toward Commercialization

So,

Yun,

et al. 2023

Advanced Science

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Radiative cooling, a technology that lowers the temperature of terrestrial objects by dissipating heat into outer space, presents a promising ecologically‐benign solution for sustainable cooling. Recent years witness substantial progress in radiative cooling technologies, bringing them closer to commercialization. This comprehensive review provides a structured overview of radiative cooling technologies, encompassing essential principles, fabrication techniques, and practical applications, with the goal of guiding researchers toward successful commercialization. The review begins by introducing the fundamentals of radiative cooling and the associated design strategies to achieve it. Then, various fabrication methods utilized for the realization of radiative cooling devices are thoroughly discussed. This discussion includes detailed assessments of scalability, fabrication costs, and performance considerations, encompassing both structural designs and fabrication techniques. Building upon these insights, potential fabrication approaches suitable for practical applications and commercialization are proposed. Further, the recent efforts made toward the practical applications of radiative cooling technology, including its visual appearance, switching capability, and compatibility are examined. By encompassing a broad range of topics, from fundamental principles to fabrication and applications, this review aims to bridge the gap between theoretical research and real‐world implementation, fostering the advancement and widespread adoption of radiative cooling technology.

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“…Particularly, no studies have employed a polydisperse sphere model with continuous size values or considered the binder material. Other numerical methods, such as Monte Carlo , or Lattice Boltzmann model, , have also been employed to solve the radiative heat transfer equations to predict the optical properties of coatings. However, these methods do not consider the random scattering effects of the individual particle geometry.…”

Section: Introductionmentioning

confidence: 99%

Optimally Designed Multimaterial Microparticle–Polymer Composite Paints for Passive Daytime Radiative Cooling

Yun

Chae

et al. 2023

ACS Photonics

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Passive daytime radiative cooling (PDRC) devices have enabled subambient cooling of terrestrial objects without any energy input, offering great potential to future clean energy technology. Among various PDRC structures, random dielectric particles in a polymer matrix or paint-like coatings have displayed powerful radiative cooling performances with excellent scalability and easy fabrication. While modeling and analyzing such a system is nontrivial to enhance the cooling effect and engineer the structures to be utilized in various applications, it is essential to understand its complex physical relations and determine the optimal design conditions. In this work, we have thoroughly analyzed the optical properties and radiative cooling performances of PDRC paints composed of two-material particles (SiO2 and Al2O3) using 2D FDTD simulation and investigated the optimal design conditions. Specifically, we have studied the effects of design parameters, such as particle size, size distribution, binder volume ratio, and coating thickness. Subsequently, we have conducted an outdoor cooling measurement of the fabricated PDRC paints to demonstrate their radiative cooling potential and to analyze and understand their performance based on our numerical investigations. The fabricated PDRC paints exhibited high solar reflectance (0.958) and strong long-wave infrared emission (0.937) in the atmospheric transparency window, achieving a maximum temperature drop of 9.1 °C. This comprehensive study provides a detailed characterization of the structure and material parameters of the multimaterial PDRC paint system.

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Lattice Boltzmann model for a steady radiative transfer equation

Cited by 39 publications

References 60 publications

Investigation of transient conduction–radiation heat transfer in a square cavity using combination of LBM and FVM

Investigation of transient conduction–radiation heat transfer in a square cavity using combination of LBM and FVM

Radiative Cooling for Energy Sustainability: From Fundamentals to Fabrication Methods Toward Commercialization

Optimally Designed Multimaterial Microparticle–Polymer Composite Paints for Passive Daytime Radiative Cooling

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