The effect of particles size distribution on aesthetic and thermal performances of polydisperse TiO2 pigmented coatings: Comparison between numerical and experimental results

Baneshi, Mehdi; Gonome, Hiroki; Komiya, Atsuki; Maruyama, Shigenao

doi:10.1016/j.jqsrt.2012.02.006

Cited by 40 publications

(14 citation statements)

References 19 publications

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“…Actually, the particles can make an agglomeration state, and the particle size distribution can change. It affects the spectral radiative properties of the particle cloud [18,19]. However, the effect of agglomeration was neglected to simplify the calculation.…”

Section: Radiative Transfer Analysismentioning

confidence: 99%

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Gonome

Yamada

2018

Coatings

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Abstract:In this paper, a method of optimizing a thermal barrier cosmetic and spectral selective cosmetic by controlling the particle size and material is proposed as a countermeasure to heatstroke. The radiative properties of single cosmetic particles of a wide range of particle sizes and wavelengths in non-absorbing air were calculated in this study based on the Mie theory. Al 2 O 3 , TiO 2 , Au, and Ag were used as the material of the cosmetic particle. The radiative property of a particle cloud in dependent scattering was calculated. The radiative transfer in the cosmetic layer was analyzed, and the spectral reflectance of the cosmetic layer on the human skin was calculated. A new parameter was defined to quantitatively evaluate the performance of the thermal barrier cosmetic and spectral selective cosmetic. For the thermal barrier cosmetic, the Al 2 O 3 particle was determined to be suitable, and its size was optimized. For the spectral selective cosmetic, the Au particle was likewise determined to be suitable, and its size was optimized. Our cosmetics satisfied both aesthetic and thermal concerns.

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Section: Radiative Transfer Analysismentioning

confidence: 99%

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Gonome

Yamada

2018

Coatings

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“…In previous studies [7,11,14,15], the optimization parameter was defined to find the suitable pigment particle. The performance parameter of pigmented coating for solar reflectance in the solar spectrum region is proposed as [12] ρ TSR ¼ where I(λ) is the solar irradiation and ρ(λ) is the spectral reflectance of the pigmented coating.…”

Section: Definition Of Optimization Parametermentioning

confidence: 99%

Control of thermal barrier performance by optimized nanoparticle size and experimental evaluation using a solar simulator

Gonome

Baneshi

Okajima

et al. 2014

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Modeling of the reflectance and transmittance of scattering media has been an area of interest for decades, since particle suspensions are ubiquitous in nature (e.g. clouds) and are utilized for practical effect in artificial materials such as coatings and paints [1][2][3][4]. The random distribution of the scattering elements makes it impossible to solve these systems analytically; instead Monte Carlo methods are often used requiring a long computational time to obtain accurate results.…”

Section: Introductionmentioning

confidence: 99%

“…the capability to analyze the impact of absorbing matrices, 2. an implementation with an admix of different kinds of scatterers including different particle sizes and particle compo-sitions, 3. a systematic way to implement particle size distributions, 4. a clear and specific methodology to determine model parameters, 5.…”

Section: Introductionmentioning

confidence: 99%

Extending the applicability of the four-flux radiative transfer method

et al. 2017

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A generalized four-flux method capable of modeling and tuning the spectral reflectance of a diverse range of complex composite coatings is presented. An example application is exploring and maximizing the visible and near-infrared (IR) spectral reflectance available from the diverse structures arising from combinations of the many practical paint ingredients that are available or can be made when applied to different substrates. This requires consideration of scatterers that can differ in composition, particle size, size distribution, and fill factor, and are held in place by a variety of organic binders, which typically partially absorb in the near IR. This extended model is further enhanced by an explicit matrix algorithm that allows analysis of diverse multilayer stacks. This is applied to a multilayer and is designed to model useful changes that result from varying the pigment fill factor as a function of depth within a layer. What we believe is a novel feature is the way the scattering affects matrix absorptance. The model includes contributions to total absorptance from the scattering pigments and from the paint binder that can arise in different bands or simultaneously at the same wavelengths. Model accuracy is demonstrated by example results when compared to experimental data on dried single layer paint profiles using imaged cross sections. The model input covering the actual pigment and binder properties used are material, shape, size, and size distributions, mass added, and the measured optical constants from 400 nm to 2,500 nm of the undoped binder resin layer. One interesting result is the comparison of a two-layered stack, with bigger particles in the first layer and smaller ones in the second, to one with the opposite depth profile.

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The effect of particles size distribution on aesthetic and thermal performances of polydisperse TiO2 pigmented coatings: Comparison between numerical and experimental results

Cited by 40 publications

References 19 publications

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

Control of thermal barrier performance by optimized nanoparticle size and experimental evaluation using a solar simulator

Extending the applicability of the four-flux radiative transfer method

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