Simulation and Experimental Study on Thermal Conductivity of Nano-Granule Porous Material Based on Lattice-Boltzmann Method

Kan, Ankang; Mao, Shang; Wang, Ning; Shi, Bingling

doi:10.1007/s11630-019-1218-1

Cited by 14 publications

(9 citation statements)

References 21 publications

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“…Combined with the porosity analysis in Figure 7A, the thermal conductivity and porosity have the same trend. Generally, the thermal conductivity of air is less than that of inorganic materials 32,33 . The reduction of the thermal conductivity of porous materials can be considered from two aspects 33,34 .…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the thermal conductivity of air is less than that of inorganic materials 32,33 . The reduction of the thermal conductivity of porous materials can be considered from two aspects 33,34 . On the one hand, it can enhance the porosity 34 ; on the other hand, it can improve the thermal resistance of the matrix material itself 35 …”

Section: Resultsmentioning

confidence: 99%

“…32,33 The reduction of the thermal conductivity of porous materials can be considered from two aspects. 33,34 On the one hand, it can enhance the porosity 34 ; on the other hand, it can improve the thermal resistance of the matrix material itself. 35 Figure 9B shows the thermal conductivity of foamed ceramics with different titanium dioxide contents.…”

Section: Thermal Conductivitymentioning

confidence: 99%

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Utilization of gold tailings for the construction of foamed ceramics used in external insulation buildings

Duan

Meng

et al. 2022

Int J Applied Ceramic Tech

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The utilization of gold tailings and bentonite as raw materials for prepared foamed ceramic was studied. The effects of boric acid and titanium dioxide content on the properties and microstructures of foamed ceramic were studied from the aspects of bulk density, compressive strength, bending strength, phase composition, and micromorphology. These results show that the synergistic effect of boric acid and titanium dioxide leads to the crystallization of quartz, which enhanced the compressive strength and bending strength and decreased the thermal conductivity of foamed ceramics, while the bulk density increases gradually with the addition of titanium dioxide. Taking into account all of these properties, the optimal results are as follows: bending strength of 1.111 MPa, compressive strength of 1.165 MPa, bulk density of 0.258 g/cm3, the porosity of 81.89%, the thermal conductivity of 0.088 (W/(m⋅K)). This study indicated that gold tailings are a promising candidate for the preparation of foamed ceramics used as external insulation building materials.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Thermal Conductivitymentioning

confidence: 99%

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Utilization of gold tailings for the construction of foamed ceramics used in external insulation buildings

Duan

Meng

et al. 2022

Int J Applied Ceramic Tech

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“…[ 70 ] This approach has so far, to the best of knowledge of the author, not been applied to create aerogel nanostructures. However, LBM has been applied to simulate thermal conductivity [ 71,72 ] and phonon heat transport [ 73 ] in aerogels. The method, however, shows tremendous potential in its applicability to design organic and carbon aerogels.…”

Section: Particle‐aggregated Aerogelsmentioning

confidence: 99%

A Perspective on Methods to Computationally Design the Morphology of Aerogels

Rege

2022

Adv Eng Mater

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Reconstructing aerogel morphology presents significant challenges, in particular, if 3D visualizations of their mesoporous network are desired. Available microscopic and tomographic tools find it difficult to probe into all types of aerogels for the purposes of reconstructing their 3D nanoporous morphology. This is where computational approaches have shown promising efforts. Herein, diverse models that can be applied to describing different aerogels are explored. To begin with, cluster–cluster aggregation models are examined for simulating the sol–gel process and the resulting morphologies in fractal aerogels, e.g., silica‐based. Gaussian random field models and polymerization‐induced phase separation models are explored for modeling organic non‐fractal aerogels, e.g., resorcinol‐formaldehyde (RF) ones. This is followed by Langevin‐dynamics‐based discrete element models that are explored for simulating gelation in fibrillar aerogels, e.g., those from biopolymer sources. Lastly, modified Voronoi approaches are investigated for describing the 3D fibrillar morphology, also of fibrillar aerogels, like those from biopolymers. A perspective is presented highlighting the strengths as well as shortcomings in each of the model approaches. Possibilities to either extend available approaches or explore new ones are briefly discussed at every interval.

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“…In nucleation boiling, the geometry of nucleation sites due to micro-structure entirely effect on bubble dynamics. Recently, some numerical simulations [3][4][5] and experiments [6][7][8][9][10][11] have been performed to investigate boiling mechanism of artificial nucleation site by lattice Boltzmann method (LBM) [12][13][14][15][16][17][18][19][20][21]. Most of simulations only focus on nucleation sites.…”

Section: Introductionmentioning

confidence: 99%

Studying the effect of geometry of micro-cavity on pool boiling by LBM

Huang

Zhou²,

Huai³

et al. 2023

J. Phys.: Conf. Ser.

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Pool boiling heat transfer from structured surface is simulated numerically with a 3D OTRT (optimal two relaxation time) Lattice Boltzmann method. This work shows in detail that multiple bubbles grow and coalesce over hydrophilic (θ = 50°) surfaces in 3D view, heat flux transfers from heater surface to fluid, and temperature of heater surface varies with time. Specifically, four types of geometry in microstructure surfaces are examined and compared. It is found that heat flux of S5 is the highest and its wall temperature is the lowest. When compared with S0, the heat flux of S5~S7 increased a lot due to the easier formation of vapor blanket, and cubic shaped cavity alleviates largely this deterioration. Next, the large quantity of heat from the three phase contact line in the vicinity of side wall accounts for bubble nucleation and energy from the evaporation of thin liquid between bubbles and superheated wall helps bubbles to grow further. Besides, it is found that S5 increases nucleate site density, reduces boiling incipience superheat, and enhances remarkably heat transfer performance.

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Simulation and Experimental Study on Thermal Conductivity of Nano-Granule Porous Material Based on Lattice-Boltzmann Method

Cited by 14 publications

References 21 publications

Utilization of gold tailings for the construction of foamed ceramics used in external insulation buildings

Utilization of gold tailings for the construction of foamed ceramics used in external insulation buildings

A Perspective on Methods to Computationally Design the Morphology of Aerogels

Studying the effect of geometry of micro-cavity on pool boiling by LBM

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