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学者姓名:陶文铨

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< Page ,Total 122 >
Numerical investigation of tube bundle arrangement effect on falling film fluid flow and heat transfer EI
期刊论文 | 2022 , 201 | Applied Thermal Engineering
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Abstract :

Falling film heat transfer, an advanced technology, has been widely applied in the refrigeration and desalination system and beyond. Numerical simulations are conducted aiming to investigate the impacts of liquid flow rate, distributor height, tube pitch and tube bundle arrangement on the falling film hydrodynamics and heat transfer performance in the tube bundles. The liquid film thickness (LFT), heat transfer coefficient (HTC) and bundle effect are obtained under various conditions. The results indicated that: (1) the calculation results are in good consistent with the previous studies in both LFT and HTC; (2) various inter-column flow patterns, solitary wave, droplet and liquid bridge are widely observed; (3) the velocity fluctuation due to the pulsatile droplet impacting or liquid column impingement is one of the fundamental causes of bundle effect; (4) bundle effect universally exists in the falling film tube bundle, and varies with the liquid flow rate, distributor height, tube pitch and tube bundle arrangement; (5) the triangular and square tube bundles behave the best and the worst in the average HTC of the tube bundle, respectively, while the square tube bundle and rotated square tube bundle provide the largest and the smallest bundle effect, respectively. © 2021 Elsevier Ltd

Keyword :

Liquid films Drops Tubes (components) Heat transfer coefficients Solitons Film thickness Desalination Computational fluid dynamics

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GB/T 7714 Zhao, Chuang-Yao , Yao, Zhuo-Liang , Qi, Di et al. Numerical investigation of tube bundle arrangement effect on falling film fluid flow and heat transfer [J]. | Applied Thermal Engineering , 2022 , 201 .
MLA Zhao, Chuang-Yao et al. "Numerical investigation of tube bundle arrangement effect on falling film fluid flow and heat transfer" . | Applied Thermal Engineering 201 (2022) .
APA Zhao, Chuang-Yao , Yao, Zhuo-Liang , Qi, Di , Ji, Wen-Tao , Li, An-Gui , Tao, Wen-Quan . Numerical investigation of tube bundle arrangement effect on falling film fluid flow and heat transfer . | Applied Thermal Engineering , 2022 , 201 .
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Numerical study of SALSCS demonstration unit in Xi 'an, China, with non-uniform solar irradiation EI SCIE
期刊论文 | 2021 , 173 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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Abstract :

Solar-Assisted Large-Scale Cleaning System (SALSCS) is a new attempt to alleviate outdoor air pollution by using solar energy. A demonstration unit was built in Xi'an, China, in 2016. Field tests and numerical simulations were carried out on the demonstration unit in January 2017. Results show that the thermal airflow rate of the south collector is well predicted, while that of the north collector is seriously overestimated, with a deviation between the simulated value and the measured value being as larger as 47.07%. In this paper, an improved numerical simulation method considering the non-uniformity of solar irradiation, the effects of weather condition and the photovoltaic panels of the collector top is presented. Simulation results show that the deviation between the simulated thermal airflow rate of the north collector and the measured value is only 2.13%. Photovoltaic panels on the collector top have a little influence on the thermal airflow rate of the collectors. If the roof of the north and south collectors is covered with all photovoltaic panels, the thermal airflow rate will be reduced only by 6.93% and 7.99%, respectively. (C) 2021 Elsevier Ltd. All rights reserved.

Keyword :

PV CFD Solar chimney Non-uniform solar radiation Solar-assisted large-scale cleaning system

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GB/T 7714 Huang, Ming-Hua , He, Ya-Ling , Feng, Zhen-Ping et al. Numerical study of SALSCS demonstration unit in Xi 'an, China, with non-uniform solar irradiation [J]. | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2021 , 173 .
MLA Huang, Ming-Hua et al. "Numerical study of SALSCS demonstration unit in Xi 'an, China, with non-uniform solar irradiation" . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 173 (2021) .
APA Huang, Ming-Hua , He, Ya-Ling , Feng, Zhen-Ping , Cao, Jun-Ji , Tao, Wen-Quan . Numerical study of SALSCS demonstration unit in Xi 'an, China, with non-uniform solar irradiation . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2021 , 173 .
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Thermal conductivity of nafion molecular chain based on first-principle calculation EI
期刊论文 | 2021 , 51 (12) , 1123-1133 | Heat Transfer Research
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The thermal conductance in Nafion molecular chain is investigated by VASP, Phonopy, and ShengBTE based on the first-principle calculation. By using the mechanical structural analysis and chemical bond analysis of crystal orbital overlap population, the strength of carbon-carbon bond, carbon-oxygen bond, and carbon-sulfur bond is discussed. Combined with the pDOS (phonon density of state) analysis, we have determined that the backbone linked by carbon-carbon bonds is always the main route of phonon transport in the Nafion molecular chain, and the branches with sulfonate ions also play a non-negligible phonon transfer role in the local molecular chains. The results of thermal conductivity calculation prove the above analysis that the thermal conductivity of the Nafion molecular chain is much higher than that of the bulk/ membrane, but still at a lower level [12C/13C graphene superlattice). © 2020 by Begell House, Inc. www.begellhouse.com

Keyword :

Carbon Phonons Covalent bonds Chemical analysis Thermal conductivity

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GB/T 7714 Nie, Yi-Nan , Chen, Lei , Tao, Wen-Quan . Thermal conductivity of nafion molecular chain based on first-principle calculation [J]. | Heat Transfer Research , 2021 , 51 (12) : 1123-1133 .
MLA Nie, Yi-Nan et al. "Thermal conductivity of nafion molecular chain based on first-principle calculation" . | Heat Transfer Research 51 . 12 (2021) : 1123-1133 .
APA Nie, Yi-Nan , Chen, Lei , Tao, Wen-Quan . Thermal conductivity of nafion molecular chain based on first-principle calculation . | Heat Transfer Research , 2021 , 51 (12) , 1123-1133 .
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Numerical study on thermal contact resistance of 8-harness satin woven pierced composite EI SCIE
期刊论文 | 2021 , 159 | International Journal of Thermal Sciences
WoS CC Cited Count: 2
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Abstract :

In this paper, thermal contact resistance between a pair of 8-harness satin woven pierced composites is numerically investigated when the interface gaps are filled with air. Numerical model of the rough surfaces is based on measured results of actual specimens by a microscope. The results show that thermal contact resistance decreases with an increase in both loading pressure and temperature. The effects of interfacial thermal radiation on the predicted thermal contact resistance increase with an increase in temperature, but less than 5%. The percentage of heat transfer rate through solid contact regions occupies less than 17% of overall heat transfer rate for the cases studied with solid thermal conductivity around 10 W·m−1·K−1 and loading pressure up to 2.37 MPa. For the studied composite pair (averaged surface roughness of 12.30 μm, 10.54 μm) thermal contact resistance is in a range of 9.8 × 10−4 - 5.7 × 10−4 K·m2·W−1. © 2020 Elsevier Masson SAS

Keyword :

Surface roughness Contact resistance Thermal conductivity of solids Heat transfer Radiation effects Silk

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GB/T 7714 Ren, Xing-Jie , Dai, Yan-Jun , Gou, Jian-Jun et al. Numerical study on thermal contact resistance of 8-harness satin woven pierced composite [J]. | International Journal of Thermal Sciences , 2021 , 159 .
MLA Ren, Xing-Jie et al. "Numerical study on thermal contact resistance of 8-harness satin woven pierced composite" . | International Journal of Thermal Sciences 159 (2021) .
APA Ren, Xing-Jie , Dai, Yan-Jun , Gou, Jian-Jun , Tao, Wen-Quan . Numerical study on thermal contact resistance of 8-harness satin woven pierced composite . | International Journal of Thermal Sciences , 2021 , 159 .
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Experimental study on thermal contact resistance of carbon fiber reinforced silicon carbide composite with 3D needled preform (3DN C/SiC) EI SCIE
期刊论文 | 2021 , 124 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
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Abstract :

In this paper, thermal contact resistance (TCR) of three different contacts of a composite are experimentally investigated when the contact interfaces are filled with air. The surface roughnesses of the three contacts are 0.95/16.91 mu m (Contact A, titanium alloy/composite), 9.54/9.73 mu m (Contact B, composite/composite), and 11.53/6.85 mu m (Contact C, composite/titanium alloy). The measured TCRs of the three contacts decrease with an increase in loading pressure and interface temperature. For Contact B, the effect of temperature on thermal contact resistance gradually decreases with an increasing loading pressure. For Contact C when loading pressure increases to 3.6 MPa, the decreasing trend of the thermal contact resistance with increasing loading pressure becomes mild. Additionally, experimental uncertainties are analyzed and calculated.

Keyword :

Thermal contact resistance Thermal properties 3 DN C/SiC composite

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GB/T 7714 Ren, Xing-Jie , Ding, Hao , Dai, Yan-Jun et al. Experimental study on thermal contact resistance of carbon fiber reinforced silicon carbide composite with 3D needled preform (3DN C/SiC) [J]. | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2021 , 124 .
MLA Ren, Xing-Jie et al. "Experimental study on thermal contact resistance of carbon fiber reinforced silicon carbide composite with 3D needled preform (3DN C/SiC)" . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 124 (2021) .
APA Ren, Xing-Jie , Ding, Hao , Dai, Yan-Jun , Tu, Jian-Yong , Chen, Xu , He, Jiang-Yi et al. Experimental study on thermal contact resistance of carbon fiber reinforced silicon carbide composite with 3D needled preform (3DN C/SiC) . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2021 , 124 .
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Investigation of water bubble nucleation by using molecular dynamics simulation EI SCIE
期刊论文 | 2021 , 334 | JOURNAL OF MOLECULAR LIQUIDS
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Generation of a bubble nucleus is the initial stage of nucleate boiling and an essential part of the nucleate boiling theory. In the present study, the molecular dynamics simulation method is conducted to study the bubble nucleation of water on a grooved copper substrate with hydrophilicity. An idea based on the competition between molecular kinetic energy and molecular potential restriction, corresponding to the motivity and resistance for bubble nucleation at the nanoscale, is extended to identify the intrinsic regime of bubble nucleation of water. If a group of water molecules obtain enough kinetic energy such that their potential restriction is broken and become activated molecules at some time, the bubble nucleus is taken shape. Simulation results of bubble nucleation behaviors on the substrate with different sizes of grooves indicate that this idea works well in clarifying the intrinsic regimes of bubble nucleation and the nucleation difference between different cases. In addition, this idea can be used to obtain the incipient nucleation position, nucleation time, and the volume of the bubble nucleus without any subjective threshold. (C) 2021 Elsevier B.V. All rights reserved.

Keyword :

Water molecules Bubble nucleation Intrinsic regime Molecular dynamics simulation

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GB/T 7714 Chen, Yu-Jie , Chen, Xue-Jiao , Yu, Bo et al. Investigation of water bubble nucleation by using molecular dynamics simulation [J]. | JOURNAL OF MOLECULAR LIQUIDS , 2021 , 334 .
MLA Chen, Yu-Jie et al. "Investigation of water bubble nucleation by using molecular dynamics simulation" . | JOURNAL OF MOLECULAR LIQUIDS 334 (2021) .
APA Chen, Yu-Jie , Chen, Xue-Jiao , Yu, Bo , Zhou, Wen-Jing , Cao, Qun , Tao, Wen-Quan . Investigation of water bubble nucleation by using molecular dynamics simulation . | JOURNAL OF MOLECULAR LIQUIDS , 2021 , 334 .
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A robustness-enhanced method for Riemann solver EI SCIE
期刊论文 | 2021 , 166 | International Journal of Heat and Mass Transfer
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The appearance of shock anomaly is a major unsolved problem for some low diffusion schemes when simulating the hypersonic flow. In this paper, a simple method is proposed to enhance the robustness of the low diffusion schemes to overcome the shock anomaly. The main idea of this method is adding an appropriate extra term to the original low diffusion schemes without influencing the accuracy in aerodynamic heating prediction. This extra term is derived from the difference between the flux splitting scheme (FVS) and the advection upstream splitting method+ (AUSM+). Adding this term to three low diffusion schemes, seven typical numerical tests are conducted to examine the capability of those schemes. Numerical results show that the three new schemes turn out to be carbuncle-free and shock-stable without losing their original accuracy in prediction of aerodynamic heating, validating the feasibility and reliability of the proposed method. © 2020

Keyword :

Aerodynamic heating Hypersonic flow Aerodynamics Numerical methods Diffusion

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GB/T 7714 Guo, Shaolong , Tao, Wen-Quan . A robustness-enhanced method for Riemann solver [J]. | International Journal of Heat and Mass Transfer , 2021 , 166 .
MLA Guo, Shaolong et al. "A robustness-enhanced method for Riemann solver" . | International Journal of Heat and Mass Transfer 166 (2021) .
APA Guo, Shaolong , Tao, Wen-Quan . A robustness-enhanced method for Riemann solver . | International Journal of Heat and Mass Transfer , 2021 , 166 .
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Mesoscopic modeling impacts of liquid water saturation, and platinum distribution on gas transport resistances in a PEMFC catalyst layer EI SCIE
期刊论文 | 2021 , 388 | ELECTROCHIMICA ACTA
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Abstract :

The oxygen transport resistance in catalyst layer of proton-exchange-membrane fuel cells has garnered much attention because it increases dramatically with the decreasing platinum loading. In this paper, the local transport behaviors of oxygen in electrode with different liquid water saturations, and platinum distributions are explored at mesoscopic level. The two-phase flow regime in electrode is simulated via a multicomponent multiphase flow model to reconstruct the liquid water morphologies. The effective oxygen diffusivities under wet conditions, the limiting current density, and the electrode resistance are numerically obtained before determining the local transport resistance. The results demonstrate that the effective oxygen diffusivities under wet condition decrease with the contact angle of the electrode. The limiting current density decreases with the liquid water saturation due to the blockage of ionomer sur -face area and the decreasing pore size distribution. The contribution of ionomer and liquid water to the electrode resistance dominates for the electrode resistance at low platinum loading. The local transport resistance of hydrophilic electrodes increases dramatically if the oxygen permeation in liquid water is ex-cluded. More platinum particles distributed near the gas diffusion layer are beneficial for the reduction of the local transport resistance.& nbsp; (c) 2021 Elsevier Ltd. All rights reserved.

Keyword :

Platinum distribution Oxygen transport resistance Mesoscopic modeling Lattice Boltzmann method Liquid water saturation

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GB/T 7714 Mu, Yu-Tong , Yang, Shu-Ran , He, Pu et al. Mesoscopic modeling impacts of liquid water saturation, and platinum distribution on gas transport resistances in a PEMFC catalyst layer [J]. | ELECTROCHIMICA ACTA , 2021 , 388 .
MLA Mu, Yu-Tong et al. "Mesoscopic modeling impacts of liquid water saturation, and platinum distribution on gas transport resistances in a PEMFC catalyst layer" . | ELECTROCHIMICA ACTA 388 (2021) .
APA Mu, Yu-Tong , Yang, Shu-Ran , He, Pu , Tao, Wen-Quan . Mesoscopic modeling impacts of liquid water saturation, and platinum distribution on gas transport resistances in a PEMFC catalyst layer . | ELECTROCHIMICA ACTA , 2021 , 388 .
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Liquid film boiling on plain and structured tubular surfaces with and without hydrophobic coating EI SCIE
期刊论文 | 2021 , 125 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
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In this study, thin liquid film boiling heat transfer characteristics of R134a on a plain and two finned tubular surfaces were experimentally investigated. The dependence of heat transfer coefficient (HTC) on the composite effects of microstructure and hydrophobic coating was characterized. It is found that HTC increases monotonously with increasing heat flux until reaching a threshold heat flux (THF), beyond which the HTC starts to descend. The THF is highest for the plain surface and lowest for the boiling-enhanced surface due to the effect of reentrant cavities. The boiling-enhanced surface shows larger HTC under low heat fluxes (less than 60 kW m(-2)) compared with the condensation-enhanced counterpart, whereas the latter one is superior when the heat flux exceeds 60 kW m(-2). Hydrophobic coating can substantially intensify the liquid film boiling heat transfer on boiling-enhanced finned surface with reentrant cavities. The intensification of heat transfer is more prominent in cases of high heat flux.

Keyword :

Low surface tension fluid Liquid film boiling Reentrant cavity Hydrophobic coating

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GB/T 7714 Jin, Pu-Hang , Mostafa, Ibrahim , He, Peng et al. Liquid film boiling on plain and structured tubular surfaces with and without hydrophobic coating [J]. | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2021 , 125 .
MLA Jin, Pu-Hang et al. "Liquid film boiling on plain and structured tubular surfaces with and without hydrophobic coating" . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 125 (2021) .
APA Jin, Pu-Hang , Mostafa, Ibrahim , He, Peng , Zhang, Zhuo , Zhao, Chuang-Yao , Ji, Wen-Tao et al. Liquid film boiling on plain and structured tubular surfaces with and without hydrophobic coating . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2021 , 125 .
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Field synergy principle: Its scientific beauty and relationship with entransy theory EI
期刊论文 | 2021 , 51 (10) , 1155-1165 | Scientia Sinica Technologica
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From the six aspects of the beauty of science, this paper analyzes and discusses the beauty of the science of the field synergy principle (FSP) proposed by Guo. Its clear concept, elegant derivation, and wide application are analyzed. Its naturality, symmetry, and analogy are discussed. Finally, the inherent relationship between FSP and entransy theory is revealed. The paper shows that FSP and entransy theory prove and complement each other, and thus both play important roles in improving and promoting the development of knowledge of heat transfer. © 2021, Science Press. All right reserved.

Keyword :

Heat transfer

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GB/T 7714 Tao, Wenquan , He, Yaling . Field synergy principle: Its scientific beauty and relationship with entransy theory [J]. | Scientia Sinica Technologica , 2021 , 51 (10) : 1155-1165 .
MLA Tao, Wenquan et al. "Field synergy principle: Its scientific beauty and relationship with entransy theory" . | Scientia Sinica Technologica 51 . 10 (2021) : 1155-1165 .
APA Tao, Wenquan , He, Yaling . Field synergy principle: Its scientific beauty and relationship with entransy theory . | Scientia Sinica Technologica , 2021 , 51 (10) , 1155-1165 .
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