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学者姓名:陶文铨

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< Page ,Total 109 >
Coupled MLPG-FVM simulation of steady state heat conduction in irregular geometry EI Scopus SCIE
期刊论文 | 2019 , 100 , 265-275 | Engineering Analysis with Boundary Elements
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Abstract :

The two-dimensional steady-state heat conduction in irregular geometry is solved by a MLPG-FVM coupled method. The meshless local Petrove-Galerkin (MLPG) method is applied to the sub-region with skewed wall surface while the finite volume method (FVM) is used in the rest of the domain. The Dirichlet-Dirichlet method is adopted to couple the temperature between MLPG and FVM methods. In MLPG method, the Dirac's Delta function is taken as the test function to avoid the local domain integration which does not need the numerical integration and the solution is independent of the size of the test function. The proposed MLPG-FVM method is validated and proved to be an efficient numerical method for 2-D heat conduction in irregular geometry, which can exert their own advantages of MLPG and FVM. © 2017 Elsevier Ltd.

Keyword :

Coupled MLPG-FVM method Dirac's delta function Dirichlet Efficient numerical method Irregular domains Irregular geometries Numerical integrations Test functions

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GB/T 7714 Li, Zeng-Yao , Chen, Zheng-Ji , Wu, Xue-Hong et al. Coupled MLPG-FVM simulation of steady state heat conduction in irregular geometry [J]. | Engineering Analysis with Boundary Elements , 2019 , 100 : 265-275 .
MLA Li, Zeng-Yao et al. "Coupled MLPG-FVM simulation of steady state heat conduction in irregular geometry" . | Engineering Analysis with Boundary Elements 100 (2019) : 265-275 .
APA Li, Zeng-Yao , Chen, Zheng-Ji , Wu, Xue-Hong , Tao, Wen-Quan . Coupled MLPG-FVM simulation of steady state heat conduction in irregular geometry . | Engineering Analysis with Boundary Elements , 2019 , 100 , 265-275 .
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Falling film evaporation and nucleate pool boiling heat transfer of R134a on the same enhanced tube EI Scopus SCIE
期刊论文 | 2019 , 147 , 113-121 | Applied Thermal Engineering
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Abstract :

Falling film evaporation and pool boiling of R134a outside a typical reentrant enhanced tube was investigated with an experimental approach. Experimental data from literature with other refrigerants were also compared. The saturation temperature was 11 °C. It was found that the overall heat transfer coefficient for the enhanced tube was as much as 3 times higher than smooth tube. Shell-side falling film evaporation heat transfer coefficient increased by a factor of 2.1–4.9. Pool boiling yielded a higher heat transfer coefficient at higher heat flux for the same enhanced tube. The dependence of falling film evaporation heat transfer coefficient on the heat flux was also different from pool boiling for the same tube. Although the bubbles in pool boiling were pushed up by buoyancy and in falling film evaporating were driven by the flow of films, the transmission of energy were both dominated by the phase change heat transfer. The contribution of forced convection to falling film evaporation heat transfer coefficient is weak compared with phase change heat transfer. © 2018

Keyword :

Enhanced tubes Experimental approaches Falling-film evaporation Nucleate pool boiling heat transfers Overall heat transfer coefficient Phase change heat transfer Saturation temperature Tube Bundle

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GB/T 7714 Ji, Wen-Tao , Zhao, Er-Tao , Zhao, Chuang-Yao et al. Falling film evaporation and nucleate pool boiling heat transfer of R134a on the same enhanced tube [J]. | Applied Thermal Engineering , 2019 , 147 : 113-121 .
MLA Ji, Wen-Tao et al. "Falling film evaporation and nucleate pool boiling heat transfer of R134a on the same enhanced tube" . | Applied Thermal Engineering 147 (2019) : 113-121 .
APA Ji, Wen-Tao , Zhao, Er-Tao , Zhao, Chuang-Yao , Zhang, Hu , Tao, Wen-Quan . Falling film evaporation and nucleate pool boiling heat transfer of R134a on the same enhanced tube . | Applied Thermal Engineering , 2019 , 147 , 113-121 .
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A sharp-interface model coupling VOSET and IBM for simulations on melting and solidification EI Scopus SCIE
期刊论文 | 2019 , 178 , 113-131 | Computers and Fluids
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Abstract :

This article presents a sharp-interface model for solving solid-liquid phase change of pure materials. An interface capturing method combining VOF and level set, VOSET, is employed to track the moving interface during phase change, and the level-set function generated in VOSET is used to consider the effect of the phase boundary when solving the fields of temperature and velocity. In order to deal with the interaction between the solid and liquid phases, an immersed boundary method (IBM) is incorporated into SIMPLER algorithm. The fundamental numerical approaches presented in this article were individually assessed by test problems, all showing good agreements with benchmark solutions. The established sharp-interface model was then applied in simulating melting and solidification without and with fluid flow, where competitive performance in accuracy was demonstrated by the numerical results. © 2018 Elsevier Ltd

Keyword :

Competitive performance Immersed boundary methods Interface-capturing method Melting and solidification Numerical approaches Sharp interface model Solid liquid phase change VOSET

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GB/T 7714 Ling, Kong , Tao, Wen-Quan . A sharp-interface model coupling VOSET and IBM for simulations on melting and solidification [J]. | Computers and Fluids , 2019 , 178 : 113-131 .
MLA Ling, Kong et al. "A sharp-interface model coupling VOSET and IBM for simulations on melting and solidification" . | Computers and Fluids 178 (2019) : 113-131 .
APA Ling, Kong , Tao, Wen-Quan . A sharp-interface model coupling VOSET and IBM for simulations on melting and solidification . | Computers and Fluids , 2019 , 178 , 113-131 .
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Effects of magnetic field on the pool boiling heat transfer of water-based ?-Fe2O3 and ?-Fe2O3 nanofluids EI Scopus SCIE
期刊论文 | 2019 , 128 , 762-772 | International Journal of Heat and Mass Transfer
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Abstract :

Pool boiling experiments of water-based α-Fe2O3 and γ-Fe2O3 nanofluids with different concentrations (0.005–0.100 g/L) were conducted at atmospheric pressure. Two kinds of magnetic field induced by two neodymium magnets were also applied to investigate the effects of magnetic field on the pool boiling of nanofluids. It demonstrated that the magnetic field could change the local concentration of nanofluids and produce an extra pressure on the bubble boundary. The extent of the effects was not only dependent on the intensity and distribution of magnetic field, but also the magnetism and concentration of nanoparticles. For the 0.050 g/L γ-Fe2O3 nanofluid in the presence of magnetic field induced by two mutually exclusive magnets, an enhancement in boiling heat transfer coefficient up to 28% was obtained. The results of the experiments indicated the feasibility to control the pool boiling performance of magnetic nanofluids by external magnetic field. © 2018

Keyword :

Boiling heat-transfer coefficients External magnetic field Ferric oxide nanoparticle Heat Transfer enhancement Nanofluids Pool boiling Pool boiling heat transfer Water based

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GB/T 7714 Li, Shi-Yan , Ji, Wen-Tao , Zhao, Chuang-Yao et al. Effects of magnetic field on the pool boiling heat transfer of water-based ?-Fe2O3 and ?-Fe2O3 nanofluids [J]. | International Journal of Heat and Mass Transfer , 2019 , 128 : 762-772 .
MLA Li, Shi-Yan et al. "Effects of magnetic field on the pool boiling heat transfer of water-based ?-Fe2O3 and ?-Fe2O3 nanofluids" . | International Journal of Heat and Mass Transfer 128 (2019) : 762-772 .
APA Li, Shi-Yan , Ji, Wen-Tao , Zhao, Chuang-Yao , Zhang, Hu , Tao, Wen-Quan . Effects of magnetic field on the pool boiling heat transfer of water-based ?-Fe2O3 and ?-Fe2O3 nanofluids . | International Journal of Heat and Mass Transfer , 2019 , 128 , 762-772 .
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Application and numerical error analysis of multiscale method for air flow, heat and pollutant transfer through different scale urban areas EI SCIE
期刊论文 | 2019 , 149 , 349-365 | Building and Environment
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Abstract :

There is an increasing concern on the effect of the outdoor environment on the indoor air quality (IAQ) through ventilation. In urban areas, the physical phenomenon that the air pollutants pass over the neighborhood scale–street scale–indoor scale, and affect the health of the residents belongs to multiscale problems. The adopted multiscale method models the problem in nesting grid system approach by solving from top (entire domain with relative coarse grids) to down (subsequent sub-domains with finer grid). In this paper, a 3-D multiscale model with Richardson number (Ri) equal to 0.85 was firstly established to investigate the above multiscale phenomenon, then evaluated by comparing with the full-scale intensive simulation, since our previous study showed that when Ri ≤ 0.85 the standard k-ɛ turbulence model can better predict the flow and temperature fields. The numerical error analysis of the multiscale method was conducted by considering the effects of two aspects (boundary condition interpolation schemes and sub-domain partitioning) on the regularity of error production and transfer. Results show that the applied multiscale method can save 83.8% computing time. Furthermore, it can be concluded that among the three interpolation schemes for the boundary reconstruction the linear and spline interpolation methods are appropriate while the nearest method should not be applied because of its 1st-order accuracy. If insensitive interfaces are chosen as the partitioning interfaces of the lower-scale domain the computational accuracy of the multiscale method can be greatly improved. © 2018

Keyword :

Buoyancy flow Multiscale method Numerical error analysis Pollutant dispersions Wind tunnel measurements

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GB/T 7714 Cui, Peng-Yi , Zhang, Yan , Zhang, Jin-Hao et al. Application and numerical error analysis of multiscale method for air flow, heat and pollutant transfer through different scale urban areas [J]. | Building and Environment , 2019 , 149 : 349-365 .
MLA Cui, Peng-Yi et al. "Application and numerical error analysis of multiscale method for air flow, heat and pollutant transfer through different scale urban areas" . | Building and Environment 149 (2019) : 349-365 .
APA Cui, Peng-Yi , Zhang, Yan , Zhang, Jin-Hao , Huang, Yuan-Dong , Tao, Wen-Quan . Application and numerical error analysis of multiscale method for air flow, heat and pollutant transfer through different scale urban areas . | Building and Environment , 2019 , 149 , 349-365 .
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Study on nucleation position and wetting state for dropwise condensation on rough structures with different wettability using multiphase lattice Boltzmann method EI SCIE
期刊论文 | 2019 , 131 , 96-100 | International Journal of Heat and Mass Transfer
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Abstract :

Dropwise condensation on rough structures with different wettability are numerically simulated using Lattice Boltzmann method. The latent heat during condensation process together with the energy equation is taken into consideration in this paper by solving the temperature distribution equation with a source term for the phase change. Typical droplet nucleation positions and wetting states are found out at different surface wettability through numerical results. It is concluded that with the increase of strength coefficient of the fluid-solid interaction or surface hydrophobicity, the nucleation position rises from the bottom to top of the pillar, and the wetting state of droplet changes from the wetting Wenzel state to the nonwetting Cassie one. © 2018

Keyword :

Condensation process Dropwise condensation Fluid solid interaction Lattice Boltzmann method Multi-phase lattice Boltzmann method Strength coefficients Surface hydrophobicity Surface wettability

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GB/T 7714 Li, Mingjie , Huber, Christian , Tao, Wenquan et al. Study on nucleation position and wetting state for dropwise condensation on rough structures with different wettability using multiphase lattice Boltzmann method [J]. | International Journal of Heat and Mass Transfer , 2019 , 131 : 96-100 .
MLA Li, Mingjie et al. "Study on nucleation position and wetting state for dropwise condensation on rough structures with different wettability using multiphase lattice Boltzmann method" . | International Journal of Heat and Mass Transfer 131 (2019) : 96-100 .
APA Li, Mingjie , Huber, Christian , Tao, Wenquan , Wei, Jinjia . Study on nucleation position and wetting state for dropwise condensation on rough structures with different wettability using multiphase lattice Boltzmann method . | International Journal of Heat and Mass Transfer , 2019 , 131 , 96-100 .
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Numerical prediction of thermal contact resistance of 3D C/C-SiC needled composites based on measured practical topography EI SCIE
期刊论文 | 2019 , 131 , 176-188 | International Journal of Heat and Mass Transfer
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Abstract :

The 3D C/C-SiC composite is a kind of widely used material in thermal protection system or other functional parts of the hypersonic vehicles. This paper conducts numerical simulation to predict the thermal contact resistance of the 3D C/C-SiC needled composite pairs. The practical surface topography is measured by a 3D optical microscope named Bruker Contour GT-K, and the rough surfaces for simulation are reconstructed in ANSA software with the help of Python code. The measured arithmetical mean roughness (Ra) of the two specimens are 12.04 μm and 11.75 μm respectively. The prediction is divided into two steps, static analysis for revealing the contact spot distribution of the contact interfaces, and thermal analysis for the temperature distribution of the contact interfaces to calculate the thermal contact resistance. Both two steps are finished with Abaqus. The prediction results show that actual contact area only occupies a small part of nominal contact area (when pressure is 5.52 MPa, the actual contact area just accounts for 7% of the nominal contact area), and the dependency curve approximately shows linearity between the proportion of actual contact area to nominal contact area and loading pressure. Besides, thermal contact resistance decreases with an increase in loading pressure and temperature. Thermal contact resistances of the studied composite materials are in the order of 6 × 10−4–1.2 × 10−3 K·m2·W−1. © 2018 Elsevier Ltd

Keyword :

3d optical microscopes Arithmetical mean Contact interface Functional parts Loading pressures Numerical predictions Thermal contact resistance Thermal Protection System

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GB/T 7714 Ren, Xing-Jie , Dai, Yan-Jun , Gou, Jian-Jun et al. Numerical prediction of thermal contact resistance of 3D C/C-SiC needled composites based on measured practical topography [J]. | International Journal of Heat and Mass Transfer , 2019 , 131 : 176-188 .
MLA Ren, Xing-Jie et al. "Numerical prediction of thermal contact resistance of 3D C/C-SiC needled composites based on measured practical topography" . | International Journal of Heat and Mass Transfer 131 (2019) : 176-188 .
APA Ren, Xing-Jie , Dai, Yan-Jun , Gou, Jian-Jun , Tao, Wen-Quan . Numerical prediction of thermal contact resistance of 3D C/C-SiC needled composites based on measured practical topography . | International Journal of Heat and Mass Transfer , 2019 , 131 , 176-188 .
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Heat transfer correlations of refrigerant falling film evaporation on a single horizontal smooth tube EI
期刊论文 | 2019 , 96-106 | International Journal of Heat and Mass Transfer
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Falling film evaporation heat transfer of R134a and its potential substitutes R290 and R600a outside a single horizontal plain tube is experimentally investigated, and the effects of the saturation temperature, film flow rate and heat flux on heat transfer coefficient are studied. Heat transfer performance of R290 is slightly superior than that of R134a, while R600a is inferior than that of R134a. The threshold film Reynolds number is determined to separate the variation trend of HTC with film Reynolds number into full wetting and partial dryout regimes. Increase of heat flux benefits the heat transfer in both full-wetting and partial dry-out regimes. New heat transfer correlations based on the present data and data for R32 and R1234ze(E) in the authors’ group are suggested for two regimes. The correlation for full wetting regime fits 96.7% of the total 542 correlated data within ±30% while fits 73.4% of the total 289 data in references from −30% to +15%, the correlation for partial dryout regime fits 97.5% of the total 162 correlated data within ±30% while fits 76.8% of the total 95 data from references within ±30%. © 2018

Keyword :

Correlated data Falling-film evaporation Film flow rate Heat transfer correlation Heat transfer performance Horizontal smooth tubes Plain tubes Saturation temperature

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GB/T 7714 Jin, Pu-Hang , Zhang, Zhuo , Mostafa, Ibrahim et al. Heat transfer correlations of refrigerant falling film evaporation on a single horizontal smooth tube [J]. | International Journal of Heat and Mass Transfer , 2019 : 96-106 .
MLA Jin, Pu-Hang et al. "Heat transfer correlations of refrigerant falling film evaporation on a single horizontal smooth tube" . | International Journal of Heat and Mass Transfer (2019) : 96-106 .
APA Jin, Pu-Hang , Zhang, Zhuo , Mostafa, Ibrahim , Zhao, Chuang-Yao , Ji, Wen-Tao , Tao, Wen-Quan . Heat transfer correlations of refrigerant falling film evaporation on a single horizontal smooth tube . | International Journal of Heat and Mass Transfer , 2019 , 96-106 .
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Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review EI Scopus SCIE
期刊论文 | 2019 , 129 , 160-197 | International Journal of Heat and Mass Transfer
SCOPUS Cited Count: 1
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Abstract :

Over the past 30 years, the lattice Boltzmann (LB) method has been developed into a versatile and powerful numerical methodology for computational fluid dynamics and heat transfer. Owing to its kinetic nature, the LB method has the capability to incorporate the essential mesoscopic physics, and it is particularly successful in modeling transport phenomena involving complex boundaries and interfacial dynamics. Up to now, the LB method has achieved great success in modeling fluid flow and heat transfer in porous media. 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 fundamental theory of the LB method for fluid flow and heat transfer. Subsequently, 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 discussed in detail. Moreover, the applications of the LB methods in single-phase and solid-liquid phase-change heat transfer in porous media are reviewed. The LB modeling and predictions of the effective thermal conductivity of porous materials are also reviewed. Finally, further developments of the LB method in the related areas are briefly discussed. © 2018 Elsevier Ltd

Keyword :

Effective thermal conductivity Fluid flow and heat transfers Lattice Boltzmann method Modeling and predictions Numerical methodologies Representative elementary volume Single phase heat transfers Solid liquid phase change

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GB/T 7714 He, Ya-Ling , Liu, Qing , Li, Qing et al. Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review [J]. | International Journal of Heat and Mass Transfer , 2019 , 129 : 160-197 .
MLA He, Ya-Ling et al. "Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review" . | International Journal of Heat and Mass Transfer 129 (2019) : 160-197 .
APA He, Ya-Ling , Liu, Qing , Li, Qing , Tao, Wen-Quan . Lattice Boltzmann methods for single-phase and solid-liquid phase-change heat transfer in porous media: A review . | International Journal of Heat and Mass Transfer , 2019 , 129 , 160-197 .
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Condensation heat transfer of R134a, R1234ze(E) and R290 on horizontal plain and enhanced titanium tubes EI SCIE CPCI-S
会议论文 | 2018 , 93 , 259-268 | Purdue Conferences / 24th International Compressor Engineering Conference / 17th International Refrigeration and Air Conditioni
WoS CC Cited Count: 1
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Abstract :

An experimental investigation on the condensation of R134a, R1234ze(E) and R290 outside plain and enhanced titanium tubes was conducted. The saturation temperature in the experiments was 35 degrees C to 40 degrees C, and heat flux was in the range of 8-80 kW/m(2). Effects of heat flux, refrigerant and saturation temperature on heat transfer were investigated. The heat transfer enhancement ratio of overall heat transfer coefficient decreased with increasing heat flux. It was found that the condensing heat transfer coefficient of R134a, compared with R1234ze(E) and R290, was the largest for plain and enhanced tubes. Saturation temperature had minor effect on condensing heat transfer coefficient for R134a, R1234ze(E) and R290 for plain tube. The effect of saturate temperature on the condensing heat transfer of R134a and R1234ze(E) was even negligible for enhanced tube. While, the condensing heat transfer coefficient of R290 for enhanced tube was increasing with increment of saturation temperature. Experimental condensing heat transfer coefficient were also compared with five predicting models for low-fin tube. It showed that the model of Briggs-Rose gave a better prediction result for R134a and R1234ze(E), while the model underestimated the experimental result for R290. (C) 2018 Elsevier Ltd and IIR. All rights reserved.

Keyword :

Condensation Heat transfer Refrigerant Tube

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GB/T 7714 Ji, Wen-Tao , Chong, Guo-Hun , Zhao, Chuang-Yao et al. Condensation heat transfer of R134a, R1234ze(E) and R290 on horizontal plain and enhanced titanium tubes [C] . 2018 : 259-268 .
MLA Ji, Wen-Tao et al. "Condensation heat transfer of R134a, R1234ze(E) and R290 on horizontal plain and enhanced titanium tubes" . (2018) : 259-268 .
APA Ji, Wen-Tao , Chong, Guo-Hun , Zhao, Chuang-Yao , Zhang, Hu , Tao, Wen-Quan . Condensation heat transfer of R134a, R1234ze(E) and R290 on horizontal plain and enhanced titanium tubes . (2018) : 259-268 .
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