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| 1 | Discrete particle simulation of mixed sand transport显示文摘An Eulerian/Lagrangian numerical simulation is performed on mixed sand transport. Volume averaged Navier-Stokes equations are solved to calculate gas motion, and particle motion is calculated using Newton's equation, involving a hard sphere model to describe particle-to-particle and particle-to-wall collisions. The influence of wall characteristics, size distribution of sand particles and boundary layer depth on vertical distribution of sand mass flux and particle mean horizontal velocity is analyzed, suggesting that all these three factors affect sand transport at different levels. In all cases, for small size groups, sand mass flux first increases with height and then decreases while for large size groups, it decreases exponentially with height and for middle size groups the behavior is in-between. The mean horizontal velocity for all size groups well fits experimental data, that is, increasing logarithmically with height in the middle height region. Wall characteristics greatly affects particle to wall collision and makes the flat bed similar to a Gobi surface and the rough bed similar to a sandy surface. Particle size distribution largely affects the sand mass flux and the highest heights they can reach especially for larger particles. | Fengjiun Xiao Lieiin Guo Debiao Li Yueshe Wang | 2012 | Particuology2012，10，2： | 3 |
| 2 | Numerical simulation of predicting and reducing solid particle erosion of solid-liquid two-phase flow in a choke显示文摘Chokes are one of the most important components of downhole flow-control equipment.The particle erosion mathematical model,which considers particle-particle interaction,was established and used to simulate solid particle movement as well as particle erosion characteristics of the solid-liquid two-phase flow in a choke.The corresponding erosion reduction approach by setting ribs on the inner wall of the choke was advanced.This mathematical model includes three parts:the flow field simulation of the continuous carrier fluid by an Eulerian approach,the particle interaction simulation using the discrete particle hard sphere model by a Lagrangian approach and calculation of erosion rate using semi-empirical correlations.The results show that particles accumulated in a narrow region from inlet to outlet of the choke and the dominating factor affecting particle motion is the fluid drag force.As a result,the optimization of rib geometrical parameters indicates that good anti-erosion performance can be achieved by four ribs,each of them with a height(H) of 3 mm and a width(B) of 5 mm equaling the interval between ribs(L). | Li Guomei Wang Yueshe He Renyang Cao Xuewen Lin Changzhi Meng Tao | 2009 | Petroleum Science2009，6，1： | 3 |
| 3 | Sand particle lift-off velocity measurements and numerical simulation of mass flux distributions in a wind tunnel显示文摘Lift-off velocity of saltating sand particles in wind-blown sand located at 1.0 mm above the sand bed surface was measured using a phase Doppler particle analyzer in a wind tunnel. The results show that the probability distribution of lift-off velocity can be expressed as a lognormal function, while that of lift-off angle follows an exponential function. The probability distribution of lift-off angle conditioned for each lift-off velocity also follows an exponential function, with a slope that becomes steeper with increasing lift-off velocity. This implies that the probability distribution of lift-off velocity is strongly dependent on the lift-off angle. However, these lift-off parameters are generally treated as an independent joint probability distribution in the literature. Numerical simulations were carried out to investigate the effects of conditional versus independent joint probability distributions on the vertical sand mass flux distribution. The simulation results derived from the conditional joint probability distribution agree much better with experimental data than those from the independent ones. Thus, it is better to describe the lift-off velocity of saltating sand particles using the conditional joint probability distribution. These results improve our understanding of saltation processes in wind-blown sand. | XIAO Fengjun DONG Zhibao GUO Liejin WANG Yueshe LI Debiao | 2017 | Journal of Arid Land2017，9，3： | 3 |
| 4 | Numerical Simulation of the Heat Flux Distribution in a Solar Cavity Receiver 显示文摘 | WANG Yueshe DONG Xunwei WEI Jinjia | 2010 | Frontiers of Energy and Power Engineering in China2010，4，4： | 1 |
| 5 | Cointegration Tests of Energy Consumption,Income,and Employment显示文摘 | YuESH JinJC | 1992 | Resources of Energy1992，14，3： | 1 |
| 6 | Multi-physics analysis of the galvanic corrosion of Mg-steel couple under the influence of time-dependent anisotropic deposition film显示文摘The anisotropic deposit film formed during the galvanic corrosion can impede the mass transfer of the involved species,thereby affecting the electro-chemical behavior and the evolution of galvanic corrosion.The limitations of experimental studies in the spatial-temporal scales restrict a deeper understanding of the corrosion mechanism,which can be complemented by numerical simulation.A multi-physics coupled model is proposed in this work to systematically investigate the temporal and spatial evolution of galvanic corrosion of the Mg-steel couple with the growing anisotropic deposition layer.By utilizing the multi-physics field coupled technique,various coupled physical-chemical processes underlying the corrosion behavior are built into the model,including chemical reactions,ionic mass transfer in the bulk solution and the deposition layer,interfacial reaction,deposition of corrosion products as well as the morphological transitions caused by metal dissolution and deposition.In particular,the anisotropic deposit film is considered to be a porous layer with a porosity varying in time and space as the corrosion evolves.The predicted corrosion morphology by this model is better than the previous models.The coupled relationship between the electrochemical behavior(e.g.,electrode reaction kinetics,current density,surface potential)and the physical processes(e.g.,ionic transport,geometric evolution of metal surface and film interface)is revealed.The results indicate that a porous deposition layer with a denser inner layer and a loose outer layer is generated,leading to more significant inhibition of mass transfer in the inner layer than the outer layer.The anisotropism of the deposition layer results in a non-uniform conductivity distribution and a discontinuous current density distribution in the electrolyte.The current density on the electrode surface is inhibited by the deposition layer and the variation in the cathode/anode area ratio during the corrosion process.The competition between the transport process and the electrochemical reaction determines the spatial-temporal evolution of the ion concentration. | Kai Wang Chenpei Li Yanhui Li Jinling Lu Yueshe Wang Xingqi Luo | 2021 | Journal of Magnesium and Alloys2021，9，3： | 1 |
| 7 | Numerical investigation on characteristics of interfacial wave of liquid film in gas-liquid two-phase flow using OpenFOAM显示文摘Liquid film cooling as an advanced cooling technology is widely used in space vehicles.Stable operation of liquid film along the rocket combustion inner wall is crucial for thermal protection of rocket engines.The stability of liquid film is mainly determined by the characteristics of interfacial wave,which is rarely investigated right now.How to improve the stability of thin film has become a hot spot.In view of this,an advanced model based on the conventional Volume of Fluid(VOF)model is adopted to investigate the characteristics of interfacial wave in gas-liquid flow by using OpenFOAM,and the mechanism of formation and development of wave is revealed intuitively through numerical study.The effects from gas velocity,surface tension and dynamic viscosity of liquid(three factors)on the wave are studied respectively.It can be found that the gas velocity is critical to the formation and development of wave,and four modes of droplets generation are illustrated in this paper.Besides,a gas vortex near the gas-liquid interface can induce formation of wave easily,so changing the gas vortex state can regulate formation and development of wave.What’s more,the change rules of three factors influencing on the interfacial wave are obtained,and the surface tension has a negative effect on the formation and development of wave only when the surface tension coefficient is above the critical value,whereas the dynamic viscosity has a positive effect in this process.Lastly,the maximum height and maximum slope angle of wave will level off as the gas velocity increases.Meanwhile,the maximum slope angle of wave is usually no more than 38°,no matter what happens to the three factors. | Xiaoqi MA Yueshe WANG Jiaming TIAN | 2024 | Chinese Journal of Aeronautics2024，37，2： | 0 |
| 8 | Experimental Study on Convective Boiling Heat Transfer in Vertical Narrow-Gap Annular Tube显示文摘Experiments are conducted to investigate the characteristics of single-phase forced-flow convection and boiling heat transfer of R113 flowing through annular tube with gap of l, 1.5 and 2.5 mm. and also the visualization test are carried out to get two-phase flow regime. The data show that the Nusselt numbers for the narrow-gap are higher than those predicted by traditional large channel correlation and boiling heat transfer is enhanced. Based on the data obtained in this investigation, correlations for single-phase, forced convection and flow boiling in annular tube of different gap size has been developed. | Li Bin He Anding Wang Yueshe Zhou Fangde The National Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China | 2001 | Journal of Thermal Science2001，10，2： | 0 |
| 9 | Insight into the interaction between water and surfactant aerosol particles based on molecular dynamics simulations显示文摘The ubiquitous surfactant significantly influences the hygroscopic growth of atmospheric aerosol par-ticles.However,knowledge on the morphology of surfactant particles after the adsorption of water is insufficient.In this study,the interaction between water and particles composed of surface active malonic acid(MA)or adipic acid(AA)are simulated based on the molecular dynamics method.The key point is the combined effect of temperature and water content on the structural properties of particles and the surface propensity of surfactants at the equilibrium state.Results show that demixed structure 1 with the adsorption of water clusters on acid grain,mixed structure and demixed structure 2 with acids coating on water droplet can be observed.With temperature increasing from 160 K to 330 K the surface propensity of MA and AA increases first and then weakens.Near the standard atmospheric temperature(280-330 K),the surface propensity of MA and AA increases with increasing water content and alkyl group,and its sensitivity to temperature and water content varies regularly.Moreover,all surfactants at the particle surface orient their hydrophobic groups toward the gas.These findings improve our insight into the surfactant partitioning and further assist in more accurate prediction of the particle hygroscopic growth. | Chao Zhang Zhichao Zhang Longxiang Bu Yang Yang Wei Xiong Yueshe Wang | 2023 | Particuology2023，，6： | 0 |
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