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High-order targeted essentially non-oscillatory scheme for two-fluid plasma model 被引量:1
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作者 Yuhang HOU Ke JIN +1 位作者 Yongliang FENG Xiaojing ZHENG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第6期941-960,共20页
The weakly ionized plasma flows in aerospace are commonly simulated by the single-fluid model,which cannot describe certain nonequilibrium phenomena by finite collisions of particles,decreasing the fidelity of the sol... The weakly ionized plasma flows in aerospace are commonly simulated by the single-fluid model,which cannot describe certain nonequilibrium phenomena by finite collisions of particles,decreasing the fidelity of the solution.Based on an alternative formulation of the targeted essentially non-oscillatory(TENO)scheme,a novel high-order numerical scheme is proposed to simulate the two-fluid plasmas problems.The numerical flux is constructed by the TENO interpolation of the solution and its derivatives,instead of being reconstructed from the physical flux.The present scheme is used to solve the two sets of Euler equations coupled with Maxwell's equations.The numerical methods are verified by several classical plasma problems.The results show that compared with the original TENO scheme,the present scheme can suppress the non-physical oscillations and reduce the numerical dissipation. 展开更多
关键词 PLASMA high-order scheme targeted essentially non-oscillatory(TENO)scheme two-fluid model
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Temperature and current sensitivity extraction of optical superconducting transition-edge sensors based on a two-fluid model 被引量:2
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作者 耿悦 李佩展 +5 位作者 钟家强 张文 王争 缪巍 任远 史生才 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第9期594-598,共5页
Optical superconducting transition-edge sensor(TES)has been widely used in quantum information,biological imaging,and fluorescence microscopy owing to its high quantum efficiency,low dark count,and photon number resol... Optical superconducting transition-edge sensor(TES)has been widely used in quantum information,biological imaging,and fluorescence microscopy owing to its high quantum efficiency,low dark count,and photon number resolving capability.The temperature sensitivity(α_(I))and current sensitivity(β_(I))are important parameters for optical TESs,which are generally extracted from the complex impedance.Here we present a method to extractα_(I)andβ_(I)based on a two-fluid model and compare the calculated current-voltage curves,pulse response,and theoretical energy resolution with the measured ones.This method shows qualitative agreement that is suitable for further optimization of optical TESs. 展开更多
关键词 transition-edge sensor single-photon detector two-fluid model
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Anisotropic Plane Symmetric Two-Fluid Cosmological Model with Time-Varying G and A
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作者 Verma M. K. Chandel S. Ram Shri 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第12期1-4,共4页
We investigate a two-fluid anisotropic plane symmetric cosmological model with variable gravitational constant G(t) and cosmological term A(t). In the two-fluid model, one fluid is chosen to be that of the radiati... We investigate a two-fluid anisotropic plane symmetric cosmological model with variable gravitational constant G(t) and cosmological term A(t). In the two-fluid model, one fluid is chosen to be that of the radiation field modeling the cosmic microwave background and the other one a perfect fluid modeling the material content of the universe. Exact solutions of the field equations are obtained by using a special form for the average scale factor which corresponds to a specific time-varying deceleration parameter. The model obtained presents a cosmological scenario which describes an early acceleration and late-time deceleration. The gravitation constant increases with the cosmic time whereas the cosmological term decreases and asymptotically tends to zero. The physical and kinematical behaviors of the associated fluid parameters are discussed. 展开更多
关键词 Anisotropic Plane Symmetric two-fluid Cosmological model with Time-Varying G and A FRW
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REVIEW ON MATHEMATICAL ANALYSIS OF SOME TWO-PHASE FLOW MODELS 被引量:3
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作者 温焕尧 姚磊 朱长江 《Acta Mathematica Scientia》 SCIE CSCD 2018年第5期1617-1636,共20页
The two-phase flow models are commonly used in industrial applications, such as nuclear, power, chemical-process, oil-and-gas, cryogenics, bio-medical, micro-technology and so on. This is a survey paper on the study o... The two-phase flow models are commonly used in industrial applications, such as nuclear, power, chemical-process, oil-and-gas, cryogenics, bio-medical, micro-technology and so on. This is a survey paper on the study of compressible nonconservative two-fluid model, drift-flux model and viscous liquid-gas two-phase flow model. We give the research developments of these three two-phase flow models, respectively. In the last part, we give some open problems about the above models. 展开更多
关键词 compressible nonconservative two-fluid model drift-flux model viscous liquid-gas two-phase flow model WELL-POSEDNESS
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Experimental Determination and Modeling of Bubble Size Distributions in Bubble Columns 被引量:1
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作者 H.F.Svendsen 罗和安 +1 位作者 K.W.Hjarbo H.A.Jakobsen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1998年第1期33-45,共13页
Using a five point conductivity technique local values of bubble size,bubble velocity and gas fractionhave been experimentally determined in a 288 mmID and 4.3 m high bubble column as a function of axial andradial pos... Using a five point conductivity technique local values of bubble size,bubble velocity and gas fractionhave been experimentally determined in a 288 mmID and 4.3 m high bubble column as a function of axial andradial position for the air/water and CO<sub>2</sub>/N<sub>2</sub>/aqueous MDEA systems.The experimental results are comparedwith predictions from a fundamental two-fluid model.The implementation of a non-steady lateral drag term inthe two-fluid model has been shown.In addition to improving the physical realism of the model,it is found togive slight improvements in the predictions of the distributions of local bubble size.Predictions of bubble size arefound in reasonable agreement with experimental values in the heterogeous flow regime,whereas they are stil1found to be unreliable at low gas velocities.Local void predictions are found in reasonable agreement with experi-mental values,but deviations occur in the homogeneous flow regime towards the wall.This is attributed to defi-ciencies in the simplified bubble size 展开更多
关键词 BUBBLE COLUMN BUBBLE size distribution VOLUMETRIC VELOCITY gas FRACTION two-fluid model
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A THREE-FLUID MODEL OF THE SAND-DRIVEN FLOW
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作者 刘大有 董飞 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1996年第7期647-657,共11页
The sand-driven flow is studied from the continuum viewpoint in this paper. The crux of this work is how to model the stresses of the particle phase properly. By analysing the two-fluid model which usually, works in s... The sand-driven flow is studied from the continuum viewpoint in this paper. The crux of this work is how to model the stresses of the particle phase properly. By analysing the two-fluid model which usually, works in solving gas-particle two-phase .flow,. we find that this model has many. deficiencies for studying the sand-driven flow,even for the simplest case- the steady, two-dimensional fully-developed flow.Considering this, we have proposed the three-fluid model in which the upward particles and the downward-particles ore regarded as two kinds of fluids respectively.It is shown that the three-fluid model is better than the two-fluid model in reflecting the internal structure of the flow, region and the influence of the boundary situations on the flow. and it is advantageous to find an approximate solution in that the main components of the particle-phase stresses can be explicitly expressed by those variables in the three-fluid model.In the end, the governing equations as well as the boundary. conditions for the three-fluid model are provided with a discussion. 展开更多
关键词 Sand-driven flow two-phase flow two-fluid model three-fluid model
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An improved semi-empirical friction model for gas-liquid two-phase flow in horizontal and near horizontal pipes
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作者 M.Gharehasanlou M.Emamzadeh M.Ameri 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2020年第4期213-223,共11页
Pressure drop and liquid hold-up are two very important fluid flow parameters in design and control of multiphase flow pipelines.Friction factors play an important role in the accurate calculation of pressure drop.Var... Pressure drop and liquid hold-up are two very important fluid flow parameters in design and control of multiphase flow pipelines.Friction factors play an important role in the accurate calculation of pressure drop.Various empirical and semi-empirical closure relations exist in the literature to calculate the liquid-wall,gas-wall and interfacial friction in two-phase pipe flow.However most of them are empirical correlations found under special experimental conditions.In this paper by modification of a friction model available in the literature,an improved semiempirical model is proposed.The proposed model is incorporated in the two-fluid correlations under equilibrium conditions and solved.Pressure gradient and velocity profiles are validated against experimental data.Using the improved model,the pressure gradient deviation from experiments diminishes by about 3%;the no-slip condition at the interface is satisfied and the velocity profile is predicted in better agreement with the experimental data. 展开更多
关键词 Friction factor Numerical simulation Semi-empirical friction model Two-phase flow two-fluid model
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Prediction of pressure gradient and hold-up in horizontal liquid-liquid pipe flow
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作者 Syed Amjad Ahmed Bibin John 《Petroleum Science》 SCIE EI CAS CSCD 2023年第6期3766-3782,共17页
This paper aims to propose correlations to predict pressure gradient,friction factor and fluid phase hold-up in liquid-liquid horizontal pipe flow.To develop the correlations,experiments are conducted using high visco... This paper aims to propose correlations to predict pressure gradient,friction factor and fluid phase hold-up in liquid-liquid horizontal pipe flow.To develop the correlations,experiments are conducted using high viscous oils(202 and 630 mPa⋅s)in a steel pipe of length 11.25 m and length-to-diameter ratio of 708.In addition,the experimental data from the literature comprising wide range of flow and fluid properties is analyzed.For the analysis,the liquid-liquid pipe flow data is categorized into two as:stratified and dispersed.The existing friction factor correlations are modified to incorporate the effects of viscosity of the oil phase,interfacial curvature(contact/wetting angle-in lieu of material of the pipe)and fluid phase fraction.In the two-fluid model of stratified flow,the wall stress and interfacial stress correlations are substituted with superficial velocities of fluids and superficial Reynolds numbers of fluid phases replacing fluid phase velocities and fluid Reynolds numbers.Similarly,for dispersed flow,an effective Reynolds number is described as the sum of superficial Reynolds number of oil and water phases.Substituting the generally employed mean or mixture Reynolds number with the effective Reynolds number into the existing single-phase turbulent flow friction factor correlation,an effective friction factor for oil-water flow is proposed.Employing the proposed correlations,the pressure gradient across the oil-water flow and hold-up volume fraction are predicted with significant reduction in error compared with that of conventionally employed correlations.The average error and standard deviation values of−7.06%,20.72%and 0.31%,18.79%are found for stratified flow and dispersed flow respectively. 展开更多
关键词 oil-water flow two-fluid model pressure gradient stratified flow dispersed flow
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Validation of an improved two-fluid model with particle rotation for gas-solid fluidized bed
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作者 Lian Wang Xihua Chu 《Particuology》 SCIE EI CAS CSCD 2023年第10期149-161,共13页
Gas-solid fluidized beds are widely applied in chemical and process engineering.It is of significance to establish a reasonable and effective mathematical model to explore the hydrodynamics of gas-particle system for ... Gas-solid fluidized beds are widely applied in chemical and process engineering.It is of significance to establish a reasonable and effective mathematical model to explore the hydrodynamics of gas-particle system for industrial applications.As a less computationally demanding alternative to the discrete descriptions,two-fluid model considering kinetic theory of granular flow is often adopted to describe the fluidized behaviors of particles,but it cannot characterize the rotation of particles and its influence on the fluidized behaviors.In this study,to address the rotation effect of the fluidized particles,a two-fluid model combining the classical fluid and micropolar fluid is established,namely CMTFM.In the CMTFM,classical fluid is used to describe the motion of gas phase,while micropolar fluid is adopted to describe the motion of particle phase,and the rotation of particles and its influence on the hydrodynamics of the gas-particle system are characterized by the degree of freedom of microrotation and the improved drag force based on micropolar viscosities.In the calculation of the gas-solid bubbling fluidized bed,we investigated the influence of the microstructure parameters,particle-particle collision restitution coefficient and inlet velocity,and the results are compared to those from TFM model and experiments.Through the analysis,it manifests that pressure drop and expansion height of the fluidized bed under the consideration of the microrotation effect are closer to the experiments,which demonstrates the feasibility and advantage of the classical-micropolar two-fluid model. 展开更多
关键词 Gas-solid fluidized bed two-fluid model Micropolar fluid Microstructure parameter Fluidized behaviors
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陶瓷干法造粒机叶片安装高度对造粒效果的影响 被引量:1
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作者 吴南星 鲍星 +1 位作者 廖达海 肖志锋 《陶瓷学报》 CAS 北大核心 2014年第4期415-418,共4页
为了分析陶瓷干法造粒机叶片安装高度对造粒效果的影响,该文基于欧拉—欧拉模型建立数学模型,利用有限体积法求解,模拟研究了造粒过程中颗粒的体积分布情况。结果表明:当叶片与造粒室底端最小距离为15 mm时,颗粒的分散性最好,造粒效果... 为了分析陶瓷干法造粒机叶片安装高度对造粒效果的影响,该文基于欧拉—欧拉模型建立数学模型,利用有限体积法求解,模拟研究了造粒过程中颗粒的体积分布情况。结果表明:当叶片与造粒室底端最小距离为15 mm时,颗粒的分散性最好,造粒效果最佳。 展开更多
关键词 叶片 欧拉-欧拉模型 数值模拟 分散性
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基于FLUENT的干法造粒机搅拌器的结构优化
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作者 吴南星 占甜甜 黄佳雯 《中国陶瓷》 CAS CSCD 北大核心 2015年第7期32-36,共5页
为了研究陶瓷干法造粒机搅拌器结构对造粒效果的影响,利用fluent基于欧拉双流体模型建立搅拌器的数学模型,用有限体积法求解,模拟造粒60 s时的颗粒的体积分布。结果表明:当搅拌器叶片分布在铰刀下方时颗粒分散性最好,造粒效果更好。
关键词 搅拌器 欧拉双流体模型 数值模拟 颗粒分散性
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Two-fluid modeling of Geldart A particles in gas-fluidized beds 被引量:16
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作者 M.A. van der Hoef J.A.M. Kuipers 《Particuology》 SCIE EI CAS CSCD 2008年第6期540-548,共9页
We have investigated the effect of cohesion and drag models on the bed hydrodynamics of Geldart A particles based on the two-fluid (TF) model. For a high gas velocity U0 = 0.03 m/s, we found a transition from the ho... We have investigated the effect of cohesion and drag models on the bed hydrodynamics of Geldart A particles based on the two-fluid (TF) model. For a high gas velocity U0 = 0.03 m/s, we found a transition from the homogeneous fluidization to bubbling fluidization with an increase of the coefficient C1, which is used to account for the contribution of cohesion to the excess compressibility. Thus cohesion can play a role in the bed expansion of Geldart A particles. Apart from cohesion, we have also investigated the influence of the drag models. When using the Wen and Yu drag correlation with an exponent n = 4.65, we find an under-prediction of the bed expansion at low gas velocities (U0 = 0.009 m/s). When using a larger exponent (n = 9.6), as reported in experimental studies of gas-fluidization, a much better agreement with the experimental bed expansion is obtained. These findings suggest that at low gas velocity, a scale-down of the commonly used drag model is required. On the other hand, a scale-up of the commonly used drag model is necessary at high gas velocity (U0 = 0.2 and 0.06 m/s). We therefore conclude that scaling the drag force represent only an ad hoc way of repairing the deficiencies of the TF model, and that a far more detailed study is required into the origin of the failure of the TF model for simulating fluidized beds of fine powders. 展开更多
关键词 Gas-fluidized bed Geldart A particles two-fluid model Cohesive force Drag correlation
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Two-fluid modeling of Geldart A particles in gas-solid micro-fluidized beds 被引量:9
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作者 Xiaoxing Liu Chuanqiang Zhu +3 位作者 Shujun Geng Meiqin Yao Jinhui Zhan Guangwen Xu 《Particuology》 SCIE EI CAS CSCD 2015年第4期118-127,共10页
The fiuidization behavior of Geldart A particles in a gas-solid micro-fluidized bed was investigated by Eulerian-Eulerian numerical simulation. The commonly used Gidaspow drag model was tested first. The simulation sh... The fiuidization behavior of Geldart A particles in a gas-solid micro-fluidized bed was investigated by Eulerian-Eulerian numerical simulation. The commonly used Gidaspow drag model was tested first. The simulation showed that the predicted minimum bubbling velocities were significantly lower than the experimental data even when an extremely fine grid size (of approximately one particle diameter) was used. The modified Gibilaro drag model was therefore tested next. The predicted minimum bubbling velocity and bed voidage were in reasonable agreement with the experimental data available in literature. The experimentally observed regime transition phenomena from bubbling to slugging were also reproduced successfully in the simulations. Parametric studies indicated that the solid-wall boundary conditions had a significant impact on the predicted gas and solid flow behavior. 展开更多
关键词 Micro-fluidized bed Geldart A particle two-fluid model Boundary condition Drag model
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Influence of core box vents distribution on flow dynamics of core shooting process based on experiment and numerical simulation 被引量:4
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作者 Chang-jiang Ni Gao-chun Lu +4 位作者 Qing-dong Zhang Tao Jing Jun-jiao Wu Lin-long Yang Qin-fang Wu 《China Foundry》 SCIE 2016年第1期22-29,共8页
Core shooting process plays a decisive role in the quality of sand cores, and core box vents distribution is one of the most important factor determining the effectiveness of core shooting process. In this paper, the ... Core shooting process plays a decisive role in the quality of sand cores, and core box vents distribution is one of the most important factor determining the effectiveness of core shooting process. In this paper, the influence of core box vents distribution on the flow dynamics of core shooting process was investigated based on in situ experimental observations with transparent core box, high-speed camera and pressure measuring system. Attention was focused on the variation of both the flow behavior of sand and pressure curves due to different vents distribution. Taking both kinetic and frictional stress into account, a kinetic-frictional constitutive model was established to describe the internal momentum transfer in the solid phase. Two-fluid model(TFM) simulation was then performed and good agreement was achieved between the experimental and simulated results on both the flow behavior of sand and the pressure curves. It was found that vents distribution has direct effect on the pressure difference of different locations in the core box, which determines the buoyancy force exerting on the sand particles and significantly influences the filling process of core sand. 展开更多
关键词 vents distribution flow dynamics pressure variation core shooting process kinetic-frictional model two-fluid model
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Numerical simulations of gas-particle flow behavior created by low-level rotary-winged aircraft flight over particle bed 被引量:2
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作者 Xiaoxue JIANG Yingqiao XU +2 位作者 Chuang WANG Linzhi MENG Huilin LU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2019年第3期397-406,共10页
The aerodynamics of gas-particle suspensions is simulated as an Euler-Euler two-fluid model in a revolving rotor over a particle bed. The interactions of collisions between the blade and particles and particle-particl... The aerodynamics of gas-particle suspensions is simulated as an Euler-Euler two-fluid model in a revolving rotor over a particle bed. The interactions of collisions between the blade and particles and particle-particle interactions are modeled using the kinetic theory of granular flow(KTGF). The gas turbulence induced by the rotation of the rotor is modeled using the kg-εg model. The flow field of a revolving rotor is simulated using the multiple reference frame(MRF) method. The distributions of velocities, volume fractions, and gas pressure are predicted while the aircraft hovers at different altitudes.The gas pressure decreases from the hub to the tip of the blade, and it is higher at the pressure side than that at the suction side of the rotor. The turbulent kinetic energy of the gas increases toward the blade tip. The volume fraction of particles decreases as the hovering altitude increases. The simulated pressure coefficient is compared with that in experimental measurements. 展开更多
关键词 HELICOPTER rotor Euler-Euler two-fluid model KINETIC theory of GRANULAR flow(KTGF) pressure coefficient
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Particle mixing rates using the two-fluid model 被引量:1
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作者 M. Banaei N.G. Deen +1 位作者 M. van Sint Annaland J.A.M. Kuipers 《Particuology》 SCIE EI CAS CSCD 2018年第1期13-26,共14页
In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was... In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was carefully verified. The solids phase continuity equation was satisfied using our method, and the sensitivity of the computational results to the time step, computational cell size, and discretization scheme was investigated to determine the optimal simulation settings. Using these simulation settings, the degree of solids mixing was observed to rapidly (exponentially) increase with increasing operating pressure and linearly decrease with increasing bed diameter. Our novel methodology can be applied to analyze mixing processes in large lab-scale beds as an alternative to existing time-consuming simulation techniques such as computational fluid dynamics combined with the discrete element model. 展开更多
关键词 Gas-solid fluidized bed SIMULATION two-fluid model Solids mixing PRESSURE Scale up
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Study of Argon/Molten Steel Two-Phase Flow in Refining of High Clean Steel Using Two-Fluid Model 被引量:1
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作者 TSUKIHASHI Fumitaka 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2011年第S2期176-181,共6页
RH vacuum degasser is a very important secondary refining device in the production of high quality steels. The flow field of molten steel in RH system plays a significant role in determining productivity of the equipm... RH vacuum degasser is a very important secondary refining device in the production of high quality steels. The flow field of molten steel in RH system plays a significant role in determining productivity of the equipment. The homogeneous model and VOF method were often used to predict the flow field in RH system, but these kinds of models simplified the interaction between gas bubbles and molten steel. In the present work, a numerical model of a whole RH system, including vacuum degasser, immersed legs and ladle,was built based on gas-liquid two-fluid model, and it could be used to analyze the interaction between argon bubbles and molten steel, to understand the effect of the bubble size to the flow field. 展开更多
关键词 RH vacuum degasser gas-liquid two-phase flow two-fluid model interaction
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Simulation on hydrodynamics of non-spherical particulate system using a drag coefficient correlation based on artificial neural network 被引量:1
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作者 Sheng-Nan Yan Tian-Yu Wang +2 位作者 Tian-Qi Tang An-Xing Ren Yu-Rong He 《Petroleum Science》 SCIE CAS CSCD 2020年第2期537-555,共19页
Fluidization of non-spherical particles is very common in petroleum engineering.Understanding the complex phenomenon of non-spherical particle flow is of great significance.In this paper,coupled with two-fluid model,t... Fluidization of non-spherical particles is very common in petroleum engineering.Understanding the complex phenomenon of non-spherical particle flow is of great significance.In this paper,coupled with two-fluid model,the drag coefficient correlation based on artificial neural network was applied in the simulations of a bubbling fluidized bed filled with non-spherical particles.The simulation results were compared with the experimental data from the literature.Good agreement between the experimental data and the simulation results reveals that the modified drag model can accurately capture the interaction between the gas phase and solid phase.Then,several cases of different particles,including tetrahedron,cube,and sphere,together with the nylon beads used in the model validation,were employed in the simulations to study the effect of particle shape on the flow behaviors in the bubbling fluidized bed.Particle shape affects the hydrodynamics of non-spherical particles mainly on microscale.This work can be a basis and reference for the utilization of artificial neural network in the investigation of drag coefficient correlation in the dense gas-solid two-phase flow.Moreover,the proposed drag coefficient correlation provides one more option when investigating the hydrodynamics of non-spherical particles in the gas-solid fluidized bed. 展开更多
关键词 Fluidized bed two-fluid model Drag coefficient correlation Non-spherical particle Artificial neural network
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A TWO-FLUID MODEL OF TURBULENCE AND ITS MODIFICATIONS 被引量:1
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作者 范维澄 《Science China Mathematics》 SCIE 1988年第1期79-86,共8页
The two-fluid model of turbulence proposed in 1982 describes various states of fluids at the same position of space. The present paper gives a brief introduction to the basic principle of this model and lays emphasis ... The two-fluid model of turbulence proposed in 1982 describes various states of fluids at the same position of space. The present paper gives a brief introduction to the basic principle of this model and lays emphasis on the new idea about the interaction betweeu the two fluids and corresponding mathematic models, including the transformation of the turbulent fluid into the non-turbuhnt fluid by decay and dissipation of turbulence in a turbulent free jet, the existence of heat transfer between combustion products and unburnt combustible mixture in a zone of premixed combustion, and the intensification of chemical reaction by the rising temperature of combustible mixture. Predictions of the intermittency of turbulence in a turbulent free jet and of a turbulent premixed combustion are likely to be improved with this model. 展开更多
关键词 A two-fluid model OF TURBULENCE AND ITS MODIFICATIONS
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The Two-fluid Model of Turbulent Buoyant Recirculating Two-Phase Flow
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作者 沈永明 赵文谦 倪浩清 《Science China Mathematics》 SCIE 1993年第9期1129-1139,共11页
Taking refined forecasting model of oil pollution as basic target,this pa-per widely deals with the theory and method of refined simulation of turbulent two-phaseflow.The two-fluid model of turbulent buoyant recircula... Taking refined forecasting model of oil pollution as basic target,this pa-per widely deals with the theory and method of refined simulation of turbulent two-phaseflow.The two-fluid model of turbulent buoyant recirculating two-phase flow and the cor-responding method of numerical computation are developed in this paper.The motion ofeach phase is described by a unified multi-fluid model in an Eulerian coordinate system.The laws of turbulent transportation for each phase,and the restriction of each other be-tween the two phases are completely simulated.The complex two-phase turbulence withbuoyancy and recirculating flow is selected to examine numerically.Comparison of the re-sults of numerical simulation with the experimental data is conducted.Then the forecastsfor oil-water two-phase turbulence are carried out.It has been shown that the results ofnumerical simulation are satisfactory. 展开更多
关键词 TWO-PHASE TURBULENCE two-fluid model predietion of oil POLLUTION
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