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Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 53-59 doi: 10.1007/s11465-009-0006-0

Abstract: This paper presents an extended two-fluid model based on the Navier-Stokes equations and the standardturbulence model, to simulate the three-dimensional air-water bubbly flow in turbo machinery.The discrete equations are solved using a developed two-phase semi-implicit method for pressure-linkedSimulation is then carried out for the pure liquid flow and air-water two-phase flow with the inlet gasComparison with experimental results shows the reliability and commonality of the numerical model.

Keywords： two-fluid model     multiphase rotodynamic pump     SIMPLEC algorithm     numerical simulation    

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MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layerfluid system

Hulin HUANG, Xiaoming ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 155-160 doi: 10.1007/s11708-009-0063-4

Abstract: thermocapillary convection in a rectangular cavity with differentially heated side walls filled with twoIn this two-layer fluid system, the upper layer fluid is the electrically non-conducting encapsulantThe interface between the two fluids is assumed to be flat and non-deformable.

Keywords： magnetohydrodynamic     magnetic fields     thermocapillary convection     critical temperature difference     oscillatory convection     two-layerfluid system    

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Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics

Chong PANG, Wei TAN, Endian SHA, Yuanqing TAO, Liyan LIU

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 329-338 doi: 10.1007/s11705-012-1205-5

Abstract: The design of two-stage pusher centrifuges have developed rapidly, but a good understanding of the theoryTo better understand centrifugal filter processes, the computational fluid dynamics (CFD) software programFLUENT has been used to model the three-dimensional geometry and to simulate multiphase flows basedThese results show that this simulation method could be an effective tool to optimize the design of the two-stage

Keywords： two-stage pusher centrifuge     multiphase flow     CFD     dynamic mesh     porous media    

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Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 312-320 doi: 10.1007/s11465-017-0433-2

Abstract:

This study examines the development of the fluid and control technology of hydraulic wind turbinesThe current state of hydraulic wind turbines as a new technology is described, and its basic fluid model

Keywords： wind turbine     hydraulic system     fluid model     control technology    

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Investigation of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1149-1163 doi: 10.1007/s11705-021-2096-0

Abstract: To improve our understanding of the mechanisms of carbon dioxide photoreduction, a multiphysics modelThe novelty of this work is the computational fluid dynamic model combined with the novel carbon dioxidephotoreduction intrinsic reaction kinetic model, which was built based on three-steps, namely gas adsorptionand Beer-Lambert model.carbon dioxide and water moisture partial pressures was then modeled based on the intrinsic kinetic model

Keywords： carbon dioxide photoreduction     computational fluid dynamic simulation     kinetic model     Langmuir adsorption    

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Coupled solid-fluid FE-analysis of an embankment dam

Michael PERTL, Matthias HOFMANN, Guenter HOFSTETTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 53-62 doi: 10.1007/s11709-010-0084-4

Abstract: A coupled solid-fluid FE-model for partially saturated soils, characterized by modeling the soil as athree-phase material consisting of a deformable soil skeleton and the fluid phases water and air, isAs a constitutive model for the soil skeleton, the well-known Barcelona Basic model (BBM) is employedThe coupled FE-model is applied to the coupled transient numerical simulation of the water flow and the

Keywords： multi-phase model     unsaturated soil model     Barcelona Basic model (BBM)     return mapping algorithm     embankment    

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Modified landfill gas generation rate model of first-order kinetics and two-stage reaction

Jiajun CHEN , Hao WANG , Na ZHANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 313-319 doi: 10.1007/s11783-009-0025-4

Abstract: The first-order kinetics and two-stage reaction (FKTSR) model of the LFG generation rate includes mechanismsof the nutrient balance for biochemical reaction in two main stages.The model calibration was then calculated by using the experimental data.The results suggested that the new model was in line with the experimental data.The new model is better able to explain the mechanisms involved in LFG generation.

Keywords： landfill gas (LFG)     generation rate model     first-order kinetics     two-stage reaction     outflow function    

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Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using two-phaseair–water fluid

Ziyuan LIU, Hang GAO, Dongming GUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 294-302 doi: 10.1007/s11465-019-0576-4

Abstract: A high-efficiency polishing approach using two-phase air–water fluid (TAWF) is proposed to avoid surface

Keywords： potassium dihydrogen phosphate (KDP) crystal     controllable deliquescence     two-phase air–water fluid     high-efficiency    

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Numerical simulation of fluid dynamics in the stirred tank by the SSG Reynolds Stress Model

Nana QI, Hui WANG, Kai ZHANG, Hu ZHANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 506-514 doi: 10.1007/s11705-010-0508-7

Abstract: The Speziale, Sarkar and Gatski Reynolds Stress Model (SSG RSM) is utilized to simulate the fluid dynamicsCFD model data in terms of the flow field, trailing vortex, and the power number are compared with publishedThe comparison shows that the global fluid dynamics throughout the stirred tank and the local characteristicsThe power number predicted is quite close to the designed value, which demonstrates that this model canmodel turbulent fluid flow in the stirred tank, and it offers an alternative method for design and optimisation

Keywords： stirred tank     fluid dynamics     numerical simulation     SSG Reynolds Stress Model     MRF    

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Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Frontiers of Engineering Management   Pages 425-438 doi: 10.1007/s42524-022-0205-5

Abstract: A two-stage data envelopment analysis (DEA) model is developed in this study to analyze the efficiency

Keywords： envelopment analysis     environmental efficiency     environmental innovation system     shared resources     two-stage    

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CFD simulation of the hydrodynamics in an internal air-lift reactor with two different configurations

Mona EBRAHIMIFAKHAR, Elmira MOHSENZADEH, Sadegh MORADI, Mostafa MORAVEJI, Mahmoud SALIMI

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 455-462 doi: 10.1007/s11705-011-1116-x

Abstract: Computational fluid dynamics (CFD) was used to investigate the hydrodynamic parameters of two internalThe model was used to predict the effect of the reactor geometry on the reactor hydrodynamics.A two-phase flow model provided by the bubbly flow application mode was employed in this project.In the liquid phase, the turbulence can be described using the - model.

Keywords： airlift reactor     gas holdup     liquid circulation velocity     bubbly flow     computational fluid dynamics (CFD)    

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Developing a new model for simultaneous scheduling of two grand projects based on game theory and solvingthe model with Benders decomposition

Loghman PIRI, Vahidreza GHEZAVATI, Ashkan HAFEZALKOTOB

Frontiers of Engineering Management 2022, Volume 9, Issue 1,   Pages 117-134 doi: 10.1007/s42524-020-0115-3

Abstract: In this study, a mixed-integer programming model consisting of game theory and project scheduling isIn this model, two contractors in successive periods are entered into a step-by-step competition by theThis model can act dynamically in all circumstances during project implementation.Then, the results of our model are compared with those of the conventional models.The projects’ duration in our model is reduced by 22.2%.

Keywords： project scheduling     resource leveling between projects     constrained resources     game theory     Benders decomposition    

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Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 609-628 doi: 10.1007/s11709-018-0452-z

Abstract: In this paper, thermal fluid structure-interaction (TFSI) and coupled thermal-stress analysis are utilizeddedicated to calculate the lift and drag forces in addition to determining the lock-in regions once using fluid-structureScanlan benchmark is used to validate the TFSI models, where a good agreement was manifested between the two

Keywords： fire scenario     transient heat transfer     TFSI model     coupled thermal-stress     XFEM    

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A two-dimensional numerical model for eutrophication in Baiyangdian Lake

Xudong WANG, Shushen ZHANG, Suling LIU, Jingwen CHEN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 815-824 doi: 10.1007/s11783-011-0383-6

Abstract: An eutrophication eco-dynamics model including the effects of reed resistance on flow was coupled withThe model simulates water quality constituents associated with eutrophication in the lake, includingThe values calculated by the calibrated model agree well with field data, including ammonia nitrogen,Deviations between model-simulated and observed values are discussed.As an ideal tool for environmental management of the lake, this model can be used to predict its water

Keywords： eutrophication     eco-dynamics     hydrodynamics     improved Water Quality Analysis Simulation Program (WASP) model    

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Stormwater treatment: examples of computational fluid dynamics modeling

Gaoxiang YING, John SANSALONE, Srikanth PATHAPATI, Giuseppina GAROFALO, Marco MAGLIONICO, Andrea BOLOGNESI, Alessandro ARTINA

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 638-648 doi: 10.1007/s11783-012-0442-7

Abstract: This study applies the principles of computational fluid dynamics (CFD) to predict the particle and pollutantA standard turbulence model is used to resolve flow, and a discrete phase model (DPM) is utilized toCFD results closely follow physical model results across the entire range of flow rates.

Keywords： stormwater     unit operations and processes (UOPs)     hydrodynamic separation     filtration     adsorption     computational fluiddynamics (CFD)     turbulence modeling     discrete phase model     particle separation     detention/retention basins    

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Title Author Date Type Operation

Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Journal Article

MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layerfluid system

Hulin HUANG, Xiaoming ZHOU,

Journal Article

Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics

Chong PANG, Wei TAN, Endian SHA, Yuanqing TAO, Liyan LIU

Journal Article

Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Journal Article

Investigation of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid

Journal Article

Coupled solid-fluid FE-analysis of an embankment dam

Michael PERTL, Matthias HOFMANN, Guenter HOFSTETTER

Journal Article

Modified landfill gas generation rate model of first-order kinetics and two-stage reaction

Jiajun CHEN , Hao WANG , Na ZHANG ,

Journal Article

Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using two-phaseair–water fluid

Ziyuan LIU, Hang GAO, Dongming GUO

Journal Article

Numerical simulation of fluid dynamics in the stirred tank by the SSG Reynolds Stress Model

Nana QI, Hui WANG, Kai ZHANG, Hu ZHANG

Journal Article

Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Journal Article

CFD simulation of the hydrodynamics in an internal air-lift reactor with two different configurations

Mona EBRAHIMIFAKHAR, Elmira MOHSENZADEH, Sadegh MORADI, Mostafa MORAVEJI, Mahmoud SALIMI

Journal Article

Developing a new model for simultaneous scheduling of two grand projects based on game theory and solvingthe model with Benders decomposition

Loghman PIRI, Vahidreza GHEZAVATI, Ashkan HAFEZALKOTOB

Journal Article

Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

Journal Article

A two-dimensional numerical model for eutrophication in Baiyangdian Lake

Xudong WANG, Shushen ZHANG, Suling LIU, Jingwen CHEN

Journal Article

Stormwater treatment: examples of computational fluid dynamics modeling

Gaoxiang YING, John SANSALONE, Srikanth PATHAPATI, Giuseppina GAROFALO, Marco MAGLIONICO, Andrea BOLOGNESI, Alessandro ARTINA

Journal Article