Development of numerical Eulerian-Eulerian models for simulating multiphase pumps

Suh, Jun Won; Kim, Jin‐Hyuk; Choi, Young Seok; Joo, Won-Gu; Lee, Kyoung Yong

doi:10.1016/j.petrol.2017.10.073

Cited by 71 publications

(24 citation statements)

References 17 publications

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“…With the technological development of Computational Fluid Dynamics (CFD), CFD simulation has become a primary tool to investigate the internal flow in multiphase pumps (Caridad and Kenyery, 2004;Pineda et al, 2016). Also, the Euler two-fluid model has been applied more widely in the related simulation because of its higher calculation precision than other two-phase models such as mixture model and drift flow model, among others (Suh et al, 2018, Zhang et al, 2018a. In this model, each medium has its own governing equations, that is, each medium has its own velocity field but share the same pressure field and the phase interaction between the two phases is considered (Lane et al, 2005;Zhang et al, 2018b;Yan et al, 2017;Yu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Zhang

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Pressure fluctuation in single-phase pumps has been studied widely, while less attention has been paid to research on multiphase pumps that are commonly used in the petroleum chemical industry. Therefore, this study investigates the pressure fluctuation for a multiphase rotodynamic pump handling air–water two-phase flow. Simulations based on the Euler two-fluid model were carried out using ANSYS_CFX16.0 at different Inlet Gas Void Fractions (IGVFs) and various flow rate values. Under conditions of IGVF = 0% (pure water) and IGVF = 15%, the accuracy of the numerical method was tested by comparing the experimental data. The results showed that the rotor–stator interaction was still the main generation driver of pressure fluctuation in gas–liquid two-phase pumps. However, the fluctuation near the impeller outlet ascribe to the rotor–stator interaction was weakened by the complex gas–liquid flow. For the different IGVF, the variation trend of fluctuation was similar along the streamwise direction. That is, the fluctuation in the impeller increased before decreasing, while in the guide vane it decreased gradually. Also, the fluctuation in the guide vane was generally greater than for the impeller and the maximum amplitude appeared in the vicinity of guide vane inlet.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Zhang

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…(15) [158]. F I,i is the sum of all interfacial forces acting on phase i from the other phase [159]. These forces are not considered in the VOF method and include drag force, lift force, virtual mass force, wall lubrication force and turbulent dispersion force.…”

Section: Euler-euler Approachmentioning

confidence: 99%

Oxygen Mass Transfer in Biopharmaceutical Processes: Numerical and Experimental Approaches

Seidel

Maschke

Werner

et al. 2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Dedicated to Prof. Dr.-Ing. Matthias Kraume on the occasion of his 65th birthday Oxygen supply in aerobic bioprocesses is of crucial importance. For this reason, this paper presents the oxygen demand of different cells and summarizes experimental and numerical possibilities for the determination of oxygen transfer in bioreactors. The focus lies on the volumetric oxygen mass transfer coefficient (k L a) calculation using computational fluid dynamics and state-of-the-art models for surface-aerated and forced-aerated bioreactors. In addition, experimental methods for the determination of the k L a value and the gas bubble size distribution are presented.

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“…Barrios et al [11] calculated the two phases flow of the ESP and researched the effect of bubble size and gas resistance coefficient on the flow characteristics of the ESP through experimental verification. Suh et al [12] conducted numerical analysis on the axial-flow mixed transport pump under different air holdup conditions and concluded that with the increase of air holdup, the blockage of flow passage reduced the pump performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Diversion Cavity Geometry on the Performance of Gas-Liquid Two-Phase Mixed Transport Pump

Luo

Feng

et al. 2020

Energies

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For the purpose of improving the transport capability of the mixed transport pump, a new self-made three-stage deep-sea multiphase pump was taken as the research object. Based on the Euler-Euler heterogeneous flow model, liquid (water) and gas (air) are used as the mixed media to study the external characteristics and internal flow identities of the mixed pump under different gas volume fraction (GVF) conditions. According to the simulation results, a local optimal design scheme of the diversion cavity in the dynamic and static connection section is proposed. The numerical results before and after the optimization are compared and analyzed to explore the effect of the diversion cavity optimization on the performance, blade load and internal flow identities of the pump. The results show that the head and efficiency are obviously improved when the inner wall of the diversion cavity is reduced by 4 mm along the radial direction. After optimization, under the condition of 10% gas content, the head and efficiency is increased by 3.73% and 2.91% respectively. Meanwhile, the hydraulic losses of the diversion cavity and diffuser are reduced by 9.11% and 4.32% respectively. The gas distribution in the impeller is improved obviously and the phenomenon of a large amount of gas phase accumulation is eliminated in the channel. In addition, the abnormal pressure load on the blade surface is eliminated and the turbulent flow energy intensity is reduced. The average turbulent kinetic energy ( T K ) at i = 0.51 of the first stage impeller passage is reduced by 35%. Finally, the reliability of the numerical method is verified by the experimental results. To sum up, the performance and internal flow identities of the optimized mixed transport pump are improved, which verifies the availability and applicability of the optimization results. This provides a reference for the research and design of a multiphase mixed transport pump in the future.

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Development of numerical Eulerian-Eulerian models for simulating multiphase pumps

Cited by 71 publications

References 17 publications

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Oxygen Mass Transfer in Biopharmaceutical Processes: Numerical and Experimental Approaches

Effect of Diversion Cavity Geometry on the Performance of Gas-Liquid Two-Phase Mixed Transport Pump

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