CFD Simulation of Multiphase Flow by Mud Agitator in Drilling Mud Mixing System
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
In this study, a computational fluid dynamics (CFD) simulation based on an Eulerian-Eulerian approach was used to evaluate the mixing performance of a mud agitator through the distribution of bulk particles. Firstly, the commercial CFD software Star-CCM+ was verified by performing numerical simulations of single-phase water mixing problems in an agitator with various turbulence models, and the simulation results were compared with an experiment. The standard model was selected as an appropriate turbulence model, and a grid convergence test was performed. Then, a simulation of the liquid-solid multi-phase mixing in an agitator was simulated with different multi-phase interaction models, and lift and drag models were selected. In the case of the lift model, the results were not significantly affected, but Syamlal and O’Brien’s drag model showed more reasonable results with respect to the experiment. Finally, with the properly determined simulation conditions, a multi-phase flow simulation of a mud agitator was performed to predict the mixing time and spatial distribution of solid particles. The applicability of the CFD multi-phase simulation for the practical design of a mud agitator was confirmed.
Abstract
In this study, a computational fluid dynamics (CFD) simulation based on an Eulerian-Eulerian approach was used to evaluate the mixing performance of a mud agitator through the distribution of bulk particles. Firstly, the commercial CFD software Star-CCM+ was verified by performing numerical simulations of single-phase water mixing problems in an agitator with various turbulence models, and the simulation results were compared with an experiment. The standard model was selected as an appropriate turbulence model, and a grid convergence test was performed. Then, a simulation of the liquid-solid multi-phase mixing in an agitator was simulated with different multi-phase interaction models, and lift and drag models were selected. In the case of the lift model, the results were not significantly affected, but Syamlal and O’Brien’s drag model showed more reasonable results with respect to the experiment. Finally, with the properly determined simulation conditions, a multi-phase flow simulation of a mud agitator was performed to predict the mixing time and spatial distribution of solid particles. The applicability of the CFD multi-phase simulation for the practical design of a mud agitator was confirmed.
참고문헌 (21)
- 안익진, "자유표면을 고려한 교반기 내부의 비정상 유동해석", 한국전산유체공학회지, 11(4), pp.9~13 (2006), 한국전산유체공학회
- T. R. Auton, "The lift force on a spherical body in a rotational flow", Journal of Fluid Mechanics, 183, pp.199~218 (1987), Cambridge University Press (CUP)[DOI]
- Release 9.02 STAR-CCM+ User Guide Manual, "CD-Adapco", ~ (2014)
- Chang, J., "Flow Simulation of a 45° Pitched Paddle Type Mixer", Proceedings of Fall Conference of the Korean Society of Computational Fluid Engineering, pp.109~114 (2000)
- 최영욱, "교반기 내 터빈 임펠러 형태에 따른 교반성능에 대한 수치해석적 연구", 한국유체기계학회 논문집, 16(1), pp.47~55 (2013), 한국유체기계학회[DOI]
- Anders Darelius, "CFD simulation of the high shear mixing process using kinetic theory of granular flow and frictional stress models", Chemical Engineering Science, 63(8), pp.2188~2197 (2008), Elsevier BV[DOI]
- Jianmin Ding, "A bubbling fluidization model using kinetic theory of granular flow", AIChE Journal, 36(4), pp.523~538 (1990), Wiley[DOI]
- Kalekudithi Ekambara, "Hydrodynamic Simulation of Horizontal Slurry Pipeline Flow Using ANSYS-CFX", Industrial & Engineering Chemistry Research, 48(17), pp.8159~8171 (2009), American Chemical Society (ACS)[DOI]
- Gidaspow, D., "Multiphase Flow and Fluidization - Continuum and Kinetic Theory Descriptions" (1994), Academic Press
- Guida, A., "Positron Emixxion Particle Tracking Applied to Solid-Liquid Mixing in Mechanically Agitated Vessels", Ph.D., pp.2010
- A. Guida, "Positron emission particle tracking in a mechanically agitated solid–liquid suspension of coarse particles", Chemical Engineering Research and Design, 87(4), pp.421~429 (2009), Elsevier BV[DOI]
- 김치겸, "배플 형상에 따른 교반기 내부 고체입자 분포의 비정상상태 해석", 한국전산유체공학회지, 14(4), pp.1~6 (2009), 한국전산유체공학회
- 김태영, "혼합효율 개선을 위한 Shear Mixer의 시뮬레이션 기반 형상 설계", 한국해양환경•에너지학회지, 20(2), pp.107~116 (2017), 한국해양환경·에너지학회
- Kubicki, D., "CFD Predictions of Solids Distribution in Stirred Vessel", Ninth International Conference on CFD in the Minerals and Process Industries (2012)
- T. Kumaresan, "Effect of impeller design on the flow pattern and mixing in stirred tanks", Chemical Engineering Journal, 115(3), pp.173~193 (2006), Elsevier BV[DOI]
- Lo, S., "Multiphase Flow Models in STAR-CCM+", STAR Japanese Conference 2012 (2012)
- S. Nagata, "Flow Patterns of Liquid in a Cylindrical Mixing Vessel without Baffles", Chemical engineering, 23(3), pp.130~137 (1959), Society of Chemical Engineers, Japan[DOI]
- A.W. Nienow, "On impeller circulation and mixing effectiveness in the turbulent flow regime", Chemical Engineering Science, 52(15), pp.2557~2565 (1997), Elsevier BV[DOI]
- Schaeffer, D. G., "Instability in the Evolution Equations Describing Incompressive Granular Flows", Jounal of Differential Equations, 66, pp.19~50 (1987)
- Syamlal, M., "Computer Simulation of Bubbles in a Fluidized Bed", AIChE Symp. Ser., 85(270), pp.22~31 (1989)
- Divyamaan Wadnerkar, "CFD simulation of solid–liquid stirred tanks", Advanced Powder Technology, 23(4), pp.445~453 (2012), Elsevier BV[DOI]