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Tiscar J, Llorens D, Mallol G, Boix J, Pérez J, Gilabert F. DEM-based modelling framework for spray-dried powders in ceramic tiles industry. Part III: Validation procedure. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.05.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
The particles, water and oil three-phase flow behaviors at the pore scale is significant to clarify the dynamic mechanism in the particle flooding process. In this work, a newly developed direct numerical simulation techniques, i.e., VOF-FDM-DEM method is employed to perform the simulation of several different particle flooding processes after water flooding, which are carried out with a porous structure obtained by CT scanning of a real rock. The study on the distribution of remaining oil and the displacement process of viscoelastic particles shows that the capillary barrier near the location with the abrupt change of pore radius is the main reason for the formation of remaining oil. There is a dynamic threshold in the process of producing remaining oil. Only when the displacement force exceeds this threshold, the remaining oil can be produced. The flow behavior of particle–oil–water under three different flooding modes, i.e., continuous injection, alternate injection and slug injection, is studied. It is found that the particle size and the injection mode have an important influence on the fluid flow. On this basis, the flow behavior, pressure characteristics and recovery efficiency of the three injection modes are compared. It is found that by injecting two kinds of fluids with different resistance increasing ability into the pores, they can enter into different pore channels, resulting in the imbalance of the force on the remaining oil interface and formation of different resistance between the channels, which can realize the rapid recovery of the remaining oil.
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Zhou L, Zhao Y. CFD-DEM simulation of fluidized bed with an immersed tube using a coarse-grain model. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116290] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tiscar J, Escrig A, Mallol G, Boix J, Gilabert F. DEM-based modelling framework for spray-dried powders in ceramic tiles industry. Part II: Solver implementation. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.08.095] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Su J, Chai G, Wang L, Yu J, Cao W, Gu Z, Chen C, Meng W. Direct numerical simulation of particle pore-scale transport through three-dimensional porous media with arbitrarily polyhedral mesh. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.04.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang P, Zang M, Zeng H. An efficient 3D DEM-FEM contact detection algorithm for tire-sand interaction. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.10.069] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ma H, Zhao Y, Cheng Y. CFD-DEM modeling of rod-like particles in a fluidized bed with complex geometry. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.12.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Discrete element model of particle transport and premixing action in modified screw conveyors. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.06.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xu L, Luo K, Zhao Y, Fan J, Cen K. Multiscale investigation of tube erosion in fluidized bed based on CFD-DEM simulation. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.02.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tian Y, Zhang S, Lin P, Yang Q, Yang G, Yang L. Implementing discrete element method for large-scale simulation of particles on multiple GPUs. Comput Chem Eng 2017. [DOI: 10.1016/j.compchemeng.2017.04.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhang W, Ruan X, Ma Y, Jiang X, Zheng W, Liu Y, He G. Modeling and simulation of mitigating membrane fouling under a baffle-filled turbulent flow with permeate boundary. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.01.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Zheng Z, Zang M, Chen S, Zhao C. An improved 3D DEM-FEM contact detection algorithm for the interaction simulations between particles and structures. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2016.09.076] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Su J, Huang C, Gu Z, Chen C, Xu X. An Efficient RIGID Algorithm and Its Application to the Simulation of Particle Transport in Porous Medium. Transp Porous Media 2016. [DOI: 10.1007/s11242-016-0729-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wu WT, Martin AB, Gandini A, Aubry N, Massoudi M, Antaki JF. Design of microfluidic channels for magnetic separation of malaria-infected red blood cells. MICROFLUIDICS AND NANOFLUIDICS 2016; 20:41. [PMID: 27761107 PMCID: PMC5066816 DOI: 10.1007/s10404-016-1707-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 01/09/2016] [Indexed: 05/25/2023]
Abstract
This study is motivated by the development of a blood cell filtration device for removal of malaria-infected, parasitized red blood cells (pRBCs). The blood was modeled as a multi-component fluid using the computational fluid dynamics discrete element method (CFD-DEM), wherein plasma was treated as a Newtonian fluid and the red blood cells (RBCs) were modeled as soft-sphere solid particles which move under the influence of drag, collisions with other RBCs, and a magnetic force. The CFD-DEM model was first validated by a comparison with experimental data from Han et al. 2006 (Han and Frazier 2006) involving a microfluidic magnetophoretic separator for paramagnetic deoxygenated blood cells. The computational model was then applied to a parametric study of a parallel-plate separator having hematocrit of 40% with a 10% of the RBCs as pRBCs. Specifically, we investigated the hypothesis of introducing an upstream constriction to the channel to divert the magnetic cells within the near-wall layer where the magnetic force is greatest. Simulations compared the efficacy of various geometries upon the stratification efficiency of the pRBCs. For a channel with nominal height of 100 µm, the addition of an upstream constriction of 80% improved the proportion of pRBCs retained adjacent to the magnetic wall (separation efficiency) by almost 2 fold, from 26% to 49%. Further addition of a downstream diffuser reduced remixing, hence improved separation efficiency to 72%. The constriction introduced a greater pressure drop (from 17 to 495 Pa), which should be considered when scaling-up this design for a clinical-sized system. Overall, the advantages of this design include its ability to accommodate physiological hematocrit and high throughput - which is critical for clinical implementation as a blood-filtration system.
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Affiliation(s)
- Wei-Tao Wu
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Andrea Blue Martin
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Alberto Gandini
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Nadine Aubry
- Department of Mechanical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Mehrdad Massoudi
- U. S. Department of Energy, National Energy Technology Laboratory (NETL), PA, 15236, USA
| | - James F. Antaki
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
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Dong K, Wang C, Yu A. A novel method based on orientation discretization for discrete element modeling of non-spherical particles. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.12.059] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Su J, Gu Z, Zhang M, Xu XY. An improved version of RIGID for discrete element simulation of particle flows with arbitrarily complex geometries. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2013.12.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Development and test of CFD–DEM model for complex geometry: A coupling algorithm for Fluent and DEM. Comput Chem Eng 2013. [DOI: 10.1016/j.compchemeng.2013.07.006] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gu Z, Wei W, Su J, Yu CW. The role of water content in triboelectric charging of wind-blown sand. Sci Rep 2013; 3:1337. [PMID: 23434920 PMCID: PMC3580324 DOI: 10.1038/srep01337] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 02/07/2013] [Indexed: 11/09/2022] Open
Abstract
Triboelectric charging is common in desert sandstorms and dust devils on Earth; however, it remains poorly understood. Here we show a charging mechanism of sands with the adsorbed water on micro-porous surface in wind-blown sand based on the fact that water content is universal but usually a minor component in most particle systems. The triboelectric charging could be resulted due to the different mobility of H(+)/OH(-) between the contacting sands with a temperature difference. Computational fluid dynamics (CFD) and discrete element method (DEM) were used to demonstrate the dynamics of the sand charging. The numerically simulated charge-to-mass ratios of sands and electric field strength established in wind tunnel agreed well with the experimental data. The charging mechanism could provide an explanation for the charging process of all identical granular systems with water content, including Martian dust devils, wind-blown snow, even powder electrification in industrial processes.
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Affiliation(s)
- Zhaolin Gu
- Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, Shanxi, 710049, P.R. China.
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Influence of drag force correlations on periodic fluidization behavior in Eulerian–Lagrangian simulation of a bubbling fluidized bed. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.03.038] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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