MOTION AND DEPOSITION OF NON-BROWNIAN PARTICLES IN UPFLOW COLLECTORS

被引：14

作者：

BURGANOS, VN ^{[1
]}

PARASKEVA, CA ^{[1
]}

CHRISTOFIDES, PD ^{[1
]}

PAYATAKES, AC ^{[1
]}

机构：

[1] UNIV PATRAS,DEPT CHEM ENGN,GR-26500 PATRAI,GREECE

来源：

SEPARATIONS TECHNOLOGY | 1994年 / 4卷 / 01期

关键词：

PARTICLE DEPOSITION; TRAJECTORY ANALYSIS; UPFLOW FILTRATION; DEPTH FILTRATION;

D O I：

10.1016/0956-9618(94)80005-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The motion and deposition of suspended particles in upflow unit cells of sinusoidal shape are studied using a three-dimensional trajectory analysis. Particle stagnation and exclusion regions can develop at the entrance mouth of upflow cells, the extent and distribution of which depend on several parameters including particle size, flow rate, cell geometry, and cell inclination. It is found that the particle exclusion phenomenon can become very significant over a wide range of the preceding parameters and can have significant implications in network-based simulations of upflow or horizontal flow depth filtration. A new definition of the impacted fraction is introduced that is based on the particle entrance velocity and the actual entrance region. Calculations of the deposition rate in sinusoidal collectors indicate that switching from a down flow to an upflow mode results in increased or decreased capture efficiency depending, chiefly, on the inclination of the unit collector.

引用

页码：47 / 54

页数：8

共 16 条

[1]

Wegelin, Schertenleib, Boller, The decade of roughing filters—development of a rural water-treatment process for developing countries, J. Water SRT—Aqua, 40, (1991)

[2]

Wegelin, Boller, Schertenleib, Particle removal by horizontal-flow roughing filtration, J. Water SRT—Aqua, 36, (1987)

[3]

Burganos, Paraskeva, Payatakes, Three-dimensional trajectory analysis and network simulation of deep bed filtration, J. Colloid Interface Sci., 148, (1992)

[4]

Vitthal, Sharma, A stokesian dynamics model for particle deposition and bridging in granular media, J. Colloid Interface Sci., 153, (1992)

[5]

Imdakm, Sahimi, Computer simulation of particle transport processes in flow through porous media, Chem. Eng. Sci., 46, (1991)

[6]

Paraskeva, Burganos, Payatakes, THREE-DIMENSIONAL TRAJECTORY ANALYSIS OF PARTICLE DEPOSITION IN CONSTRICTED TUBES, Chemical Engineering Communications, 108, (1991)

[7]

Tilton, Payatakes, Collocation solution of creeping newtonian flow through sinusoidal tubes: A correction, AIChE J., 30, (1984)

[8]

Brenner, The slow motion of a sphere through a viscous fluid towards a plane surface, Chem. Eng. Sci., 16, (1961)

[9]

Goren, O'Neill, On the hydrodynamic resistance to a particle of a dilute suspension when in the neighbourhood of a large obstacle, Chem. Eng. Sci., 26, (1971)

[10]

O'Neill, A slow motion of viscous liquid caused by a slowly moving solid sphere, Mathematica, 11, (1964)

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