THE MOTION OF RODLIKE PARTICLES IN THE PRESSURE-DRIVEN FLOW BETWEEN 2 FLAT PLATES

被引:85
作者
STOVER, CA
COHEN, C
机构
[1] Department of Chemical Engineering School of Chemical Engineering, Cornell University, Ithaca, 14853, New York, Olin Hall
关键词
Newtonian fluid; non-Newtonian fluid; Rodlike particle; shear flow; wall effect;
D O I
10.1007/BF01331355
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The motion of freely suspended rodlike particles has been observed in the pressure-driven flow between the two flat plates of a Hele Shaw flow cell at low Reynolds numbers. Data are reported for rodlike particles with aspect ratios of 12.0 suspended in a Newtonian fluid for gap thickness to particle length ratios of 3, 6, and 20; and for rodlike particles with aspect ratios between 5 and 8 in a non-Newtonian fluid (79.25 wt.% water, 20.2 wt.% glycerine, and 0.55 wt.% polyacrylamide). For the Newtonian fluid, the time-dependent orientation of the particles near and far from walls was shown to be in quantitative agreement with Jeffery's theory for ellipsoids suspended in a simple shear flow if an effective aspect ratio is calculated from the experimental period of rotation. Particles aligned with the flow direction and less than a particle half-length from a wall interacted irreversibly with the wall. For the non-Newtonian fluid, the timedependent orientation far from a wall was shown to be in qualitative agreement with Leal's theory for a second-order fluid; however, particles that were aligned with the flow direction and were near walls did not rotate. © 1990 Steinkopff.
引用
收藏
页码:192 / 203
页数:12
相关论文
共 28 条
[1]   KINETICS OF FLOWING DISPERSIONS .4. TRANSIENT ORIENTATIONS OF CYLINDERS [J].
ANCZUROW.E ;
COX, RG ;
MASON, SG .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1967, 23 (04) :547-&
[2]  
Bartok W., 1957, J COLLOID SCI, V12, P243, DOI [10.1016/0095-8522(57)90010-7, DOI 10.1016/0095-8522(57)90010-7]
[3]   PARTICLE MOTIONS IN NON-NEWTONIAN MEDIA .3. FURTHER OBSERVATIONS IN ELASTOVISCOUS FLUIDS [J].
BARTRAM, E ;
GOLDSMITH, HL ;
MASON, SG .
RHEOLOGICA ACTA, 1975, 14 (09) :776-782
[4]   SLENDER-BODY THEORY FOR PARTICLES OF ARBITRARY CROSS-SECTION IN STOKES FLOW [J].
BATCHELOR, GK .
JOURNAL OF FLUID MECHANICS, 1970, 44 (NOV26) :419-+
[5]  
Bird RB, 1987, DYNAMICS POLYM LIQUI, V91, P1397, DOI DOI 10.1016/0377-0257(78)80009-3
[6]  
BRENNER H, 1974, J COLLOID INTERF SCI, V47, P199, DOI 10.1016/0021-9797(74)90093-9
[7]   THE MOTION OF RIGID PARTICLES IN A SHEAR FLOW AT LOW REYNOLDS NUMBER [J].
BRETHERTON, FP .
JOURNAL OF FLUID MECHANICS, 1962, 14 (02) :284-304
[8]   MOTION OF A SLIGHTLY DEFORMED SPHERE IN A VISCOELASTIC FLUID [J].
BRUNN, P .
RHEOLOGICA ACTA, 1979, 18 (02) :229-243
[9]   SLOW MOTION OF A RIGID PARTICLE IN A 2ND-ORDER FLUID [J].
BRUNN, P .
JOURNAL OF FLUID MECHANICS, 1977, 82 (SEP27) :529-547
[10]   HYDROMECHANICS OF LOW-REYNOLDS-NUMBER FLOW .3. MOTION OF A SPHEROIDAL PARTICLE IN QUADRATIC FLOWS [J].
CHWANG, AT .
JOURNAL OF FLUID MECHANICS, 1975, 72 (NOV11) :17-34