In this study, we investigate the phenomena of flow streaming in micro-/minichannel networks of symmetrical bifurcations using computer simulations with analytical validation. The phenomena of the flow streaming can be found in zero-mean velocity oscillating flows in a wide range of channel geometries. Although there is no net mass flow (zero-mean velocity) passing through the channels, the discrepancy in velocity profiles between the forward flow and backward flow causes fluid particles near the walls to drift toward one end while particles near the centerline to drift toward the opposite end. The unique characteristics of flow streaming could be used for various applications. The advantages include enhanced mixing, pumpless fluid propulsion, multichannel fluid distribution, easy system integration, and cost-effective operation. The results of computer simulations showed that oscillation amplitude is the dominant effect on streaming velocity in channel networks. Streaming velocity was directly proportional to the oscillation frequency and can be used as a cost-effective and reliable convective transport means when the particle diffusivity is less than the fluid kinematic viscosity. A considerable amount of work is needed to further study and understand the flow streaming phenomenon.

1.
Nyborg
,
W. L.
, 1953, “
Acoustic Streaming Due to Attenuated Plane
,”
J. Acoust. Soc. Am.
0001-4966,
25
(
1
), pp.
68
75
.
2.
Rosenblat
,
S.
, 1959, “
Torsional Oscillation of a Plane in Viscous Fluids
,”
J. Fluid Mech.
0022-1120,
6
, pp.
206
220
.
3.
Rosenblat
,
S.
, 1960, “
Flow Between Torsional Oscillating Disks
,”
J. Fluid Mech.
0022-1120,
8
, pp.
388
399
.
4.
Riley
,
N.
, 1965, “
Oscillating Viscous Flows
,”
Mathematika
0025-5793,
12
, pp.
161
170
.
5.
Riley
,
N.
, 1967, “
Oscillating Viscous Flows, Review and Extension
,”
J. Appl. Math.
1110-757X,
3
, pp.
419
434
.
6.
Jones
,
A. F.
, and
Rosenblat
,
S.
, 1969, “
The Flow Induced by Torsional Oscillations of Infinite Planes
,”
J. Fluid Mech.
0022-1120,
37
(
2
), pp.
337
347
.
7.
Lyne
,
W. H.
, 1970, “
Unsteady Viscous Flow in a Curved Tube
,”
J. Fluid Mech.
0022-1120,
45
(
13
), pp.
15
31
.
8.
Haselton
,
F. R.
, and
Scherer
,
P. W.
, 1982, “
Flow Visualization of Steady Streaming in Oscillatory Flow Through a Bifurcation Tube
,”
J. Fluid Mech.
0022-1120,
123
, pp.
315
333
.
9.
Simon
,
B.
,
Weinmann
,
G.
, and
Mitzner
,
W.
, 1982, “
Significance of Mean Airway Pressure During High Frequency Ventilation
,”
Physiologist
0031-9376,
25
, pp.
282
293
.
10.
Tarbell
,
J. M.
,
Ultman
,
J. S.
, and
Durlofsky
,
L.
, 1982, “
Oscillatory Convection Dispersion in a Branching Tube Network
,”
J. Biomech. Eng.
0148-0731,
104
(
4
), pp.
338
342
.
11.
Grotberg
,
J. B.
, 1984, “
Volume Cycled Oscillatory Flow in a Tapered Channel
,”
J. Fluid Mech.
0022-1120,
141
(
1
), pp.
249
264
.
12.
Gaver
,
D. P.
, and
Grotberg
,
J. B.
, 1986, “
An Experimental Investigation of Oscillating Flow in a Tapered Channel
,”
J. Fluid Mech.
0022-1120,
172
(
1
), pp.
47
61
.
13.
Briant
,
J. K.
, and
Lippmann
,
M.
, 1992, “
Particle Transport Through a Hollow Canine Airway Cast by High-Frequency Oscillatory Ventilation
,”
Exp. Lung Res.
0190-2148,
18
(
3
), pp.
385
407
.
14.
Goldberg
,
I. S.
,
Zhang
,
Z.
, and
Tran
,
M.
, 1999, “
Steady Streaming of Fluid in the Entrance Region of a Tube During Oscillatory Flow
,”
Phys. Fluids
1070-6631,
11
(
10
), pp.
2957
2962
.
15.
Zhang
,
Z.
,
Fadl
,
A.
,
Liu
,
C.
, and
Meyer
,
D. M. L.
, 2008, “
A Streaming Flow Based Lab-On-Chip Platform Technology
,”
Proceedings of ASME Micro/Nanoscale Heat Transfer International Conference (MNHT08)
, Tainan, Taiwan, Paper No. MNHT2008-52283.
16.
Fresconi
,
F. E.
,
Wexler
,
A. S.
, and
Prasad
,
A. K.
, 2003, “
Expiration Flow in a Symmetric Bifurcation
,”
Exp. Fluids
0723-4864,
35
(
5
), pp.
493
501
.
17.
White
,
F.
, 2003,
Fluid Mechanics
,
McGraw-Hill
,
New York
, pp.
296
306
.
18.
Richardson
,
E. G.
, and
Tyler
,
E.
, 1929, “
The Transverse Velocity Gradient Near the Mouths of Pipes in Which an Alternating or Continuous Flow of Air Is Established
,”
Proc. Phys. Soc.
,
42
(
1
), pp.
1
15
. 0370-1328
19.
Sexl
,
T.
, 1930, “
Uber Den Von E. G. Richardson Entdeckten Annular Effekt
,”
Z. Phys.
0044-3328,
61
(
5–6
), pp.
349
362
.
20.
Uchida
,
S.
, 1956, “
The Pulsating Viscous Flow Superposed on the Steady Laminar Motion of Incompressible Fluid in a Circular Pipe
,”
Z. Angew. Math. Phys.
0044-2275,
7
(
5
), pp.
403
421
.
You do not currently have access to this content.