A numerical study is performed to investigate unsteady, two-dimensional, incompressible laminar flow over both sides of a slot-perforated flat surface in a pulsating channel flow. Consideration is given to the effects of the pulsating Strouhal number $fSr$, the Reynolds number Re, and the blockage factor, i.e., the ratio of plate thickness, $δ$, to channel width, $W$, on the heat-transfer performance and the velocity and thermal fields. It is found from the study that (i) time-averaged Nusselt number at the rear plate is amplified with Re, (ii) in contrast, the corresponding performance is attenuated with an increase in the blockage factor, whose effect becomes larger in the lower region of the Reynolds number, i.e., $Re=100$, and (iii) enhancement of the Nusselt number causes an increase in $fSr$, whose effect becomes minor near in the region of $Re=100$.

1.
Liang
,
C. Y.
, and
Yang
,
W.-J.
, 1975, “
Heat Transfer and Friction Loss Performance of Perforated Heat Exchanger Surface
,”
ASME Heat Transfer Conference
, San Francisco, CA, August, Vol.
97
, pp.
9
15
.
2.
Liang
,
C. Y.
, and
Yang
,
W.-J.
, 1975, “
Modified Single Blow Technique for Performance Evaluation on Heat Transfer Surface
,”
ASME Heat Transfer Conference
, San Francisco, CA, August, Vol.
97
, pp.
16
21
.
3.
Liang
,
C. Y.
,
Yang
,
W.-J.
, and
Hung
,
Y. Y.
, 1977, “
Perforated-Fin Type Compact Heat Exchangers for Gas Turbines
,”
1977 Tokyo Joint Gas Turbine Congress
, Tokyo, Japan, May, pp.
77
85
.
4.
Lee
,
C. P.
, and
Yang
,
W.-J.
, 1978, “
Augmentation of Convective Heat Transfer From High-Porosity Perforated Surfaces
,”
Heat Mass Transfer 1978
, Toronto, ON, August, Vol.
2
, pp.
589
594
.
5.
Fujii
,
M.
,
Seshimo
,
S.
, and
Yamanaka
,
G.
, 1988, “
Heat Transfer and Pressure Drop of Perforated Surface Heat Exchanger With Passage Enlargement and Contraction
,”
Int. J. Heat Mass Transfer
0017-9310,
31
(
1
), pp.
135
142
.
6.
Hwang
,
G. J.
,
Wu
,
C. C.
,
Lin
,
L. C.
, and
Yang
,
W.-J.
, 1996, “
Investigation of Flow Drag and Forced Convective Heat Transfer in Perforated Coolant Channels
,”
Transport Phenomena in Combustion
, Vol.
2
,
Taylor & Francis
,
London
, pp.
1747
1758
.
7.
Liang
,
C. Y.
,
Lee
,
C. P.
, and
Yang
,
W.-J.
, 1976, “
Visualization of Fluid Flow Past Perforated Surfaces
,”
Proceedings of the Japanese Fourth Symposium on Flow Visualization
, Tokyo, Japan, October, pp.
69
73
.
8.
Liang
,
C. Y.
, 1975, “
Heat Transfer, Flow Friction, Noise and Vibration Studies of Perforated Surface
,” Ph.D. thesis, University of Michigan, Ann Arbor, Michigan.
9.
Torii
,
S.
, and
Yang
,
W.-J.
, 1998, “
Flow Over a Slot-Perforated Flat Surface Between Two Parallel Plates
,”
Proceedings of the Eighth International Symposium of Flow Visualization
, Sorrento, Italy, September, Vol.
6
, pp.
1
8
.
10.
Torii
,
S.
,
Yang
,
W.-J.
, and
Umeda
,
S.
, 1998, “
Flow Visualization and Transport Phenomena Over a Slot-Perforated Flat Surface Between Two Parallel Plates
,”
J. Flow Visualization Image Process.
1065-3090,
5
, pp.
63
80
.
11.
Amon
,
C. H.
, and
Mikic
,
B. B.
, 1991, “
Spectral Element Simulations of Unsteady Forced Convective Heat Transfer: Application to Compact Heat Exchanger Geometries
,”
Numer. Heat Transfer, Part A
1040-7782,
19
, pp.
1
19
.
12.
Suzuki
,
K.
,
Xi
,
G. N.
,
Inaoka
,
K.
, and
Hagiwara
,
Y.
, 1994, “
Mechanism of Heat Transfer Enhancement Due to Self-Sustained Oscillation for In-Line Fin Array
,”
Int. J. Heat Mass Transfer
0017-9310,
37
, pp.
83
96
.
13.
Nigen
,
J. S.
, and
Amon
,
C. H.
, 1994, “
Time-Dependent Conjugate Heat Transfer Characteristics of Self-Sustained Oscillatory Flows in a Grooved Channel
,”
ASME J. Fluids Eng.
0098-2202,
116
, pp.
499
507
.
14.
Harlow
,
F. H.
, and
Welch
,
E. J.
, 1965, “
Numerical Calculation of Time-Dependent Viscous Incompressible Flow of Fluid With Free Surface
,”
Phys. Fluids
0031-9171,
8
, pp.
2182
2189
.
15.
Hirt
,
C. W.
,
Nichols
,
B. D.
, and
Romero
,
N. C.
, 1975, “
SOLA-A Numerical Solution Algorithm for Transient Fluid Flows
,”
LASL
Report No. LA-5852.
16.
Torii
,
S.
, and
Yang
,
W.-J.
, 2002, “
Thermal Transport Phenomena Over a Slot-Perforated Flat Surface in Pulsating Free Stream
,”
Int. J. Therm. Sci.
,
41
, pp.
241
252
. 1290-0729
17.
Marty
,
Ph.
,
Michel
,
F.
, and
Tochon
,
P.
, 2008, “
Experimental and Numerical Study of the Heat Transfer Along a Blunt Flat Plate
,”
Int. J. Heat Mass Transfer
,
51
, pp.
13
23
. 0017-9310