Turbulent impinging jets on heated surfaces are widely used in industry to modify local heat transfer coefficients. The addition of a porous substrate covering the surface contributes to a better flow distribution, which favors many engineering applications. Motivated by this, the present work shows numerical results for a turbulent impinging jet against a cylindrical enclosure with and without a porous layer at the bottom. The macroscopic time-averaged equations for mass, momentum and energy are obtained based on a concept called double decomposition, which considers spatial deviations and temporal fluctuations of flow properties. The numerical technique employed for discretizing the governing equations is the control volume method in conjunction with a boundary-fitted non-orthogonal coordinate system. The SIMPLE algorithm is used to handle the pressure-velocity coupling. The influence of characteristics of the porous layer on the mean and statistical flow fields within the cylinder is presented.

Volume Subject Area:
Fluids Engineering
Topics:
Turbulence, Flow (Dynamics), Algorithms, Cylinders, Engineering systems and industry applications, Fluctuations (Physics), Heat transfer coefficients, Jets, Momentum, Pressure
1.
Baydar
E.
,
1999
, “
Confined Impinging Air Jet at Low Reynolds Numbers
,”
Experimental Thermal and Fluid Science
,
19
, pp.
27
–
33
.
2.
Chalupa
R.
,
Chen
M.
,
West
A. C.
,
Modi
V.
,
2001
, “
High Schmidt Mass Transfer in a Turbulent Impinging Slot Jet
,”
International Journal of Heat and Mass Transfer
,
44
, pp.
3775
–
3785
.
3.
Park
T. H.
,
Choi
H. G.
,
Yoo
J. Y.
,
Kim
S. J.
,
2003
, “
Streamline Upwind Numerical Simulation of Two-Dimensional Confined Impinging Slot Jets
,”
International Journal of Heat and Mass Transfer
, Vol.
46
, pp.
251
–
262
.
4.
Vafai
K.
,
Kim
S. J.
,
1990
, “
Analysis of surface enhancement by a porous substrate
,”
Journal of Heat Transfer
,
112
,
700
–
706
.
5.
Huang
P. C.
,
Vafai
K.
,
1993
, “
Flow and heat transfer control over an external surface using a porous block array arrangement
.”
International Journal of Heat and Mass Transfer
,
36
,
4019
–
4032
.
6.
Hadim
A.
,
1994
, “
Forced convection in a porous channel with localized heat sources
,”
Journal of Heat Transfer
,
116
,
465
–
472
.
7.
Prakash
M.
,
Turan
F. O.
,
Li
Y.
,
Manhoney
J.
,
Thorpe
G. R.
,
2001
a,
Impinging Round Jet Studies In A Cilindrical Enclosure With And Without A Porous Layer: Part I: Flow Visualisations And Simulations
,
Chemical Engrg. Science
, Vol.
56
, pp.
3855
–
3878
8.
Prakash
M.
,
Turan
F. O.
,
Li
Y.
,
Manhoney
J.
,
Thorpe
G. R.
,
2001
b,
Impinging Round Jet Studies In A Cilindrical Enclosure With And Without A Porous Layer: Part II: DLV Measurements And Simulations
,
Chemical Engrg. Science
, Vol.
56
, pp.
3879
–
3892
9.
Fu
W.-S.
,
Huang
H.,-C
,
1997
, “
Thermal performance of different shape porous blocks under an impinging jet
,”
International Journal of Heat and Mass Transfer
, Vol.
40
, No.
10
, pp.
2261
–
2272
.
10.
Pedras
M. H. J.
,
de Lemos
M. J. S.
,
2000
,
On the Definition of Turbulent Kinetic Energy for Flow in Porous Media
,
Intern. Comm. Heat and Mass Transfer
,
27
(
2
),
211
–
220
.
11.
Pedras
M. H. J.
,
de Lemos
M. J. S.
,
2001
a, “
Macroscopic Turbulence Modeling For Incompressible Flow Through Undeformable Porous Media
,”
Int. J. Heat Transfer
, vol.
44
, n.
6
, pp.
1081
–
1093
.
12.
Pedras
M. H. J.
,
de Lemos
M. J. S.
,
2001
b, “
Simulation of Turbulent Flow in Porous Media Using a Spatially Periodic Array and a Low Re Two-Equation Closure
,”
Numer. Heat Transfer Part A-Appl
, vol.
39
, n.
1
, pp.
35
–
59
.
13.
Gray
W. G.
,
Lee
P. C. Y.
,
1977
.
On the theorems for local volume averaging of multiphase system
.
Int. J. Multiphase Flow
, vol.
12
, pp.
401
–
410
.
14.
Patankar, S.V., 1980, “Numerical Heat Transfer and Fluid Flow,” Hemisphere, New York.
15.
Launder
B. E.
&
Spalding
D. B.
,
1974
,
The Numerical Computation of Turbulent Flows
,
Comp. Meth. Appl. Mech. Eng.
, vol.
3
, pp.
269
–
289
16.
Silva, R.A., de Lemos, M.J.S., 2003, “Numerical Treatment of the Stress Jump Interface Condition for Laminar Flow in a Channel Containing a Porous Layer,” Numerical Heat Transfer — Part A.
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