An experimental investigation was carried out to determine the heat transfer coefficient from a rectangular tilted cavity to the ambient due to the buoyancy driven flow in the cavity. The cavity is partially or fully open from one side. All the walls of the cavity are adiabatic except the wall facing the cavity opening which is heated at a constant heat flux. Air was used as the cavity fluid and the experiments were carried out at a flux Grashof number of 5.5 × 108. The tilt angle of the cavity, measured from the vertical direction, was changed between −90 deg to +90 deg in 15 deg increments. Also, geometries of aspect ratio (height-to-width of cavity) of 1.0, 0.5, and 0.25 and of opening ratio (opening height to cavity height) of 1.0, 0.5, and 0.25 were considered in the study. The results are presented in terms of the average Nusselt number for different values of the above experimental parameters. Conclusions are derived for the effect of changing the tilt angle, the aspect ratio, or the opening ratio of the cavity on the average heat transfer coefficient between the cavity and the ambient air.

1.
Angirasa
D.
,
Pourquie
M. J. B. M.
, and
Nieuwstadt
F. T. M.
,
1992
, “
Numerical Study of Transient and Steady Laminar Buoyancy-Driven Flows and Heat Transfer in a Square Open Cavity
,”
Numerical Heat Transfer
, Part A, Vol.
22
, pp.
223
239
.
2.
ASME, 1986, Measurement Uncertainty, ASNI/ASME PTC 19.1-1985, Part 1.
3.
Chan
Y. L.
, and
Tien
C. L.
,
1985
, “
A Numerical Study of Two-Dimensional Laminar Convection in Shallow Open Cavities
,”
Int. J. Heat Mass Transfer
, Vol.
28
, pp.
603
612
.
4.
Chan
Y. L.
, and
Tien
C. L.
,
1986
, “
Laminar Natural Convection in Shallow Open Cavities
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
108
, pp.
305
309
.
5.
Coleman, H. W., and Steele, W. G., 1989, Experimental and Uncertainty Analysis for Engineers, John Wiley and Sons, New York.
1.
Gross
Spindler, U., R.
, and
Hahne
E.
,
1981
, “
Shape-Factor Equations for Radiation Heat Transfer Between Plane Rectangular Boundaries
,”
Letters in Heat Transfer
, Vol.
8
, pp.
219
227
;
2.
Reported in J. R. Howell, 1982, a Catalog of Radiation Configuration Factor, McGraw-Hill, New York, p. 97.
1.
Hess
C. F.
, and
Henze
R. H.
,
1984
, “
Experimental Investigation of Natural Convection Losses From Open Cavities
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
106
, pp.
333
338
.
2.
Le Quere
P.
,
Humphrey
J. A. C.
, and
Sherman
F. S.
,
1981
, “
Numerical Calculation of Thermally Driven Two-Dimensional Unsteady Laminar Flow in Cavities of Rectangular Cross Section
,”
Numerical Heat Transfer
, Vol.
4
, pp.
249
283
.
3.
Lin
C. X.
, and
Xin
M. D.
,
1992
, “
Transient Turbulent Free Convection in an Open Cavity
,”
Institution of Chemical Engineers Symposium Series
, Vol.
1
, pp.
515
521
.
4.
Miyamoto
M.
,
Keuhn
T. H.
,
Goldstein
R. J.
, and
Katoh
Y.
,
1989
, “
Two-Dimensional Laminar Natural Convection Heat Transfer from a Fully or Partially Open Square Cavity
,”
Numerical Heat Transfer
, Part A, Vol.
15
, pp.
411
430
.
5.
Penot
F.
,
1982
, “
Numerical Calculation of Two-Dimensional Natural Convection in Isothermal Open Cavities
,”
Numerical Heat Transfer
, Vol.
5
, pp.
421
437
.
6.
Sernas, V., and Kyriakides, I., 1982, “Natural Convection in an Open Cavity,” Proceedings of the Seventh International Heat Transfer Conference, Munchen, Germany, Vol. 2, pp. 275–280.
7.
Showole
R. A.
, and
Tarasuk
J. D.
,
1993
, “
Experimental and Numerical Studies of Natural Convection with Flow Separation in Upward-Facing Inclined Open Cavities
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
115
, pp.
592
605
.
This content is only available via PDF.
You do not currently have access to this content.