Experimental and numerical results of heat transfer by mixed convection in a ventilated cavity are presented. The results were obtained for a 1.0 m × 1.0 m × 1.0 m cavity. The inlet and outlet dimensions were of 0.08 m × 0.08 m, and the air velocity at the inlet was set to 0.1 and 0.5 m/s. The left wall receives a uniform and constant heat flux whereas the right wall was maintained at a constant temperature. Experimental and numerical results of temperature profiles and heat transfer coefficients are presented and compared. The results showed that the variation of the Rayleigh number increases about 1% the percentage differences between experimental and numerical values, and the maximum percentage differences on heat transfer coefficients are 2.0% for Ra = 2.7 × 108 and 3.0% for Ra = 4.5 × 108.
Issue Section:
Technical Brief
References
1.
Dzioubinski
, R. C. O.
, 1999
, “Trends in Consumption and Production: Household Energy Consumption
,” DESA Discussion Paper No. 6.2.
Costa
, J.
, Oliveira
, L.
, and Blay
, D.
, 1999
, “Test of Several Versions for the k–ε Type Turbulence Modelling of Internal Mixed Convection Flows
,” Int. J. Heat Mass Transfer
, 42
(23
), pp. 4391
–4409
.10.1016/S0017-9310(99)00075-73.
Costa
, J.
, Oliveira
, L.
, and Blay
, D.
, 2000
, “Turbulent Airflow in a Room With a Two-Jet Heating Ventilation System-A Numerical Parametric Study
,” Energy Build.
, 32
(3
), pp. 327
–343
.10.1016/S0378-7788(00)00056-64.
Raji
, A.
, and Hasnaoui
, M.
, 2001
, “Combined Mixed Convection and Radiation in Ventilated Cavities
,” Eng. Comput.
, 18
(7
), pp. 922
–949
.10.1108/EUM00000000062125.
Singh
, S.
, and Sharif
, M. A. R.
, 2003
, “Mixed Convective Cooling of a Rectangular Cavity With Inlet and Exit Openings on Differentially Heated Side Walls
,” Numer. Heat Transfer, Part A
, 44
(3
), pp. 233
–253
.10.1080/7161005096.
Posner
, J.
, 2003
, “Measurement and Prediction of Indoor Air Flow in a Model Room
,” Energy Build.
, 35
(5
), pp. 515
–526
.10.1016/S0378-7788(02)00163-97.
Moraga
, N. O.
, and Lopez
, S. E.
, 2004
, “Numerical Simulation of Three-Dimensional Mixed Convection in an Air-Cooled Cavity
,” Numer. Heat Transfer, Part A
, 45
(8
), pp. 811
–824
.10.1080/104077804902504098.
Haslavsky
, V.
, Tanny
, J.
, and Teitel
, M.
, 2006
, “Interaction Between the Mixing and Displacement Modes in a Naturally Ventilated Enclosure
,” Build. Environ.
, 41
(12
), pp. 1755
–1761
.10.1016/j.buildenv.2005.07.0139.
Rahman
, M.
, Alim
, M.
, Mamun
, M.
, Chowdhury
, M.
, and Islam
, A.
, 2007
, “Numerical Study of Opposing Mixed Convection in a Vented Enclosure
,” ARPN J. Eng. Appl. Sci.
, 2
(2
), pp. 25
–36
.10.
Daghigh
, R.
, Adam
, N.
, Sahari
, B.
, Sopian
, K.
, and Alghoul
, M.
, 2008
, “Influences of Air Exchange Effectiveness and Its Rate on Thermal Comfort: Naturally Ventilated Office
,” J. Build. Phys.
, 32
(2
), pp. 175
–194
.10.1177/174425910809733311.
Raji
, A.
, Hasnaoui
, M.
, and Bahlaoui
, A.
, 2008
, “Numerical Study of Natural Convection Dominated Heat Transfer in a Ventilated Cavity Case of Force Flow Playing Simultaneous Assisting and Opposing Roles
,” Int. J. Heat Fluid Flow
, 29
(4
), pp. 1174
–1181
.10.1016/j.ijheatfluidflow.2008.01.01012.
Saha
, S.
, Mamun
, A.
, Hossain
, Z.
, and Islam
, S.
, 2008
, “Mixed Convection in an Enclosure With Different Inlet and Exit Configurations
,” J. Appl. Fluid Mech.
, 1
(1
), pp. 78
–93
.13.
Tanny
, J.
, Haslavsky
, V.
, and Teitel
, M.
, 2008
, “Airflow and Heat Flux Through the Vertical Opening of Buoyancy-Induced Naturally Ventilated Enclosures
,” Energy Build.
, 40
(4
), pp. 637
–646
.10.1016/j.enbuild.2007.04.02014.
Lariani
, A.
, Nesreddine
, H.
, and Galanis
, N.
, 2009
, “Numerical and Experimental Study of 3D Turbulent Airflow in a Full Scale Heated Ventilated Room
,” Eng. Appl. Comput. Fluid Mech.
, 3
(1
), pp. 1
–14
.10.1080/19942060.2009.1101525015.
Xamán
, J.
, Tun
, J.
, Álvarez
, G.
, Chavez
, Y.
, and Noh
, F.
, 2009
, “Optimum Ventilation Based on the Overall Ventilation Effectiveness for Temperature Distribution in Ventilated Cavities
,” Int. J. Therm. Sci.
, 48
(8
), pp. 1574
–1585
.10.1016/j.ijthermalsci.2008.12.00816.
Karava
, P.
, Stathopoulos
, T.
, and Athienitis
, A.
, 2011
, “Airflow Assessment in Cross-Ventilated Buildings With Operable Facade Elements
,” Build. Environ.
, 46
(1
), pp. 266
–279
.10.1016/j.buildenv.2010.07.02217.
Menchaca-Brandan
, M. A.
, and Glicksman
, L. R.
, 2011
, “The Importance for Radiative Heat Transfer in Room Airflow Simulations
,” Proceedings of the 12th International Conference on Air Distribution in Rooms
, Trondheim, Norway
, pp. 1115
–1123
.18.
Leenknegt
, S.
, Wagemakersb
, R.
, Bosschaertsb
, W.
, and Saelensa
, D.
, 2012
, “Numerical Sensitivity Study of Transient Surface Convection During Night Cooling
,” Energy Build.
, 53
(1), pp. 85
–95
.10.1016/j.enbuild.2012.06.02019.
Serrano-Arellano
, J.
, Xamán
, J.
, and Álvarez
, G.
, 2013
, “Optimum Ventilation Based on the Ventilation Effectiveness for Temperature and CO2 Distribution in Ventilated Cavities
,” Int. J. Heat Mass Transfer
, 62
(1), pp. 9
–21
.10.1016/j.ijheatmasstransfer.2013.02.05120.
Rodriguez-Muñoz
, N. A.
, Briceño-Ahumada
, Z. C.
, and Hinojosa-Palafox
, J. F.
, 2013
, “Numerical Study of Heat Transfer by Convection and Thermal Radiation in a Ventilated Room With Human Heat Generation and CO2 Production
,” Lat. Am. Appl. Res.
, 43
(4), pp. 353
–361
.21.
Rodriguez
, N. A.
, and Hinojosa
, J. F.
, 2014
, “Numerical Study of Airflow and Heat Transfer in an Air-Cooled Room With Different Inlet Positions
,” J. Build. Phys.
, 37
(3
), pp. 246
–268
.10.1177/174425911246210622.
Ince
, N.
, and Launder
, B.
, 1989
, “On the Computation of Buoyancy Driven Turbulent Flows in Rectangular Enclosures
,” Int. J. Heat Fluid Flow
, 10
(2
), pp. 110
–117
.10.1016/0142-727X(89)90003-923.
Nielsen
, P.
, 1990
, “Energy Conservation in Building and Community System
,” Specification of a Two Dimensional Test Case
, Annex 20, Vol. 20
, Institut for Bygningsteknik, Aalborg Universitet, Alborg, Denmark.24.
Patankar
, S.
, 1980
, Numerical Heat Transfer and Fluid Flow
, Hemisphere Publishing
, Washington, DC
.25.
Holman
, J. P.
, 1994
, Experimental Methods for Engineers
, 6th ed., McGraw-Hill
, New York
.Copyright © 2015 by ASME
You do not currently have access to this content.
