Numerical modeling of turbulence mixed convection heat transfer in air filled enclosures by finite volume method
DOI:
https://doi.org/10.1260/1750-9548.5.4.307Abstract
In the present study, first the turbulent natural convection and then laminar mixed convection of air flow was solved in a room and the calculated outcomes are compared with results of other scientists and after showing validation of calculations, aforementioned flow is solved as a turbulent mixed convection flow, using the valid turbulence models Standard k-ε, RNG k-ε and RSM.
To solve governing differential equations for this flow, finite volume method was used. This method is a specific case of residual weighting method. The results show that at high Richardson Numbers, the flow is rather stationary at the center of the enclosure. Moreover, it is distinguished that when Richardson Number increases the maximum of local Nusselt decreases. Therefore, it can be said that less number of Richardson Number, more rate of heat transfer.
References
Bejan A., Convection heat transfer, A Wiley-Interscience publication, John Wiley, New York, 2004.
Rahman M. M., Alim M. A., Mamun M. A. H. and et al., Numerical Study of Opposing Mixed Convection in a Vented Enclosure, ARPN Journal of Engineering and Applied Sciences, 2007, Vol. 2, 25-35.
Saha S., M. Ali and et al., Combined Free and Forced Convection inside a Two-Dimensional Multiple Ventilated Rectangular Enclosure, ARPN Journal of Engineering and Applied Sciences, 2006, Vol. 1, 23-35.
Saha S., Mamun A. H., Hossain M. Z. and et al., Mixed Convection in an Enclosure with Different Inlet and Exit Configurations, Journal of Applied Fluid Mechanics, 2008, Vol. 1, 78-93. https://doi.org/10.36884/jafm.1.01.11840
Ghasemi B. and Aminossadati S. M., Natural Convection Heat Transfer in an Inclined Enclosure Filled with a Water-CuO Nanofluid, Numerical Heat Transfer: Part A, 2009, Vol. 55, 807-823. https://doi.org/10.1080/10407780902864623
Basak T., Roy S., Sharma P. K. and et al., Analysis of Mixed Convection Flows within a Square Cavity with Uniform and Non-Uniform Heating of Bottom Wall, International Journal of Thermal Sciences, 2009, Vol. 48(5), 891-912. https://doi.org/10.1016/j.ijthermalsci.2008.08.003
Khanafer K. M., Al-Amiri A. M. and Pop I., Numerical Simulation of Unsteady Mixed Convection in a Driven Cavity Using an Externally Excited Sliding Lid, European Journal of Mechanics B: Fluids, 2007, Vol. 26, 669-687. https://doi.org/10.1016/j.euromechflu.2006.06.006
Goshayeshi H. R. and Safaei M. R., Investigation of turbulence mixed convection in air-filled enclosures, Journal of Chemical Engineering and Materials Science, 2011, Vol. 2(6), 87-95.
Bessaih R. and Kadja M., Turbulent natural convection cooling of electronic components mounted on a vertical channel, Applied Thermal Engineering, 2000, Vol. 20, 141-154. https://doi.org/10.1016/s1359-4311(99)00010-1
Ampofo F., Turbulent natural convection in an air filled partitioned square cavity, International Journal of Heat and Fluid Flow, 2004, Vol. 25, 103-114. https://doi.org/10.1016/j.ijheatfluidflow.2003.10.004
Salat J., Xin S., Joubert P. and et al., Experimental and numerical investigation of turbulent natural convection in a large air-filled cavity, International Journal of Heat and Fluid Flow, 2004, Vol. 25, 824-832. https://doi.org/10.1016/j.ijheatfluidflow.2004.04.003
Xaman J., Alvarez G., Lira L. and et al., Numerical study of heat transfer by laminar and turbulent natural convection in tall cavities of facade elements, Energy and Buildings, 2005, Vol. 37, 787-794. https://doi.org/10.1016/j.enbuild.2004.11.001
Aounallah M., Addad Y., Benhamadouche S. and et al., Numerical investigation of turbulent natural convection in an inclined square cavity with a hot wavy wall, International Journal of Heat and Mass Transfer, 2007, Vol. 50, 1683-1693. https://doi.org/10.1016/j.ijheatmasstransfer.2006.10.015
Tian Y. S. and Karayiannis T. G., Low Turbulence Natural Convection in an Air Filled Square Cavity, International Journal of Heat and Mass Transfer, 2000, Vol. 43, 849-866. https://doi.org/10.1016/s0017-9310(99)00199-4
Ampofo, F. and Karayiannis, T. G., Experimental benchmark data for turbulent natural convection in an air filled square cavity, International Journal of Heat and Mass Transfer, 2003, Vol. 46, 3551-3572. https://doi.org/10.1016/s0017-9310(03)00147-9
Peng S. H. and Davidson L., Large Eddy Simulation for Turbulent Buoyant Flow in a confined cavity, International Journal of Heat and Fluid Flow, 2001, Vol. 22, 323-331. https://doi.org/10.1016/s0142-727x(01)00095-9
Omri M. and Galanis Ni., Numerical analysis of turbulent buoyant flows in enclosures: Influence of grid and boundary conditions, International Journal of Thermal Sciences, 2007, Vol. 46, 727-738. https://doi.org/10.1016/j.ijthermalsci.2006.10.006
Hsieh K. J. and Lien F. S., Numerical Modeling of Buoyancy-Driven Turbulent Flows Enclosures, International Journal of Heat and Fluid Flow, 2004, Vol. 25, 659-670. https://doi.org/10.1016/j.ijheatfluidflow.2003.11.023
Betts P. L. and Bokhari I. H., Experiments On Turbulent Natural Convection In An Enclosed Tall Cavity, International Journal of Heat and Fluid Flow, 2000, Vol. 21, 675-683. https://doi.org/10.1016/s0142-727x(00)00033-3
Safaei, M. R., The Study of Laminar and Turbulence Mixed Convection Heat Transfer in Newtonian and Non-Newtonian Fluids inside Rectangular Enclosures in Different Ri Numbers, M. Sc. thesis, Azad University-Mashhad Branch, Iran, 2009 (in Farsi Language). https://doi.org/10.5897/ijps11.1092
Patankar S. V., Numerical Heat Transfer and Fluid Flow, Hemisphere Washington, 1980.
Goshayeshi H. R., Safaei M. R. and Maghmoomi Y., Numerical Simulation of Unsteady Turbulent and Laminar Mixed Convection in Rectangular Enclosure with Hot upper Moving Wall by Finite Volume Method, The 6th International Chemical Engineering Congress and Exhibition (IChEC 2009), Kish Island, Iran, 2009.
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