The optimization of inlet and outlet port locations of a vented square cavity

Document Type : Full Lenght Research Article

Authors

1 Islamic azad university Mahdishahr branch, Department of engineering, Mahdishahr, Iran.

2 Department of mechanical engineering, Semnan University, Semnan, Iran

3 Department of mechanical engineering, Shahrood University of Technology, Shahrood, Iran

Abstract

In this study, mixed convection heat transfer and local and global entropy generation in a
ventilated square cavity have been investigated numerically. The natural convection effect is
achieved by a constant heat flux imposed at the bottom wall and cooled by injecting a cold
follow. In order to investigate the effect of port location, four different placement
configurations of the inlet and outlet ports are studied. In each case, external flow enters into
the cavity through an inlet port in the left side of the cavity and exits from the opposite side.
The other boundaries are assumed adiabatic. The cavity is subjected to laminar flow of water.
The investigation has been carried out for the Re=1000, and the Richardson number with the
range of 0.0001(Global Entropy Generation), Heat Transfer Irreversibility (HTI) and Fluid Friction
Irreversibility (FFI) are calculated and compared. Then, the optimum inlet/outlet configuration
has been selected based on the minimum GEG and the maximum heat transfer.

Keywords

References

[1].    K.J. Kennedy, A. Zebib, Combined free and forced convection between horizontal parallel planes: some case studies, Int. J. Heat Mass Transf., 26, 471–474 (1983).
[2].    T. Basak, S. Roy, P.K. Sharma, I. Pop, Analysis of mixed convection flows within a square cavity with uniform and non-uniform heating of bottom wall, Int. J. Therm. Sci., 48, 891–912 (2009).
[3].    G. Guo, M.A.R. Sharif, Mixed convection in rectangular cavities at various aspect ratios with moving isothermal sidewalls and constant flux heat source on the bottom wall, Int. J. Therm. Sci., 43, 465–475 (2004).
[4].    K.M. Khanafer, A.M. Al-Amiri, I. Pop, Numerical simulation of unsteady mixed convection in a driven cavity using an externally excited sliding lid, Eur. J. Mech. B/Fluids, 26, 669–687 (2007).
[5].    S. Saha, G. Saha, M. Ali, Md.Q. Islam, Combined free and forced convection inside a two-dimensional multiple ventilated rectangular enclosure, ARPN J. Eng. Appl. Sci., 1 (3), 23–35 (2006).
[6].    M.D.M. Rahman, M.A. Alim, S. Saha, M.K. Chowdhury, A numerical study of mixed convection in a square cavity with a heat conducting square cylinder at different locations, J. Mech. Eng., ME39 (2), 78–85 (2008).
[7].    B. Ghasemi, S.M. Aminossadati, Numerical simulation of mixed convection in a rectangular enclosure with different numbers and arrangements of discrete heat sources, Arab. J. Sci. Eng., 33 (1B), 189–207 (2008).
[8].    S. Saha, G. Saha, M. Ali, Md.Q. Islam, Combined free and forced convection inside a two-dimensional multiple ventilated rectangular enclosure, ARPN J. Eng. Appl. Sci., 2 (2), 25–36 (2007).
[9].     A. H. Mahmoudi, M. Shahi, F. Talebi, Effect of inlet and outlet location on the mixed convective cooling inside the ventilated cavity subjected to an external nanofluid, Int. Comm. Heat Mass Transfer, 37, 1158-1173 (2010).
[10].  A. Bejan, A study of entropy generation in fundamental convective heat transfer, J. Heat Transfer, 101, 718-725 (1979).
[11].  A. Bejan, Second-law analysis in heat and thermal design, Adv. Heat Transfer, 15, 1-58 (1982).
[12]. A. Bejan, Entropy Generation Minimization, CRC press, Boca Raton, NY, (1996).
[13].  N. Kasagi, M. Nishimura, DNS of combined forced and natural convection in a vertical plane channel, Int. J. Heat Mass Transfer, 18, 88-99 (1997).
[14].  A.C. Baytas, Entropy generation for natural convection in an inclined porous cavity, Int. J. Heat Mass Transfer, 43, 4225-4232 (2000).
[15]. S. Mahmud, R. A. Fraser, The second-law analysis in fundamental convective heat transfer problem, Int.  J. Thermal Sciences, 42, 177-186 (2003).
[16].  A. Andreozzi, A. Auletta, O. Manca, Entropy generation in natural convection in a symmetrically and uniformly heated vertical channel, int. J. Heat Mass Transfer, 49, 3221-3228 (2006).
[17].  A.Omri, and S.B.  Nasrallah, Control volume finite element numerical simulation of mixed convection in an air-cooled cavity, Numerical Heat Transfer, Part A, 36, 615-637 (1999).
[18].  S. Singh, and M.A.R.  Sharif, Mixed Convection cooling of a rectangular cavity with inlet and exit openings ondifferentially heated side walls. Numerical Heat Transfer, Part A, 44, 233-253(2003).
[19]. Md. Mustafizur Rahman, M. A. Alim and Sumon Saha, mixed convection in a square cavity with a heat-conducting horizontal square cylinder, Suranaree J. Sci. Technol., 17,139-153 (2010).
[20].  C. Balaji, M. Holling, H. Herwing, Entropy generation minimization in turbulent mixed convection flows, Int. Comm. Heat Mass Transfer, 34, 544-552 (2007).
[21]. I. Zahmatkesh, on the importance of thermal boundary conditions in heat transfer and entropy generation for natural convection inside a porous enclosure, Int.  J. Thermal Sciences, 47, 339-346 (2008).
[22]. M. shahi, A.H. Mahmoudi,  A. Honarbakhsh Rauof,  entropy generation due to a natural convection cooling of nanofluid, Int Comm. Heat Mass Transfer, 38, 972-983 (2011).
[23]. A. H. Mahmoudi,  I. Pop,  M. Shahi,  F. Talebi, MHD natural convection and entropy generation in a trapezoidal enclosure using nanofluid, computer and fluids, 72, 46-62 (2013).
[24]. J.H. Ferziger, M. Peric, Computational Method for Fluid Dynamic, Springer-Verlag, NY, (1999).
[25].  S.V. Patankar, Numerical heat transfer and fluid flow, hemisphere, NY, (1980).
[26]. G. De Vahl Davis, Natural convection of air in a square cavity a bench mark numerical solution, Int. J. Numer. Meth. Fluids, 3, 249–264 (1983).

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History

  • Receive Date: 20 July 2013
  • Revise Date: 20 January 2014
  • Accept Date: 02 March 2014

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