Convective Heat Transfer Enhancement in an Enclosure with Fin Utilizing Nano Fluids
The objective of the present work is to conduct
investigations leading to a more complete explanation of single phase
natural convective heat transfer in an enclosure with fin utilizing
nano fluids. The nano fluid used, which is composed of Aluminum
oxide nano particles in suspension of Ethylene glycol, is provided at
various volume fractions. The study is carried out numerically for a
range of Rayleigh numbers, fin heights and aspect ratio. The flow and
temperature distributions are taken to be two-dimensional. Regions
with the same velocity and temperature distributions are identified as
symmetry of sections. One half of such a rectangular region is chosen
as the computational domain taking into account the symmetry about
the fin. Transport equations are modeled by a stream functionvorticity
formulation and are solved numerically by finite-difference
schemes. Comparisons with previously published works on the basis
of special cases are done. Results are presented in the form of
streamline, vector and isotherm plots as well as the variation of local
Nusselt number along the fin under different conditions.
[1] Acharya,S., Goldstein,R,J., 1985, "Natural convection in an externally
heated vertical or inclined square box containing internal energy
sources", J. Heat Transfer, 107, pp.855-866.
[2] Acharya,S., Jetli,R., 1990, "Heat transfer due to buoyancy in a partially
divided square box," Int. J. Heat Mass Transfer, 33 (5), pp.931-942.
[3] Scozia,R., Frederick,R,L., 1991, "Natural convection in slender cavities
with multiple fins attached on an active wall", Numer. Heat Transfer A,
20, pp.127-158.
[4] Facas,G,N.,1993, "Natural convection in a cavity with fins attached to
both vertical walls", J. Thermophys. Heat Transfer, 7 (4), pp.555-560.
[5] Lakhal,E,K., Hasnaoui,M., Bilgen,E., Vasseur,P.,1997, "Natural
convection in inclined rectangular enclosures with perfectly conducting
fins attached on the heated wall", Heat Mass Transfer, 32 (5), pp.365-
373.
[6] Keblinski, P., Phillpot,S,R., Choi,S,U,S., Eastman,J,A., 2002,
"Mechanisms of heat flow in suspensions of nano-sized particles (nano
fluids)", Int. J. Heat Mass Transfer, 45, pp.855-863.
[7] Shi,X., Khodadadi,J,M., 2003, "Laminar natural convection heat
transfer in a differentially heated square cavity due to a thin fin on the
hot wall", ASME J. Heat Transfer, 125, pp. 624-634.
[8] Khanafer,K., Vafai,K and Lightstone,M., 2003, "Buoyancy-driven heat
transfer enhancement in a two-dimensional enclosure utilizing
nanofluids," Int. J. Heat Mass Transfer, 46, pp.3639-3653.
[9] Brinkman H.C, 1952, "The viscosity of concentrated suspensions and
solutions", J. Chem. Phys., 20, pp.571-581.
[10] Suhas V Patankar., 1980, Numerical heat transfer and fluid flow,
Hemisphere Publishing Corp, New York,
[11] de Vahl Davis,G., 1983, "Natural convection of air in a square cavity: a
bench mark numerical solution", Int. J. Numer. Meth. Fluids, 3,
pp.249-264.
[12] Robert W Hornbeck.,1973, Numerical marching techniques for fluid
flows with heat transfer, NASA, SP-297, Washington DC.
[13] Barakos,G., Mitsoulis,E., 1994, "Natural convection flow in a square
cavity revisited: laminar and turbulent models with wall functions," Int.
J. Numer. Meth. Fluids., 18, pp.695-719.
[1] Acharya,S., Goldstein,R,J., 1985, "Natural convection in an externally
heated vertical or inclined square box containing internal energy
sources", J. Heat Transfer, 107, pp.855-866.
[2] Acharya,S., Jetli,R., 1990, "Heat transfer due to buoyancy in a partially
divided square box," Int. J. Heat Mass Transfer, 33 (5), pp.931-942.
[3] Scozia,R., Frederick,R,L., 1991, "Natural convection in slender cavities
with multiple fins attached on an active wall", Numer. Heat Transfer A,
20, pp.127-158.
[4] Facas,G,N.,1993, "Natural convection in a cavity with fins attached to
both vertical walls", J. Thermophys. Heat Transfer, 7 (4), pp.555-560.
[5] Lakhal,E,K., Hasnaoui,M., Bilgen,E., Vasseur,P.,1997, "Natural
convection in inclined rectangular enclosures with perfectly conducting
fins attached on the heated wall", Heat Mass Transfer, 32 (5), pp.365-
373.
[6] Keblinski, P., Phillpot,S,R., Choi,S,U,S., Eastman,J,A., 2002,
"Mechanisms of heat flow in suspensions of nano-sized particles (nano
fluids)", Int. J. Heat Mass Transfer, 45, pp.855-863.
[7] Shi,X., Khodadadi,J,M., 2003, "Laminar natural convection heat
transfer in a differentially heated square cavity due to a thin fin on the
hot wall", ASME J. Heat Transfer, 125, pp. 624-634.
[8] Khanafer,K., Vafai,K and Lightstone,M., 2003, "Buoyancy-driven heat
transfer enhancement in a two-dimensional enclosure utilizing
nanofluids," Int. J. Heat Mass Transfer, 46, pp.3639-3653.
[9] Brinkman H.C, 1952, "The viscosity of concentrated suspensions and
solutions", J. Chem. Phys., 20, pp.571-581.
[10] Suhas V Patankar., 1980, Numerical heat transfer and fluid flow,
Hemisphere Publishing Corp, New York,
[11] de Vahl Davis,G., 1983, "Natural convection of air in a square cavity: a
bench mark numerical solution", Int. J. Numer. Meth. Fluids, 3,
pp.249-264.
[12] Robert W Hornbeck.,1973, Numerical marching techniques for fluid
flows with heat transfer, NASA, SP-297, Washington DC.
[13] Barakos,G., Mitsoulis,E., 1994, "Natural convection flow in a square
cavity revisited: laminar and turbulent models with wall functions," Int.
J. Numer. Meth. Fluids., 18, pp.695-719.
@article{"International Journal of Engineering, Mathematical and Physical Sciences:58166", author = "S. H. Anilkumar and Ghulam Jilani", title = "Convective Heat Transfer Enhancement in an Enclosure with Fin Utilizing Nano Fluids", abstract = "The objective of the present work is to conduct
investigations leading to a more complete explanation of single phase
natural convective heat transfer in an enclosure with fin utilizing
nano fluids. The nano fluid used, which is composed of Aluminum
oxide nano particles in suspension of Ethylene glycol, is provided at
various volume fractions. The study is carried out numerically for a
range of Rayleigh numbers, fin heights and aspect ratio. The flow and
temperature distributions are taken to be two-dimensional. Regions
with the same velocity and temperature distributions are identified as
symmetry of sections. One half of such a rectangular region is chosen
as the computational domain taking into account the symmetry about
the fin. Transport equations are modeled by a stream functionvorticity
formulation and are solved numerically by finite-difference
schemes. Comparisons with previously published works on the basis
of special cases are done. Results are presented in the form of
streamline, vector and isotherm plots as well as the variation of local
Nusselt number along the fin under different conditions.", keywords = "Fin height, Nano fluid, natural convection, Rayleigh
number.", volume = "2", number = "7", pages = "464-7", }