A numerical study of natural convection in a square enclosure with a circular cylinder at different vertical locations

Numerical calculations are carried out for natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder. A two-dimensional solution for unsteady natural convection is obtained, using the immersed boundary method (IBM) to model an inne...

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Vydáno v:International journal of heat and mass transfer Ročník 51; číslo 7-8; s. 1888 - 1906
Hlavní autoři: Kim, B.S., Lee, D.S., Ha, M.Y., Yoon, H.S.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Elsevier 01.04.2008
Témata:
Computational methods in fluid dynamics
Convection and heat transfer
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Turbulent flows, convection, and heat transfer
Temperature distribution
Streamlines
Nusselt number
Digital simulation
Boundary conditions
Natural convection
Immersed boundary method
Cavity flow
Finite volume methods
Circular cylinder
Modelling
Square section
Mesh generation
Heat transfer
ISSN:0017-9310
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Popis
Shrnutí:Numerical calculations are carried out for natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder. A two-dimensional solution for unsteady natural convection is obtained, using the immersed boundary method (IBM) to model an inner circular cylinder based on the finite volume method for different Rayleigh numbers varying over the range of 103-106. The study goes further to investigate the effect of the inner cylinder location on the heat transfer and fluid flow. The location of the inner circular cylinder is changed vertically along the center-line of square enclosure. The number, size and formation of the cell strongly depend on the Rayleigh number and the position of the inner circular cylinder. The changes in heat transfer quantities have also been presented.
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ISSN:0017-9310
DOI:10.1016/j.ijheatmasstransfer.2007.06.033