Journal ArticleDOI
Effect of thick horizontal partial partition attached to one of the active walls of a differentially heated square cavity
A. Nag,A. Sarkar,V.M.K. Sastri +2 more
TLDR
In this paper, the effect of a partial horizontal partition plate of finite thickness attached to the heated vertical wall of a differentially heated square cavity has been studied numerically using the finite element method.Abstract:
The effect of a partial horizontal partition plate of finite thickness, attached to the heated vertical wall of a differentially heated square cavity, has been studied numerically using the finite element method. The partition thickness is varied from 0.5% of the height of the cavity to 10%. The partition is considered to be located at the middle of the hot wall of a width equivalent to 20% of the cavity width. It is observed that as the partition thickness is reduced, heat transfer across the cavity decreases at first, until a critical thickness of the partition plate is reached. Beyond this value, heat transfer increases as the thickness of the partition is further reduced. Streamline maps are found to be notably sensitive to the partition thickness. The effect of conductivity of the partition material on heat transfer is also studied. Except for material with poor thermal properties, conductivity of the partition is observed to have a negligible effect on heat transfer.read more
Citations
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Modelling of combined surface radiation and natural convection in a vented “T” form cavity
TL;DR: In this paper, a numerical study of heat transfer and fluid flow in a T-form cavity is carried out, where the cavity contains two symmetrically identical isothermal blocks and is vented by two opening located in a vertical median axis at the top and bottom parts of the cavity.
Journal ArticleDOI
Analysis of a Localized Fire in a 3-D Tunnel Using a Hybrid Solver: Lattice Boltzmann Method, Finite-Volume Method, and Fully Explicit Upwind Scheme
TL;DR: In this paper, a localized fire in a 3D tunnel is analyzed by solving a combined-mode natural-convection and radiation problem, where separate energy equations are used for the two species.
Journal ArticleDOI
Adiabatic partition effect on natural convection heat transfer inside a square cavity: experimental and numerical studies
Sajjad Mahmoudinezhad,Alireza Rezania,Tooraj Yousefi,Mostafa Safdari Shadloo,Lasse Rosendahl +4 more
TL;DR: In this paper, the effects of Rayleigh number on the heat transfer from the side-heated walls are investigated using a Mach-Zehnder interferometer and a finite volume code, respectively.
Journal ArticleDOI
Combined natural convection and surface radiation in solar collector equipped with partitions
TL;DR: In this article, a comprehensive numerical study was carried out to study the thermal performances of a solar collector equipped with partitions attached to its glass cover, where a specifically developed numerical model based on the finite-volume method and the SIMPLER algorithm was used for the solution of the mass, momentum and energy transfer governing equations.
Journal ArticleDOI
Temperature oscillations in a differentially heated cavity with and without a fin on the sidewall
TL;DR: In this paper, temperature measurements of the thermal flows in a differentially heated cavity with and without a fin on the sidewall were performed and the oscillatory behaviors in the transition from an initially isothermal state to an eventually stratified interior fluid ambient were characterized.
References
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Journal ArticleDOI
Natural convection of air in a square cavity: A bench mark numerical solution
TL;DR: In this paper, the authors used mesh refnement and extrapolation to obtain an accurate solution of the equations describing two-dimensional natural convection in a square cavity with differentially heated side walls.
Journal ArticleDOI
Natural convection in enclosures
TL;DR: In this paper, the complex nature of the natural convection phenomena in enclosures is discussed and the boundary value problem is formulated, assuming that the motion is 2D and steady, the fluid is incompressible and frictional heating is negligible, and the difference between the hot wall and cold wall temperatures is small relative to the absolute temperatures of the cold wall.
Journal ArticleDOI
Natural convection in a differentially heated square cavity with a horizontal partition plate on the hot wall
A. Nag,A. Sarkar,V.M.K. Sastri +2 more
Journal ArticleDOI
Natural convection heat transfer in enclosures with multiple vertical partitions
TL;DR: In this article, the boundary layer solution predicting the heat transfer rate is derived on the basis of the numerical results, and it is shown that the Nusselt number is inversely proportional (1 + N) where N is the number of partitions.
Journal ArticleDOI
Natural convection in a partially divided enclosure
Nienchuan N. Lin,Adrian Bejan +1 more
TL;DR: In this article, an experimental and analytical study of the phenomenon of heat transfer by natural convection in a rectangular enclosure fitted with an incomplete internal partition is presented. But the authors do not consider the effect of the aperture ratio h/H on both the heat transfer rate and flow pattern.