This paper presents computations for turbulent natural convection within an inclined cavity filled with a fluid saturated permeable medium. The finite volume method in a generalized coordinate system is applied. The inclined walls are maintained at constant but different temperatures, while the horizontal walls are kept insulated. Governing equations are written in terms of primitive variables and are recast into a general form. Flow and heat transfer characteristics are investigated for a wide range of values of Rayleigh number and inclined angles. The turbulent model used is the macroscopic k-eps model with a wall function. In this work, the turbulence model is first switched off and the laminar branch of the solution is found. Subsequently, the turbulence model is included so that the solution merges to the laminar branch for a reducing Ram. This convergence of results as Ram decreases can be seen as an estimate of the well known laminarization phenomenon. Present solutions are compared with published results and the influence of the inclination angle on Racr is analyzed. For Ram greater than around 104, both laminar and turbulent flow solutions deviate, indicating that such critical value for Ram was reached.
Skip Nav Destination
ASME 2007 International Mechanical Engineering Congress and Exposition
November 11–15, 2007
Seattle, Washington, USA
Conference Sponsors:
- ASME
ISBN:
0-7918-4302-5
PROCEEDINGS PAPER
Computation of Turbulent Free Convection in Oblique Porous Enclosures Using a Macroscopic Two-Equation Model Available to Purchase
Marcelo J. S. de Lemos,
Marcelo J. S. de Lemos
Instituto Tecnolo´gico de Aerona´utica-ITA, Sa˜o Jose´ dos Campos, SP, Brazil
Search for other works by this author on:
Edimilson J. Braga
Edimilson J. Braga
Instituto Tecnolo´gico de Aerona´utica-ITA, Sa˜o Jose´ dos Campos, SP, Brazil
Search for other works by this author on:
Marcelo J. S. de Lemos
Instituto Tecnolo´gico de Aerona´utica-ITA, Sa˜o Jose´ dos Campos, SP, Brazil
Edimilson J. Braga
Instituto Tecnolo´gico de Aerona´utica-ITA, Sa˜o Jose´ dos Campos, SP, Brazil
Paper No:
IMECE2007-43721, pp. 1499-1506; 8 pages
Published Online:
May 22, 2009
Citation
de Lemos, MJS, & Braga, EJ. "Computation of Turbulent Free Convection in Oblique Porous Enclosures Using a Macroscopic Two-Equation Model." Proceedings of the ASME 2007 International Mechanical Engineering Congress and Exposition. Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B. Seattle, Washington, USA. November 11–15, 2007. pp. 1499-1506. ASME. https://doi.org/10.1115/IMECE2007-43721
Download citation file:
11
Views
Related Proceedings Papers
Related Articles
Natural Convection in a Cavity With a Wavy Wall Heated From Below and Uniformly Cooled From the Top and Both Sides
J. Heat Transfer (July,2006)
Natural Convection in a Quadrantal Cavity Heated and Cooled on Adjacent Walls
J. Heat Transfer (May,2011)
A Numerical Simulation of Combined Radiation and Natural Convection in a Differential Heated Cubic Cavity
J. Heat Transfer (February,2010)
Related Chapters
Applications
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
Extended Surfaces
Thermal Management of Microelectronic Equipment
Extended Surfaces
Thermal Management of Microelectronic Equipment, Second Edition