Turbulent thermal convection in an enclosure with internal heat generation

Journal Article · Sun Jan 31 23:00:00 EST 1988 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3250442· OSTI ID:6106451

Farouk, B ^[1]

---

1. Drexel Univ., Philadelphia, PA (United States)

Numerical results are presented for turbulent thermal convection, driven by uniform volumetric energy sources for two-dimensional flows in a rectangular enclosure. Rigid adiabatic sides and a rigid isothermal upper surface are considered. For the rigid bottom surface, zero heat flux boundary conditions are used. Computations are carried out for Prandtl number = 6.5 and Rayleigh number (based on enclosure depth L) range of 10{sup 6} to 10{sup 10}. The aspect ratio (L/X) of the enclosure was maintained at 0.5 for all cases. The turbulence model used in this study is a k-{epsilon} model, which characterizes turbulence through the kinetic energy and its volumetric rate of dissipation. Buoyancy effects on the turbulence structure are accounted for. Results show the transition from well-ordered multicellular flow to fully turbulent flow within the enclosure as the Rayleigh number increases.

• OSTI ID: 6106451
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 110:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CAVITIES
CONVECTION
DATA
ENERGY TRANSFER
EQUILIBRIUM
FLUID FLOW
HEAT TRANSFER
INFORMATION
MASS TRANSFER
NATURAL CONVECTION
STRATIFICATION
THERMAL EQUILIBRIUM
TURBULENT FLOW