Numerical study of three-dimensional natural convection in a cubical cavity at high Rayleigh numbers
نویسندگان
چکیده
منابع مشابه
Numerical study of fins arrangement and nanofluids effects on three-dimensional natural convection in the cubical enclosure
This investigation is a three dimensional comprehensive heat transfer analysis for partially differentially heated enclosure with the vertical fin mounted on the hot wall. The thermal lattice Boltzmann based on D3Q19 method is utilized to illustrate the effects of vertical fins and nanoparticles on the flow and thermal fields. The effects of Rayleigh number and different arrangement of fins on ...
متن کاملHigh Rayleigh number convection in a three-dimensional porous medium
High-resolution numerical simulations of statistically steady convection in a threedimensional porous medium are presented for Rayleigh numbers Ra 6 2 × 104. Measurements of the Nusselt number Nu in the range 1750 6 Ra 6 2× 104 are well fitted by a relationship of the form Nu= α3Ra+ β3, for α3= 9.6× 10−3 and β3= 4.6. This fit indicates that the classical linear scaling Nu∼ Ra is attained, and t...
متن کاملExperimental study of non-Boussinesq Rayleigh–Bénard convection at high Rayleigh and Prandtl numbers
A set of experiments is performed, in which a layer of fluid is heated from below and cooled from above, in order to study convection at high Rayleigh numbers ~Ra! and Prandtl numbers ~Pr!. The working fluid, corn syrup, has a viscosity that depends strongly on temperature. Viscosity within the fluid layer varies by a factor of 6 to 1.8310 in the various experiments. A total of 28 experiments a...
متن کاملTurbulent convection at high Rayleigh numbers and aspect ratio 4
We report measurements of the Nusselt number, Nu, in turbulent thermal convection in a cylindrical container of aspect ratio 4. The highest Rayleigh number achieved was Ra=2× 10. Except for the last half a decade or so of Ra, experimental conditions obey the Boussinesq approximation accurately. For these conditions, the data show that the logNu–logRa slope saturates at a value close to 1/3, as ...
متن کاملNumerical Study of Natural Convection in a Square Cavity Filled with a Porous Medium Saturated with Nanofluid
Steady state natural convection of Al2O3-water nanofluid inside a square cavity filled with a porous medium is investigated numerically. The temperatures of the two side walls of the cavity are maintained at TH and TC, where TC has been considered as the reference condition. The top and the bottom horizontal walls have been considered to be insulated i.e., non-conducting and impermeable to mass...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2017
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2017.05.057