Results 31 to 40 of about 9,868,888 (379)

The Effect of Vibrating Inner Cylinder on Natural Convective Heat Transfer in Concentric and Eccentric Horizontal Cylindrical Annuli [PDF]

Engineering and Technology Journal, 2023
In this study, natural heat convection caused by centric and vertically eccentric long horizontal cylinders under the influence of vibration is experimentally investigated.
Baydaa Khudhair, Adel Saleh, Ali Ekaid
doaj   +1 more source

Natural convection in a porous trapezoidal enclosure with magneto-hydrodynamic effect

Nonlinear Analysis, 2010
The effects of magnetic force, acting vertically downward on natural convection within a porous trapezoidal enclosure saturated with an electrically conducting fluid have been investigated numerically.
M. A. H. Mamun, Md. T. Islam, Md. M. Rahman   +2 more
doaj   +1 more source

Large Scale Structures in Rayleigh-Bénard Convection at High Rayleigh Numbers

Physical Review Letters, 2003
Direct numerical simulations of Rayleigh-Bénard convection in a plane layer with periodic boundary conditions at Rayleigh numbers up to 10(7) show that flow structures can be objectively classified as large or small scale structures because of a gap in spatial spectra. The typical size of the large scale structures does not always vary monotonically as
Hartlep, T., Tilgner, Andreas, Busse, Fritz H.   +2 more
openaire   +3 more sources

Marginal Stability of Oscillatory Bénard-Marangoni Convection With Internal Heat Generation

Journal of Computing Research and Innovation, 2023
The onset of oscillatory Benard-Marangoni convection in a horizontal fluid layer with internal heat generation and a deformable free surface is studied using an analytical technique employing the classical linear stability theory.
Mohamad Najib Mohamad Fadzil, Izleen Ibrahim   +1 more
doaj   +1 more source

A boundary-layer analysis of Rayleigh-Bénard convection at large Rayleigh number

Journal of Fluid Mechanics, 1987
A boundary-layer analysis is presented for the two-dimensional nonlinear convection of an infinite-Prandtl-number fluid in a rectangular enclosure, in the limit of large Rayleigh numbers. Particular emphasis is given to the analysis of the periodic boundary layers, and on the removal of the singularities that appear near the corners of the cell.
Jiménez Sendín, Javier, Zufiria, Juan A.   +1 more
openaire   +4 more sources

Effect of a polymer additive on heat transport in turbulent Rayleigh-B\'enard convection [PDF]

, 2009
Measurements of heat transport, as expressed by the Nusselt number $Nu$, are reported for turbulent Rayleigh-B\'enard convection of water containing up to 120 ppm by weight of poly-[ethylene oxide] with a molecular weight of $4\times10^6$ g/mole.
Alexei Nikolaenko, Guenter Ahlers, M. Rubinstein   +2 more
core   +1 more source

Plume structure in high-Rayleigh-number convection [PDF]

Journal of Fluid Mechanics, 2005
Near-wall structures in turbulent natural convection at Rayleigh numbers of $10^{10}$ to $10^{11}$ at A Schmidt number of 602 are visualized by a new method of driving the convection across a fine membrane using concentration differences of sodium chloride. The visualizations show the near-wall flow to consist of sheet plumes.
Puthenveettil, Baburaj A, Arakeri, Jaywant H   +1 more
openaire   +5 more sources

Penetrative convection at high Rayleigh numbers

Physical Review Fluids, 2018
We study penetrative convection of a fluid confined between two horizontal plates, the temperatures of which are such that a temperature of maximum density lies between them. The range of Rayleigh numbers studied is $Ra = \left[10^6, 10^8 \right]$ and the Prandtl numbers are $Pr = 1$ and $11.6$.
Toppaladoddi, S, Wettlaufer, J
openaire   +2 more sources

Electro-Hydrodynamic Convection in a Rotating Dielectric Micropolar Fluid Layer

International Journal of Applied Mechanics and Engineering, 2019
Thermal convection of a rotating dielectric micropolar fluid layer under the action of an electric field and temperature gradient has been investigated. The dispersion relation has been derived using normal mode analysis.
H. Kaur, G.N Verma
doaj   +1 more source

Variable Gravity Effects on Thermal Instability of Nanofluid in Anisotropic Porous Medium

International Journal of Applied Mechanics and Engineering, 2013
In this paper, we study the effects of variable gravity on thermal instability in a horizontal layer of a nanofluid in an anisotropic porous medium. Darcy model been used for the porous medium.
R. Chand, G.C. Rana, S. Kumar
doaj   +1 more source