Ultimate Rayleigh-Bénard turbulence

D Lohse, O Shishkina - Reviews of modern physics, 2024 - APS
Thermally driven turbulent flows are omnipresent in nature and technology. A good
understanding of the physical principles governing such flows is key for numerous problems …

Heat transfer and large scale dynamics in turbulent Rayleigh-Bénard convection

G Ahlers, S Grossmann, D Lohse - Reviews of modern physics, 2009 - APS
The progress in our understanding of several aspects of turbulent Rayleigh-Bénard
convection is reviewed. The focus is on the question of how the Nusselt number and the …

Small-scale properties of turbulent Rayleigh-Bénard convection

D Lohse, KQ **a - Annual review of fluid mechanics, 2010 - annualreviews.org
The properties of the structure functions and other small-scale quantities in turbulent
Rayleigh-Bénard convection are reviewed, from an experimental, theoretical, and numerical …

Boundary layer structure in turbulent thermal convection and its consequences for the required numerical resolution

O Shishkina, RJAM Stevens, S Grossmann… - New journal of …, 2010 - iopscience.iop.org
Abstract Results on the Prandtl–Blasius-type kinetic and thermal boundary layer (BL)
thicknesses in turbulent Rayleigh–Bénard (RB) convection in a broad range of Prandtl …

Multiple scaling in the ultimate regime of thermal convection

S Grossmann, D Lohse - Physics of fluids, 2011 - pubs.aip.org
Very different types of scaling of the Nusselt number Nu with the Rayleigh number Ra have
experimentally been found in the very large Ra regime beyond 10 11⁠. We understand and …

[หนังสือ][B] Physics of buoyant flows: from instabilities to turbulence

MK Verma - 2018 - World Scientific
Hydrodynamic flows exhibit turbulent behaviour which is not well understood till date. When
a fluid is in a gravitational field, the flow becomes even more complex due to the gravity …

Roughness-Facilitated Local Scaling Does Not Imply the Onset of the Ultimate Regime of Thermal Convection

X Zhu, RJAM Stevens, R Verzicco, D Lohse - Physical review letters, 2017 - APS
In thermal convection, roughness is often used as a means to enhance heat transport,
expressed in Nusselt number. Yet there is no consensus on whether the Nusselt vs Rayleigh …

Statistics of kinetic and thermal energy dissipation rates in two-dimensional turbulent Rayleigh–Bénard convection

Y Zhang, Q Zhou, C Sun - Journal of Fluid Mechanics, 2017 - cambridge.org
We investigate the statistical properties of the kinetic is found to be plume dominated.
Moreover, the boundary-layer/plume contributions scale as those predicted by the GL …

Scaling enabled by multiscale wall roughness in Rayleigh–Bénard turbulence

X Zhu, RJAM Stevens, O Shishkina… - Journal of Fluid …, 2019 - cambridge.org
In turbulent Rayleigh–Bénard (RB) convection with regular, mono-scale, surface roughness,
the scaling exponent, when the smaller roughness elements fully protrude through the …

Vertical natural convection: application of the unifying theory of thermal convection

CS Ng, A Ooi, D Lohse, D Chung - Journal of Fluid Mechanics, 2015 - cambridge.org
Results from direct numerical simulations of vertical natural convection at Rayleigh numbers-
power of a wind-based Reynolds number, where the 'wind'of the GL theory is interpreted as …