Abstract One prominent feature in the atmospheres of Jupiter and Saturn is appearance large-scale vortices (LSVs). However, mechanism that sustains these LSVs remains unclear. possible are driven by rotating convection. Here, we present numerical simulation results on a rapidly Rayleigh–Bénard convection at small Prandtl number Pr = 0.1 (close to turbulent numbers Saturn). We identified four fl...

We offer a unifying theory for turbulent purely internally heated convection, generalizing the theories of Grossmann and Lohse (2000, 2001) Rayleigh--B\'enard turbulence Shishkina, (2016) horizontal which are both based on splitting kinetic thermal dissipation rates in respective boundary bulk contributions. obtain mean temperature system Reynolds number (which response parameters) as function ...

In this paper we estimate the relative strengths of various terms of the Rayleigh-Bénard equations. Based on these estimates and scaling analysis, we derive a general formula for the large-scale velocity U or the Péclet number that is applicable for arbitrary Rayleigh number Ra and Prandtl number Pr. Our formula fits reasonably well with the earlier simulation and experimental results. Our anal...

We consider a cooperative wireless network comprised of a source, a destination and multiple relays operating in the presence of an eavesdropper, which attempts to tap the source-destination transmission. We propose multi-relay selection scheme for protecting the source against eavesdropping. More specifically, multi-relay selection allows multiple relays to simultaneously forward the source’s ...

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 ...