Ekman
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Related Articles from SNS
Baroclinic wave dynamics in the Ekman-free rotating rectangular annulus with localized forced plume
arXiv:2606.10386v1 Announce Type: new Abstract: We report numerical simulations of a rotating rectangular annulus that isolates the Ekman-free bulk of the cylindrical baroclinic annulus, subjected to bi-directional temperature gradients imposed by a uniformly cooled inner wall and a localized forced heated plume at the outer bottom. The finite-volume OpenFOAM solver is employed across combinations of source Richardson number $Ri_0 = 99, 4, 1$ and Rossby number $Ro = 0.3, 0.1, 0.07$. A...
Scale-dependent force balance governs transition to the geostrophic regime in liquid metal rotating convection
arXiv:2606.04995v1 Announce Type: new Abstract: Rotating convection in low-Prandtl-number liquid metal drives dynamo action in the Earth's outer core and is central to planetary interior dynamics. It has been proposed that flow regime transitions in rotating convection are controlled by competition between the thermal and Ekman boundary layers. However, through laboratory experiments and direct numerical simulations of rotating liquid-metal convection, we find that this mechanism breaks down...
Prandtl number dependence of rotating internally heated convection
Announce Type: replace Abstract: We investigate the influence of the Prandtl number ($Pr$) on penetrative internally heated convection (IHC) in both non-rotating and rotating regimes using three-dimensional direct numerical simulations. By varying $Pr$ between 0.1 and 100, we show that the global mean temperature $\langle \overline{T} \rangle$ is not very sensitive to $Pr$, and is primarily controlled by the dynamics of the unstably stratified top boundary layer. In contrast, the Prandtl...
Influence of Aspect ratio in the Convection in Rotating Annulus In the Presence of Localized Heating
arXiv:2606.04151v1 Announce Type: new Abstract: Two-dimensional (2D) axisymmetric simulations are conducted to investigate convection in a rotating cylindrical annulus with localized heating at the outer bottom edge and uniform cooling at the inner cylindrical wall. The resulting radial and vertical temperature gradients generate buoyancy-driven motion and produce a stratification pattern relevant to atmospheric circulation. The effects of aspect ratio (\(\Gamma\)), Rayleigh number (\(Ra =...
Influence of Aspect ratio in the Convection in Rotating Annulus In the Presence of Localized Heating
Announce Type: replace Abstract: Two-dimensional (2D) axisymmetric simulations are conducted to investigate convection in a rotating cylindrical annulus with localized heating at the outer bottom edge and uniform cooling at the inner cylindrical wall. The resulting radial and vertical temperature gradients generate buoyancy-driven motion and produce a stratification pattern relevant to atmospheric circulation. The effects of aspect ratio (\(\Gamma\)), Rayleigh number (\(Ra = 2.4 \times...