6 papers
An experimental study on the heat transport in porous media convection
Jing Dong, Lu Zhang, Ke-Qing Xia
We investigate the heat transport in porous media convection over a wide Rayleigh--Darcy number range of , and a Darcy number range of $6.18\times1…
Multiple critical Froude numbers for the centrifugal effects on heat transport in rotating Rayleigh-Bénard convection
Zhi-Cong Kang, Guang-Yu Ding, Lu Zhang +1
The influence of centrifugal effects in rotating Rayleigh-Benard convection is investigated using direct numerical simulations. We find that the Nusselt number decreases beyond a c…
Scale-dependent force balance governs transition to the geostrophic regime in liquid metal rotating convection
Shao-Peng Yang, Lin Sun, Guang-Yu Ding +2
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…
Scale-invariance and characteristic length scale for the large-scale vortices in geostrophic convective turbulence with friction
Guang-Yu Ding, Tian-Yi Pei, Hang-Yu Zhu +1
In geostrophic convective turbulence, large-scale vortices (LSVs) emerge through upscale energy transfer and are commonly regulated by large-scale friction. Yet the role of frictio…
Symmetry Breaking and Restoration in Turbulent Thermal Convection Arises from the Competition Between Advection and Buoyancy
Guang-Yu Ding, Fang Xu, Ke-Qing Xia
Spontaneous symmetry breaking (SSB) remains poorly understood in thermal convection, but hints may be found from its restoration. We hereby compare the two convection systems: expe…
Subcritical transition to turbulence in buoyancy-driven flows with multiple hysteresis loops under quasi-one-dimensional confinement
Lu Zhang, Ke-Qing Xia
We present both static and quasi-static direct numerical simulations of Rayleigh-Bénard convection in a quasi-one-dimensional domain, revealing for the first time a clear subcriti…