354 citations · 1.2k across the 25 of their papers we have counts for
25 papers
Unifying heat transport model for the transition between buoyancy-dominated and Lorentz-force-dominated regimes in quasistatic magnetoconvection
Andrei Teimurazov, Matthew McCormack, Moritz Linkmann +1
In magnetoconvection, the flow of electromagnetically conductive fluid is driven by a combination of buoyancy forces, which create the fluid motion due to thermal expansion and con…
Wall mode dynamics and transition to chaos in magnetoconvection with a vertical magnetic field
Matthew McCormack, Andrei Teimurazov, Olga Shishkina +1
Quasistatic magnetoconvection of a low Prandtl number fluid ( with a vertical magnetic field is considered in a unit aspect ratio box with no-slip boundaries. A…
Scaling regimes in rapidly rotating thermal convection at extreme Rayleigh numbers
Jiaxing Song, Olga Shishkina, Xiaojue Zhu
The geostrophic turbulence in rapidly rotating thermal convection exhibits characteristics shared by many highly turbulent geophysical and astrophysical flows. In this regime, the…
Oscillatory large-scale circulation in liquid-metal thermal convection and its structural unit
Andrei Teimurazov, Sanjay Singh, Sylvie Su +3
In Rayleigh-Bénard convection (RBC), the size of a flow domain and its aspect ratio (a ratio between the spatial length and height of the domain) affect the shape of th…
Flow states and heat transport in Rayleigh--Bénard convection with different sidewall boundary conditions
Philipp Reiter, Xuan Zhang, Olga Shiskina
This work addresses the effects of different thermal sidewall boundary conditions on the formation of flow states and heat transport in two- and three-dimensional Rayleigh--Bénard…
Connecting wall modes and boundary zonal flows in rotating Rayleigh--Bénard convection
Robert E. Ecke, Xuan Zhang, Olga Shishkina
Using direct numerical simulations, we study rotating Rayleigh-Bénard convection in a cylindrical cell for a broad range of Rayleigh, Ekman, and Prandtl numbers from the onset of w…
Crossover of the relative heat transport contributions of plume ejecting and impacting zones in turbulent Rayleigh-Bénard convection
Philipp Reiter, Olga Shishkina, Detlef Lohse +1
Turbulent thermal convection is characterized by the formation of large-scale structures and strong spatial inhomogeneity. This work addresses the relative heat transport contribut…
Universal properties of penetrative turbulent Rayleigh--Bénard convection in cold water near
Qi Wang, Philipp Reiter, Detlef Lohse +1
Penetrative turbulence, which occurs in a convectively unstable fluid layer and penetrates into an adjacent, originally stably stratified layer, is numerically and theoretically an…
Regime transitions in thermally driven high-Rayleigh number vertical convection
Qi Wang, Hao-Ran Liu, Roberto Verzicco +2
Vertical convection is investigated using direct numerical simulations over a wide range of Rayleigh numbers with fixed Prandtl number , in a two-dime…
Scaling in internally heated convection: a unifying theory
Qi Wang, Detlef Lohse, Olga Shishkina
We offer a unifying theory for turbulent purely internally heated convection, generalizing the unifying theories of Grossmann and Lohse (2000, 2001) for Rayleigh--Bénard turbulence…
Boundary zonal flows in rapidly rotating turbulent thermal convection
Xuan Zhang, Robert E. Ecke, Olga Shishkina
Recently, in Zhang et al. (2020), it was found that in rapidly rotating turbulent Rayleigh-Bénard convection (RBC) in slender cylindrical containers (with diameter-to-height aspect…
Generation of zonal flows in convective systems by travelling thermal waves
Philipp Reiter, Xuan Zhang, Rodion Stepanov +1
This work addresses the effect of travelling thermal waves applied at the fluid layer surface, on the formation of global flow structures in 2D and 3D convective systems. For a bro…
Data-driven identification of the spatio-temporal structure of turbulent flows by streaming Dynamic Mode Decomposition
Rui Yang, Xuan Zhang, Philipp Reiter +3
Streaming Dynamic Mode Decomposition (sDMD) (Hemati et al., Phys. Fluids 26(2014)) is a low-storage version of Dynamic Mode Decomposition (DMD) (Schmid, J. Fluid Mech. 656 (2010)),…
Multiple states in turbulent large-aspect ratio thermal convection: What determines the number of convection rolls?
Qi Wang, Roberto Verzicco, Detlef Lohse +1
Recent findings suggest that wall-bounded turbulent flow can take different statistically stationary turbulent states, with different transport properties, even for the very same v…
Periodically modulated thermal convection
Rui Yang, Kai Leong Chong, Qi Wang +3
Many natural and industrial turbulent flows are subjected to time-dependent boundary conditions. Despite being ubiquitous, the influence of temporal modulations (with frequency …
Elliptical Instability and Multi-Roll Flow Modes of the Large-scale Circulation in Confined Turbulent Rayleigh-Bénard Convection
Lukas Zwirner, Andreas Tilgner, Olga Shishkina
Turbulent Rayleigh-Bénard convection in slender cylindrical cells exhibits rich dynamics of the large-scale circulation (LSC), with several rolls stacked on top of each other. We p…
Boundary Zonal Flow in Rotating Turbulent Rayleigh-Bénard Convection
Xuan Zhang, Dennis P. M. van Gils, Susanne Horn +7
For rapidly rotating turbulent Rayleigh--Bénard convection in a slender cylindrical cell, experiments and direct numerical simulations reveal a boundary zonal flow (BZF) that repla…
Inclined turbulent thermal convection in liquid sodium
Lukas Zwirner, Ruslan Khalilov, Ilya Kolesnichenko +7
Inclined turbulent thermal convection by large Rayleigh numbers in extremely small-Prandtl-number fluids is studied based on results of both, measurements and high-resolution numer…
Comparison of computational codes for direct numerical simulations of turbulent Rayleigh-Bénard convection
Gijs L. Kooij, Mikhail A. Botchev, Edo M. A. Frederix +7
Computational codes for direct numerical simulations of Rayleigh-Bénard (RB) convection are compared in terms of computational cost and quality of the solution. As a benchmark case…
Effect of Prandtl number on heat transport enhancement in Rayleigh-Bénard convection under geometrical confinement
Kai Leong Chong, Sebastian Wagner, Matthias Kaczorowski +2
We study, using direct numerical simulations, the effect of geometrical confinement on heat transport and flow structure in Rayleigh-Bénard convection in fluids with different Pran…
Mean Temperature Profiles in Turbulent Thermal Convection
Olga Shishkina, Susanne Horn, Mohammad S. Emran +1
To predict the mean temperature profiles in turbulent thermal convection, the thermal boundary layer (BL) equation including the effects of fluctuations has to be solved. In Shishk…
Scaling relations in large-Prandtl-number natural thermal convection
Olga Shishkina, Mohammad S. Emran, Siegfried Grossmann +1
In this study we follow Grossmann and Lohse, Phys. Rev. Lett. 86 (2001), who derived various scalings regimes for the dependence of the Nusselt number and the Reynolds number…
Thermal Boundary Layer Equation for Turbulent Rayleigh-Benard Convection
Olga Shishkina, Susanne Horn, Sebastian Wagner +1
We report a new thermal boundary layer equation for turbulent Rayleigh-Benard convection for Prandtl number Pr>1 that takes into account the effect of turbulent fluctuations. These…
Toroidal and poloidal energy in rotating Rayleigh-Bénard convection
Susanne Horn, Olga Shishkina
We consider rotating Rayleigh-Bénard convection of a fluid with a Prandtl number of in a cylindrical cell with an aspect ratio . Direct numerical simulations wer…