77 citations · 374 across the 21 of their papers we have counts for
21 papers
Suppressing wall modes in confined rotating turbulent convection
Lázaro Martínez-Ortíz, Maarten Minartz, Youri H. Lemm +3
In confined turbulent rotating convection, the largest vertical velocities are found near the sidewalls in the form of wave-like structures known as wall modes. These structures pe…
The Persistent Clock of Turbulent Thermal Convection
Lázaro Martínez-Ortíz, Youri H. Lemm, Herman J. H. Clercx +1
The large-scale circulation (LSC) of turbulent convection is a prominent feature of its dynamics and forms the basis for descriptive theories. We show, using experimental and numer…
Dynamics of small bubbles in turbulence in non-dilute conditions
Xander M. de Wit, Hessel J. Adelerhof, André Freitas +3
Turbulent flows laden with small bubbles are ubiquitous in many natural and industrial environments. From the point of view of numerical modeling, to be able to handle a very large…
Experiments on rapidly rotating convection: the role of the Prandtl number
Hannah M. Clercx, Rudie P. J. Kunnen
Flows at planetary scales are generally driven by buoyancy and influenced by rotation. Rotating Rayleigh-Bénard convection (RRBC) is a practical and simple model that can be used t…
Tracking the rotation of light magnetic particles in turbulence
Chunlai Wu, Rudie P. J. Kunnen, Ziqi Wang +3
Particle-laden turbulence involves complex interactions between the dispersed and continuous phases. Given that particles can exhibit a wide range of properties, such as varying de…
Scale-by-scale kinetic energy flux calculations in simulations of rotating convection
Youri H. Lemm, Xander M. de Wit, Rudie P. J. Kunnen
Turbulence is an out-of-equilibrium flow state that is characterised by nonzero net fluxes of kinetic energy between different scales of the flow. These fluxes play a crucial role…
Stochastic resonance of rotating particles in turbulence
Ziqi Wang, Xander M. de Wit, Roberto Benzi +4
The chaotic dynamics of small-scale vorticity plays a key role in understanding and controlling turbulence, with direct implications for energy transfer, mixing, and coherent struc…
Efficient point-based simulation of four-way coupled particles in turbulence at high number density
Xander M. de Wit, Rudie P. J. Kunnen, Herman J. H. Clercx +1
In many natural and industrial applications, turbulent flows encompass some form of dispersed particles. Although this type of multiphase turbulent flow is omnipresent, its numeric…
Robust wall modes and their interplay with bulk turbulence in confined rotating Rayleigh-Bénard convection
Xander M. de Wit, Wouter J. M. Boot, Matteo Madonia +2
In confined rotating convection, a strong zonal flow can develop close to the side wall with a modal structure that precesses anti-cyclonically (counter to the applied rotation) al…
Reynolds number scaling and energy spectra in geostrophic convection
Matteo Madonia, Andrés J. Aguirre Guzmán, Herman J. H. Clercx +1
We report flow measurements in rotating Rayleigh--Bénard convection in the rotationally-constrained geostrophic regime. We apply stereoscopic particle image velocimetry to measure…
Velocimetry in rapidly rotating convection: spatial correlations, flow structures and length scales
Matteo Madonia, Andrés J. Aguirre Guzmán, Herman J. H. Clercx +1
Rotating Rayleigh--Bénard convection is an oft-employed model system to evaluate the interplay of buoyant forcing and Coriolis forces due to rotation, an eminently relevant interac…
Discontinuous Transitions Towards Vortex Condensates in Buoyancy-Driven Rotating Turbulence
Xander M. de Wit, Andrés J. Aguirre Guzmán, Herman J. H. Clercx +1
Using direct numerical simulations of rotating Rayleigh-Bénard convection, we explore the transitions between turbulent states from a 3D flow state towards a quasi-2D condensate kn…
Frictional boundary layer effect on vortex condensation in rotating turbulent convection
Andrés J. Aguirre Guzmán, Matteo Madonia, Jonathan S. Cheng +3
We perform direct numerical simulations of rotating Rayleigh--Bénard convection of fluids with low () and high () Prandtl numbers in a horizontally periodic layer wit…
Turbulent rotating convection confined in a slender cylinder: the sidewall circulation
Xander M. de Wit, Andrés J. Aguirre Guzmán, Matteo Madonia +3
Recent studies of rotating Rayleigh-Bénard convection at high rotation rates and strong thermal forcing have shown a significant discrepancy in total heat transport between experim…
Laboratory Exploration of Heat Transfer Regimes in Rapidly Rotating Turbulent Convection
Jonathan S. Cheng, Matteo Madonia, Andrés J. Aguirre Guzmán +1
We report heat transfer and temperature profile measurements in laboratory experiments of rapidly rotating convection in water under intense thermal forcing (Rayleigh number a…
Sharp transitions in rotating turbulent convection: Lagrangian acceleration statistics reveal a second critical Rossby number
Kim M. J. Alards, Rudie P. J. Kunnen, Richard J. A. M. Stevens +3
In RB convection for fluids with Prandtl number , rotation beyond a critical (small) rotation rate is known to cause a sudden enhancement of heat transfer which can be…
Statistical properties of thermally expandable particles in soft Rayleigh-Benard convection
Kim M. J. Alards, Rudie P. J. Kunnen, Herman J. H. Clercx +1
The dynamics of inertial particles in Rayleigh-Bénard convection, where both particles and fluid exhibit thermal expansion, is studied using direct numerical simulations (DNS). We…
A Heuristic Framework for Next-Generation Models of Geostrophic Convective Turbulence
Jonathan S Cheng, Jonathan M Aurnou, Keith Julien +1
Many geophysical and astrophysical phenomena are driven by turbulent fluid dynamics, containing behaviors separated by tens of orders of magnitude in scale. While direct simulation…
The effect of finger spreading on drag of the hand in human swimming
Josje van Houwelingen, Dennis H. J. Willemsen, Rudie P. J. Kunnen +7
The effect of finger spreading on hydrodynamic drag in swimming is studied both with a numerical simulation and with laboratory experiments. Both approaches are based on the exact…
Geostrophic convective turbulence: The effect of boundary layers
Rudie P. J. Kunnen, Rodolfo Ostilla-Mónico, Erwin P. van der Poel +2
Rayleigh--Bénard (RB) convection, the flow in a fluid layer heated from below and cooled from above, is used to analyze the transition to the geostrophic regime of thermal convecti…
The role of Stewartson and Ekman layers in turbulent rotating Rayleigh-Bénard convection
Rudie P. J. Kunnen, Richard J. A. M. Stevens, Jim Overkamp +3
When the classical Rayleigh-Bénard (RB) system is rotated about its vertical axis roughly three regimes can be identified. In regime I (weak rotation) the large scale circulation (…