56 citations · 192 across the 11 of their papers we have counts for
13 papers
Catastrophic phase inversion in high-Reynolds number turbulent Taylor--Couette flow
Dennis Bakhuis, Rodrigo Ezeta, Pim A. Bullee +4
Emulsions are omnipresent in the food industry, health care, and chemical synthesis. In this Letter the dynamics of meta-stable oil-water emulsions in highly turbulent ($10^{11}\le…
Bubbly drag reduction using a hydrophobic inner cylinder in Taylor-Couette turbulence
Pim A. Bullee, Ruben A. Verschoof, Dennis Bakhuis +4
In this study we experimentally investigate bubbly drag reduction in a highly turbulent flow of water with dispersed air at $5.0 \times 10^{5} \leq \text{Re} \leq 1.7 \times 10^{6}…
Double maxima of angular momentum transport in TC turbulence
Rodrigo Ezeta, Francesco Sacco, Dennis Bakhuis +5
We use experiments and direct numerical simulations to probe the phase-space of low-curvature Taylor--Couette (TC) flow in the vicinity of the ultimate regime. The cylinder radius…
Effect of axially varying sandpaper roughness on bubbly drag reduction in Taylor-Couette turbulence
Pim A. Bullee, Dennis Bakhuis, Rodrigo Ezeta +4
We experimentally investigate the influence of alternating rough and smooth walls on bubbly drag reduction (DR). We apply rough sandpaper bands of width between and…
Drag reduction in boiling Taylor-Couette turbulence
Rodrigo Ezeta, Dennis Bakhuis, Sander G. Huisman +2
We create a highly controlled lab environment-accessible to both global and local monitoring-to analyse turbulent boiling flows and in particular their shear stress in a statistica…
Statistics of rigid fibers in strongly sheared turbulence
Dennis Bakhuis, Varghese Mathai, Ruben A. Verschoof +4
Practically all flows are turbulent in nature and contain some kind of irregularly-shaped particles, e.g. dirt, pollen, or life forms such as bacteria or insects. The effect of the…
Controlling secondary flow in Taylor-Couette turbulence through spanwise-varying roughness
Dennis Bakhuis, Rodrigo Ezeta, Pieter Berghout +7
Highly turbulent Taylor-Couette flow with spanwise-varying roughness is investigated experimentally and numerically (direct numerical simulations (DNS) with an immersed boundary me…
Rough wall turbulent Taylor-Couette flow: the effect of the rib height
Ruben A. Verschoof, Xiaojue Zhu, Dennis Bakhuis +4
In this study, we combine experiments and direct numerical simulations to investigate the effects of the height of transverse ribs at the walls on both global and local flow proper…
The influence of wall roughness on bubble drag reduction in Taylor-Couette turbulence
Ruben A. Verschoof, Dennis Bakhuis, Pim A. Bullee +3
We experimentally study the influence of wall roughness on bubble drag reduction in turbulent Taylor-Couette flow, i.e.\ the flow between two concentric, independently rotating cyl…
Wall roughness induces asymptotic ultimate turbulence
Xiaojue Zhu, Ruben A. Verschoof, Dennis Bakhuis +4
Turbulence is omnipresent in Nature and technology, governing the transport of heat, mass, and momentum on multiple scales. For real-world applications of wall-bounded turbulence,…
Finite-sized rigid spheres in turbulent Taylor-Couette flow
Dennis Bakhuis, Ruben A. Verschoof, Varghese Mathai +3
We report on the modification of drag by neutrally buoyant spherical particles in highly turbulent Taylor-Couette flow. These particles can be used to disentangle the effects of si…
Air cavities at the inner cylinder of turbulent Taylor-Couette flow
Ruben A. Verschoof, Dennis Bakhuis, Pim A. Bullee +3
Air cavities, i.e. air layers developed behind cavitators, are seen as a promising drag reducing method in the maritime industry. Here we utilize the Taylor-Couette (TC) geometry,…
Mixed insulating and conducting thermal boundary conditions in Rayleigh-Bénard convection
Dennis Bakhuis, Rodolfo Ostilla-Mónico, Erwin P. van der Poel +2
A series of direct numerical simulations of Rayleigh-Bénard convection, the flow in a fluid layer heated from below and cooled from above, were conducted to investigate the effect…