84 citations · 361 across the 21 of their papers we have counts for
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Direct numerical simulations of Taylor--Couette turbulence: the effect of sand grain roughness
Pieter Berghout, Xiaojue Zhu, Daniel Chung +3
Progress in roughness research, mapping any given roughness geometry to its fluid dynamic behaviour, has been hampered by the lack of accurate and direct measurements of skin-frict…
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…
Transition to ultimate Rayleigh-Bénard turbulence revealed through extended self similarity scaling analysis of the temperature structure functions
Dominik Krug, Xiaojue Zhu, Daniel Chung +3
In turbulent Rayleigh-Bénard (RB) convection, a transition to the so-called ultimate regime, in which the boundary layers (BL) are of turbulent type, has been postulated. Indeed, a…
Transition to the ultimate regime in two-dimensional Rayleigh-Bénard convection
Xiaojue Zhu, Varghese Mathai, Richard J. A. M. Stevens +2
The possible transition to the so-called ultimate regime, wherein both the bulk and the boundary layers are turbulent, has been an outstanding issue in thermal convection, since th…
Turbulent thermal superstructures in Rayleigh-Bénard convection
Richard J. A. M. Stevens, Alexander Blass, Xiaojue Zhu +2
We report the observation of superstructures, i.e.\ very large-scale and long living coherent structures in highly turbulent Rayleigh-Bénard convection up to Rayleigh . We…
Experimental investigation of heat transport in homogeneous bubbly flow
Biljana Gvozdic, Elise Almeras, Varghese Mathai +6
We present results on the global and local characterisation of heat transport in homogeneous bubbly flow. Experimental measurements were performed with and without the injection of…