153 citations · 1.3k across the 35 of their papers we have counts for
5 papers · 1 filter
Controlling heat transport and flow structures in thermal turbulence using ratchet surfaces
Hechuan Jiang, Xiaojue Zhu, Varghese Mathai +3
In this combined experimental and numerical study on thermally driven turbulence in a rectangular cell, the global heat transport and the coherent flow structures are controlled wi…
Mass and moment of inertia govern the transition in the dynamics and wakes of freely rising and falling cylinders
Varghese Mathai, Xiaojue Zhu, Chao Sun +1
In this Letter, we study the motion and wake-patterns of freely rising and falling cylinders in quiescent fluid. We show that the amplitude of oscillation and the overall system-dy…
AFiD-GPU: a versatile Navier-Stokes Solver for Wall-Bounded Turbulent Flows on GPU Clusters
Xiaojue Zhu, Everett Phillips, Vamsi Spandan +9
The AFiD code, an open source solver for the incompressible Navier-Stokes equations ({\color{blue}\burl{http://www.afid.eu}}), has been ported to GPU clusters to tackle large-scale…
Roughness-facilitated local 1/2 scaling does not imply the onset of the ultimate regime of thermal convection
Xiaojue Zhu, Richard J. A. M. Stevens, Roberto Verzicco +1
In thermal convection, roughness is often used as a means to enhance heat transport, expressed in Nusselt number. Yet there is no consensus on whether the Nusselt vs. Rayleigh numb…
Life stages of wall-bounded decay of Taylor-Couette turbulence
Rodolfo Ostilla-Mónico, Xiaojue Zhu, Vamsi Spandan +2
The decay of Taylor-Couette turbulence, i.e~the flow between two coaxial and independently rotating cylinders, is numerically studied by instantaneously stopping the forcing from a…