153 citations · 1.3k across the 35 of their papers we have counts for
36 papers
Universal transport laws in buoyancy-driven porous mixing
Marco De Paoli, Xiaojue Zhu
Buoyancy-driven convection in porous media governs heat and mass transport in a wide range of natural and engineered systems, from groundwater aquifers and geothermal reservoirs to…
Effects of the radiative interior on solar inertial modes
Suprabha Mukhopadhyay, Yuto Bekki, Xiaojue Zhu +1
Solar inertial modes are believed to play important diagnostic and dynamical roles in the Sun's differentially rotating convection zone. However, the coupling of these modes to the…
Latitudinal dependence of heat transport in turbulent geostrophic convection
Veeraraghavan Kannan, Varghese Mathai, Xiaojue Zhu
Latitudinal variations in turbulent heat flux play a key role in the thermal and magnetic evolution of rapidly rotating planets and stars. Although global spherical-shell simulatio…
Flapping dynamics of a compliant membrane in a uniform incoming flow
Chengyao Zhang, Ankang Gao, Xiaojue Zhu
Recent theoretical and experimental investigations have revealed that flapping compliant membrane wings can significantly enhance propulsive performance (e.g. Tzezana and Breuer, 2…
Vortex-magnetic competition and regime transitions in antiparallel flux tubes
Weiyu Shen, Rodolfo Ostilla-Mónico, Xiaojue Zhu
Vortex-magnetic interactions shape magnetohydrodynamic (MHD) turbulence, influencing energy transfer in astrophysical, geophysical, and industrial systems. On the Sun, granular-sca…
Reinforcement-learning-based control of turbulent channel flows at high Reynolds numbers
Zisong Zhou, Mengqi Zhang, Xiaojue Zhu
Deep reinforcement learning (DRL) is employed to develop control strategies for drag reduction in direct numerical simulations (DNS) of turbulent channel flows at high Reynolds num…
Assessing the validity of the anelastic and Boussinesq approximations to model solar inertial modes
Suprabha Mukhopadhyay, Yuto Bekki, Xiaojue Zhu +1
Global-scale inertial modes of oscillations have been recently observed on the Sun. They might play an important dynamic and diagnostic role for the Sun. This work aims to assess t…
Linear instability in thermally-stratified quasi-Keplerian flows
Dongdong Wan, Rikhi Bose, Mengqi Zhang +1
Quasi-Keplerian flow, a special regime of Taylor-Couette co-rotating flow, is of great astrophysical interest for studying angular momentum transport in accretion disks. The well-k…
Transport scaling in porous media convection
Xiaojue Zhu, Yifeng Fu, Marco De Paoli
We present a theory to describe the Nusselt number (), corresponding to the heat or mass flux, as a function of the Rayleigh--Darcy number (), the ratio of buoyant driving…
Threshold Current Density for Diffusion-controlled Stability of Electrolytic Surface Nanobubbles
Yixin Zhang, Xiaojue Zhu, Jeffery A. Wood +1
Understanding the stability mechanism of surface micro/nanobubbles adhered to gas-evolving electrodes is essential for improving the efficiency of water electrolysis, which is know…
Scaling relations in quasi-static magnetoconvection with a strong vertical magnetic field
Shujaut H. Bader, Xiaojue Zhu
The scaling law for the horizontal length scale relative to the domain height , originating from the linear theory of quasi-static magnetoconvection, $\ell/L \sim Q^{-1/6…
Three-dimensional Turbulent Reconnection within Solar Flare Current Sheet
Yulei Wang, Xin Cheng, Mingde Ding +3
Solar flares can release coronal magnetic energy explosively and may impact the safety of near-earth space environments. Their structures and properties on macroscale have been int…
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…
Predicting unavailable parameters from existing velocity fields of turbulent flows using a GAN-based model
Linqi Yu, Mustafa Z. Yousif, Young-Woo Lee +4
In this study, an efficient deep-learning model is developed to predict unavailable parameters, e.g., streamwise velocity, temperature, and pressure from available velocity compone…
Spatial population genetics with fluid flow
Roberto Benzi, David R. Nelson, Suraj Shankar +2
The growth and evolution of microbial populations is often subjected to advection by fluid flows in spatially extended environments, with immediate consequences for questions of sp…
Effects of radius ratio on annular centrifugal Rayleigh-Bénard convection
Dongpu Wang, Hechuan Jiang, Shuang Liu +2
We report on a three-dimensional direct numerical simulation study of flow structure and heat transport in the annular centrifugal Rayleigh-Bénard convection (ACRBC) system, with c…
Closing the loop: nonlinear Taylor vortex flow through the lens of resolvent analysis
Benedikt Barthel, Xiaojue Zhu, Beverley J. McKeon
We present an optimization-based method to efficiently calculate accurate nonlinear models of Taylor vortex flow. We use the resolvent formulation of McKeon & Sharma (2010) to mode…
Supergravitational turbulent thermal convection
Hechuan Jiang, Xiaojue Zhu, Dongpu Wang +2
High-Rayleigh number convective turbulence is ubiquitous in many natural phenomena and in industries, such as atmospheric circulations, oceanic flows, flows in the fluid core of pl…
From Rayleigh-Bénard convection to porous-media convection: how porosity affects heat transfer and flow structure
Shuang Liu, Linfeng Jiang, Kai Leong Chong +6
We perform a numerical study of the heat transfer and flow structure of Rayleigh-Bénard (RB) convection in (in most cases regular) porous media, which are comprised of circular, so…
Diffusive interaction of multiple surface nanobubbles and nanodroplets: shrinkage, growth, and coarsening
Xiaojue Zhu, Roberto Verzicco, Xuehua Zhang +1
Surface nanobubbles are nanoscopic spherical-cap shaped gaseous domains on immersed substrates which are stable, even for days. After the stability of a {\it single} surface nanobu…
Reply to "Absence of Evidence for the Ultimate Regime in Two-Dimensional Rayleigh-Bénard Convection"
Xiaojue Zhu, Varghese Mathai, Richard J. A. M. Stevens +2
Rely to the comment by Doering et al. in Phys. Rev. Lett. 123, 259401 (2019)
Flow organization and heat transfer in turbulent wall sheared thermal convection
Alexander Blass, Xiaojue Zhu, Roberto Verzicco +2
We perform direct numerical simulations of wall sheared Rayleigh-Bénard (RB) convection for Rayleigh numbers up to , Prandtl number unity, and wall shear Reynolds numbers…
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…