116 citations · 622 across the 26 of their papers we have counts for
25 papers · 1 filter
Superposition of system response in modulated turbulent plane Couette flow
Wasy Akhtar, Rodolfo Ostilla-Monico
Traditionally, the response of a turbulent flow to modulated perturbations is expected to be complex. We conduct direct numerical simulations of turbulent Plane Couette flow, the s…
Direct numerical simulations of a cylinder cutting a vortex
Steven Soriano, Rodolfo Ostilla-Monico
The interaction between a vortex and an impacting body which is oriented normally to it is complex due to the interaction of inviscid and viscous three-dimensional mechanisms. To m…
Exploring the origin of Turbulent Taylor rolls
V. Jeganathan, K. Alba, R. Ostilla-Monico
Since Taylor's seminal paper, the existence of large-scale quasi-axisymmetric structures has been a matter of interest when studying Taylor-Couette flow. In this manuscript, we pro…
Energy transfer and vortex structures: Visualizing the incompressible turbulent energy cascade
Ryan McKeown, Alain Pumir, Shmuel M. Rubinstein +2
The transfer of kinetic energy from large to small scales is a hallmark of turbulent flows. Yet, a precise mechanistic description of this transfer, which is expected to occur via…
Transition between Boundary-Limited Scaling and Mixing-Length Scaling of Turbulent Transport in Internally Heated Convection
Sina Kazemi, Rodolfo Ostilla-Mónico, David Goluskin
Heat transport in turbulent thermal convection increases with the thermal forcing, but in almost all studies the rate of this increase is slower than it would be if transport becam…
The Effect of Modulated Driving on Non-rotating and Rotating Turbulent Plane Couette Flow
M. Wasy Akhtar, Rodolfo Ostilla Mónico
Direct numerical simulations of turbulent non-rotating and rotating Plane Couette Flow with a periodically modulated plate velocity are conducted to study the effect of modulated f…
Controlling secondary flows in Taylor-Couette flow using stress-free boundary conditions
V. Jeganathan, K. Alba, R. Ostilla-Mónico
Taylor-Couette (TC) flow, the flow between two independently rotating and co-axial cylinders is commonly used as a canonical model for shear flows. Unlike plane Couette, pinned sec…
Regime crossover in Rayleigh-Benard convection with mixed boundary conditions
Rodolfo Ostilla-Monico, Amit Amritkar
We numerically simulate three-dimensional Rayleigh-Bénard convection, the flow in a fluid layer heated from below and cooled from above, with inhomogeneous temperature boundary con…
Turbulence generation through an iterative cascade of the elliptical instability
Ryan McKeown, Rodolfo Ostilla-Monico, Alain Pumir +2
The essence of turbulent flow is the conveyance of energy through the formation, interaction, and destruction of eddies over a wide range of spatial scales--from the largest scales…
Large-scale structures in high Reynolds number rotating Waleffe flow
Shafqat Farooq, Martin Huarte-Espinosa, Rodolfo Ostilla-Mónico
We perform direct numerical simulations of rotating turbulent Waleffe flow, the flow between two parallel plates with a sinusoidal streamwise shear driving force, to study the form…
Dynamics and evolution of Turbulent Taylor rolls
Francesco Sacco, Roberto Verzicco, Rodolfo Ostilla-Mónico
In many shear- and pressure-driven wall-bounded turbulent flows secondary motions spontaneously develop and their interaction with the main flow alters the overall large-scale feat…
A Cascade Leading to the Emergence of Small Structures in Vortex Ring Collisions
Ryan McKeown, Rodolfo Ostilla-Monico, Alain Pumir +2
When vortex rings collide head-on at high enough Reynolds numbers, they ultimately annihilate through a violent interaction which breaks down their cores into a turbulent cloud. We…
Statistics of turbulence in the energy-containing range of Taylor-Couette compared to canonical wall-bounded flows
Dominik Krug, Xiang I. A. Yang, Charitha M. de Silva +4
Considering structure functions of the streamwise velocity component in a framework akin to the extended self-similarity hypothesis (ESS), de Silva \textit{et al.} (\textit{J. Flui…
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…
Controlling turbulent drag across electrolytes using electric fields
Rodolfo Ostilla-Mónico, Alpha A. Lee
Reversible in operando control of friction is an unsolved challenge crucial to industrial tribology. Recent studies show that at low sliding velocities, this control can be achieve…
Inertial waves and mean velocity profiles in a rotating pipe and a circular annulus with axial flow
Yantao Yang, Rodolfo Ostilla-Mónico, J. Z. Wu +1
In this paper we solve the inviscid inertial wave solutions in a circular pipe or annulus rotating constantly about its axis with moderate angular speed. The solutions are construc…
Salinity transfer in bounded double diffusive convection
Yantao Yang, Erwin P. van der Poel, Rodolfo Ostilla-Mónico +4
The double diffusive convection between two parallel plates is numerically studied for a series of parameters. The flow is driven by the salinity difference and stabilized by the t…
Logarithmic mean temperature profiles and their connection to plume emissions in turbulent Rayleigh-Bénard convection
Erwin P. van der Poel, Rodolfo Ostilla-Mónico, Roberto Verzicco +2
Two-dimensional simulations of Rayleigh-Bénard convection at show that vertical logarithmic mean temperature profiles can be observed in regions of the bounda…
Direct numerical simulation of Taylor-Couette flow with grooved walls: torque scaling and flow structure
Xiaojue Zhu, Rodolfo Ostilla Mónico, Roberto Verzicco +1
We present direct numerical simulations of Taylor-Couette flow with grooved walls at a fixed radius ratio with inner cylinder Reynolds number up to $Re_i=3.76\tim…
Drag reduction in numerical two-phase Taylor-Couette turbulence using an Euler-Lagrange approach
Vamsi Spandan, Rodolfo Ostilla-Monico, Roberto Verzicco +1
Two-phase turbulent Taylor-Couette (TC) flow is simulated using an Euler-Lagrange approach to study the effects of a secondary phase dispersed into a turbulent carrier phase (here…
The near-wall region of highly turbulent Taylor-Couette flow
Rodolfo Ostilla-Mónico, Roberto Verzicco, Siegfried Grossmann +1
Direct numerical simulations of the Taylor-Couette (TC) problem, the flow between two coaxial and independently rotating cylinders, have been performed. The study focuses on TC flo…
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…
Exploring the phase diagram of fully turbulent Taylor-Couette flow
Rodolfo Ostilla Mónico, Erwin P. van der Poel, Roberto Verzicco +2
Direct numerical simulations of Taylor-Couette flow (TC). Shear Reynolds numbers of up to , corresponding to Taylor numbers of , were reached. Effec…
Turbulence decay towards the linearly-stable regime of Taylor-Couette flow
Rodolfo Ostilla Mónico, Roberto Verzicco, Siegfried Grossmann +1
Taylor-Couette (TC) flow is used to probe the hydrodynamical stability of astrophysical accretion disks. Experimental data on the subcritical stability of TC are in conflict about…