Turbulence suppression by cardiac-cycle-inspired driving of pipe flow

D Scarselli, JM Lopez, A Varshney, B Hof - Nature, 2023 - nature.com
Flows through pipes and channels are, in practice, almost always turbulent, and the
multiscale eddying motion is responsible for a major part of the encountered friction losses …

Routes to turbulence in Taylor–Couette flow

D Feldmann, D Borrero-Echeverry… - … of the Royal …, 2023 - royalsocietypublishing.org
Fluid flows between rotating concentric cylinders exhibit two distinct routes to turbulence. In
flows dominated by inner-cylinder rotation, a sequence of linear instabilities leads to …

Vortex merging and splitting events in viscoelastic Taylor–Couette flow

JM Lopez - Journal of Fluid Mechanics, 2022 - cambridge.org
Recent experiments have reported a novel transition to elasto-inertial turbulence in the
Taylor–Couette flow of a dilute polymer solution. Unlike previously reported transitions, this …

Effect of waveform on turbulence transition in pulsatile pipe flow

D Morón, D Feldmann, M Avila - Journal of Fluid Mechanics, 2022 - cambridge.org
Pulsatile flow in a straight pipe is a model system for unsteady internal flows in industrial
engineering and physiology. In some parameter regimes, the laminar flow is susceptible to …

Direct numerical simulation of two-phase pipe flow: Influence of the domain length on the flow regime

C Plana, B Song, M Avila - International Journal of Multiphase Flow, 2021 - Elsevier
We investigate the dynamics of a kerosene–water mixture in a vertical pipe flow by solving
the Cahn–Hilliard–Navier–Stokes equations. We compute the linear stability of laminar core …

Arrow-shaped elasto-inertial rotating waves

JM Lopez, SA Altmeyer - Philosophical Transactions of …, 2023 - royalsocietypublishing.org
We present direct numerical simulations of the Taylor–Couette flow of a dilute polymer
solution when only the inner cylinder rotates and the curvature of the system is moderate (η …

Spatiotemporal intermittency in pulsatile pipe flow

D Feldmann, D Morón, M Avila - Entropy, 2020 - mdpi.com
Despite its importance in cardiovascular diseases and engineering applications, turbulence
in pulsatile pipe flow remains little comprehended. Important advances have been made in …

EMPRESS: Accelerating Scientific Discovery through Descriptive Metadata Management

M Lawson, W Gropp, J Lofstead - ACM Transactions on Storage, 2022 - dl.acm.org
High-performance computing scientists are producing unprecedented volumes of data that
take a long time to load for analysis. However, many analyses only require loading in the …

Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes

D Morón, M Avila - Physical Review Fluids, 2024 - APS
We show that, in the transitional regime of pulsatile pipe flow, at moderate-to-high
amplitudes 0.5≲ A≲ 1, the first long-lived turbulent structures are localized and take the form …

Detection of dominant large-scale coherent structures in turbulent pipe flow

A Shahirpour, C Egbers, J Sesterhenn - arXiv preprint arXiv:2309.15189, 2023 - arxiv.org
Large-scale coherent structures are identified in turbulent pipe flow at $ Re_\tau= 181$ by
having long lifetimes, living on large scales and travelling with a certain group velocity. A …