74 citations · 528 across the 32 of their papers we have counts for
32 papers
Synchronisation in two-dimensional damped-driven Navier-Stokes turbulence: insights from data assimilation and Lyapunov analysis
Masanobu Inubushi, Colm-cille P. Caulfield
In Navier--Stokes (NS) turbulence, large-scale turbulent flows inevitably determine small-scale flows. Previous studies using data assimilation with the three-dimensional NS equati…
Anisotropy of emergent large-scale dynamics in forced stratified shear flows
Philipp P Vieweg, Colm-cille P Caulfield
Although stably stratified shear flows, where the base velocity shear is quasi-continuously forced externally, arise in many geophysically and environmentally relevant circumstance…
Equation-informed data-driven identification of flow budgets and dynamics
Nataliya Sevryugina, Serena Costanzo, Stephen de Bruyn Kops +3
Computational Fluid Dynamics (CFD) is an indispensable method of fluid modelling in engineering applications, reducing the need for physical prototypes and testing for tasks such a…
Numerical validation of scaling laws for stratified turbulence
Pascale Garaud, Greg P. Chini, Laura Cope +2
Recent theoretical progress using multiscale asymptotic analysis has revealed various possible regimes of stratified turbulence. Notably, buoyancy transport can either be dominated…
Regimes of stratified turbulence at low Prandtl number
Kasturi Shah, Gregory P. Chini, Colm-cille P. Caulfield +1
Quantifying transport by strongly stratified turbulence in low Prandtl number () fluids is critically important for the development of better models for the structure and evolu…
Prandtl number effects on extreme mixing events in forced stratified turbulence
Nicolaos Petropoulos, Miles M. P. Couchman, Ali Mashayek +2
Relatively strongly stratified turbulent flows tend to self-organise into a 'layered anisotropic stratified turbulence' (LAST) regime, characterised by relatively deep and well-mix…
Péclet-number dependence of optimal mixing strategies identified using multiscale norms
Conor Heffernan, Colm-cille Caulfield
The optimization of the mixing of a passive scalar at finite Péclet number (where are characteristic velocity and length scales and is the scalar diffusivity) i…
Mixing across stable density interfaces in forced stratified turbulence
Miles M. P. Couchman, Stephen M. de Bruyn Kops, Colm-cille P. Caulfield
Understanding how turbulence enhances irreversible scalar mixing in density-stratified fluids is a central problem in geophysical fluid dynamics. While isotropic overturning region…
Turbulent disruption of density staircases in stratified shear flows
Nicolaos Petropoulos, Ali Mashayek, Colm-cille P. Caulfield
Formation of step-like 'density staircase' distributions induced by stratification and turbulence has been widely studied and can be explained by the 'instability' of a sufficientl…
Anthropogenic Mixing of Seasonally Stratified Shelf Seas by Offshore Wind Farm Infrastructure
Robert Dorrell, Charlie Lloyd, Ben Lincoln +9
The offshore wind energy sector has rapidly expanded over the past two decades, providing a renewable energy solution for coastal nations. Sector development has been led in Europe…
Probabilistic neural networks for predicting energy dissipation rates in geophysical turbulent flows
Sam F. Lewin, Stephen M. de Bruyn Kops, Gavin D. Portwood +1
Motivated by oceanographic observational datasets, we propose a probabilistic neural network (PNN) model for calculating turbulent energy dissipation rates from vertical columns of…
Incommensurate and commensurate antiferromagnetic states in CaMn2As2 and SrMn2As2 revealed by 75As NMR
Q. -P. Ding, N. S. Sangeetha, Abhishek Pandey +2
We carried out As nuclear magnetic resonance (NMR) measurements on the trigonal CaMnAs and SrMnAs insulators exhibiting antiferromagnetic (AFM) ordered state…
Robust and efficient identification of optimal mixing perturbations using proxy multiscale measures
Conor Heffernan, Colm-cille Caulfield
Understanding and optimizing passive scalar mixing in a diffusive fluid flow at finite Péclet number (where and are characteristic velocity and length scales, an…
Exploiting self-organized criticality in strongly stratified turbulence
Gregory P. Chini, Guillaume Michel, Keith Julien +2
A multiscale reduced description of turbulent free shear flows in the presence of strong stabilizing density stratification is derived via asymptotic analysis of the Boussinesq equ…
Implications of inertial subrange scaling for stably stratified mixing
G. D. Portwood, S. M. de Bruyn Kops, C. P. Caulfield
The effects of turbulent dynamic range on scalar mixing in stably stratified turbulence are investigated by an adaptation of the theoretical passive scalar modelling arguments of B…
Quantifying mixing and available potential energy in vertically periodic simulations of stratified flows
Christopher J. Howland, John R. Taylor, C. P. Caulfield
Turbulent mixing exerts a significant influence on many physical processes in the ocean. In a stably stratified Boussinesq fluid, this irreversible mixing describes the conversion…
Shear-induced breaking of internal gravity waves
Christopher J. Howland, John R. Taylor, C. P. Caulfield
Motivated by observations of turbulence in the strongly stratified ocean thermocline, we use direct numerical simulations to investigate the interaction of a sinusoidal shear flow…
The viscous Holmboe instability for smooth shear and density profiles
Jeremy P. Parker, Colm-cille P. Caulfield, Rich R. Kerswell
The Holmboe wave instability is one of the classic examples of a stratified shear instability, usually explained as the result of a resonance between a gravity wave and a vorticity…
The dynamics of stratified horizontal shear flows at low Péclet number
L. Cope, P. Garaud, C. P. Caulfield
We consider the dynamics of a vertically stratified, horizontally-forced Kolmogorov flow. Motivated by astrophysical systems where the Prandtl number is often asymptotically small,…
Asymptotic dynamics of high dynamic range stratified turbulence
G. D. Portwood, S. M. de Bruyn Kops, C. P. Caulfield
Direct numerical simulations of homogeneous sheared and stably stratified turbulence are considered to probe the asymptotic high-dynamic range regime suggested by Gargett et al. 19…
Self-organized criticality of turbulence in strongly stratified mixing layers
Hesam Salehipour, W. R. Peltier, C. P. Caulfield
Motivated by the importance of stratified shear flows in geophysical and environmental circumstances, we characterize their energetics, mixing and spectral behavior through a serie…
Thermodynamics of the scalar radiation in the presence of a reflecting plane wall
E. S. Moreira
This paper investigates further how the presence of a single reflecting plane wall modifies the usual Planckian forms in the thermodynamics of the massless scalar radiation in -…
Mixing and entrainment are suppressed in inclined gravity currents
Maarten van Reeuwijk, Markus Holzner, C. P. Caulfield
We explore the dynamics of inclined temporal gravity currents using direct numerical simulation, and find that the current creates an environment in which the flux Richardson numbe…
Optimal mixing in two-dimensional stratified plane Poiseuille flow at finite Péclet and Richardson numbers
F. Marcotte, C. P. Caulfield
We consider the nonlinear optimisation of irreversible mixing induced by an initial finite amplitude perturbation of a statically stable density-stratified fluid. A constant pressu…