569 citations · 691 across the 12 of their papers we have counts for
14 papers
Bubble-Induced Entrainment at Viscoplastic-Newtonian Interfaces
Marjan Zare, Ian Frigaard, Gregory Lawrence
The passage of single air bubbles through the horizontal interface between miscible viscoplastic and Newtonian fluids, considering various combinations of densities and viscosities…
Stratified inclined duct: two-layer hydraulics and instabilities
Amir Atoufi, Lu Zhu, Adrien Lefauve +5
The stratified inclined duct (SID) sustains an exchange flow in a long, gently sloping duct as a model for continuously-forced density-stratified flows such as those found in estua…
Stratified inclined duct: direct numerical simulations
Lu Zhu, Amir Atoufi, Adrien Lefauve +5
The stratified inclined duct (SID) experiment consists of a zero-net-volume exchange flow in a long tilted rectangular duct, which allows the study of realistic stratified shear fl…
Salt-fingering in seasonally ice-covered lakes
Jason Olsthoorn, Edmund W. Tedford, Gregory A. Lawrence
When ice forms on lakes, dissolved salts are rejected, which can lead to under-ice salt-finger formation. We performed a series of laboratory experiments to visualize these fingers…
Impact of atmospheric pressure variations on methane ebullition and lake turbidity during ice-cover
K. Zhao, E. W. Tedford, M. Zare +1
Methane ebullition (bubbling) from lake sediments is an important methane flux into the atmosphere. Previous studies have focused on the open-water season, showing that temperature…
Reynolds stresses in Holmboe instabilities: from linear growth to saturation
Adam J. K. Yang, E. W. Tedford, J. Olsthoorn +2
The Reynolds stress in Holmboe instabilities at moderate Reynolds numbers is investigated using single wavelength simulations (SWS), multiple wavelength simulations (MWS), and labo…
The Cooling Box Problem: Convection with a quadratic equation of state
Jason Olsthoorn, Edmund W. Tedford, Gregory A. Lawrence
We investigate the convective cooling of a fluid with a quadratic equation of state by performing three-dimensional direct numerical simulations of a flow with a fixed top-boundary…
Sensitivity of vortex pairing and mixing to initial perturbations in stratified shear flows
Wenjing Dong, Edmund W. Tedford, Mona Rahmani +1
The effects of different initial perturbations on the evolution of stratified shear flows that are subject to Kelvin-Helmholtz instability and vortex pairing have been investigated…
The effect of Prandtl number on mixing in low Reynolds number Kelvin-Helmholtz billows
Mona Rahmani, Gregory Lawrence, Brian Seymour
The effect of Prandtl number on the evolution of Kelvin-Helmholtz (KH) billows and the amount of mixing they generate is studied through direct numerical simulation (DNS). The resu…
Classical aspects of Hawking radiation verified in analogue gravity experiment
Silke Weinfurtner, Edmund W. Tedford, Matthew C. J. Penrice +2
There is an analogy between the propagation of fields on a curved spacetime and shallow water waves in an open channel flow. By placing a streamlined obstacle into an open channel…
A wave interaction approach to studying non-modal homogeneous and stratified shear instabilities
Anirban Guha, Gregory A. Lawrence
Holmboe (1962) postulated that resonant interaction between two or more progressive, linear interfacial waves produces exponentially growing instabilities in idealized (broken-line…
Evolution of a barotropic shear layer into elliptical vortices
Anirban Guha, Mona Rahmani, Gregory A. Lawrence
When a barotropic shear layer becomes unstable, it produces the well known Kelvin-Helmholtz instability (KH). The non-linear manifestation of KH is usually in the form of spiral bi…
Estuary Classification Revisited
Anirban Guha, Gregory A. Lawrence
This paper presents the governing equations of a tidally-averaged, width-averaged, rectangular estuary in completely nondimensionalized forms. Subsequently, we discover that the dy…
Measurement of stimulated Hawking emission in an analogue system
Silke Weinfurtner, Edmund W. Tedford, Matthew C. J. Penrice +2
There is a mathematical analogy between the propagation of fields in a general relativistic space-time and long (shallow water) surface waves on moving water. Hawking argued that b…