59 citations · 287 across the 16 of their papers we have counts for
14 papers · 1 filter
Computing sessile droplet shapes on arbitrary surfaces with a new pairwise force smoothed particle hydrodynamics model
Riley M Whebell, Timothy J Moroney, Ian W Turner +2
The study of the shape of droplets on surfaces is an important problem in the physics of fluids and has applications in multiple industries, from agrichemical spraying to microflui…
Simulation of high-speed impact of surfactant-laden drops
Olivier D. Y. Huet, Ravindra Pethiyagoda, Timothy J. Moroney +4
We develop a computational model to simulate the immediate post-impact spreading behaviour of surfactant-laden drops that impact a flat and solid surface. The model is built on the…
Mathematical models and time-frequency heat maps for surface gravity waves generated by thin ships
Nicholas R. Buttle, Ravindra Pethiyagoda, Timothy J. Moroney +4
Recent research suggests that studying the time-frequency response of ship wave signals has potential to shed light on a range of applications, such as inferring the dynamical and…
Spectrogram analysis of surface elevation signals due to accelerating ships
Ravindra Pethiyagoda, Timothy J Moroney, Gregor J Macfarlane +1
Spectrograms provide an efficient way to analyse surface elevation signals of ship waves taken from a sensor fixed at a single point in space. Recent work based on a simplified mod…
Evaporating droplets on inclined plant leaves and synthetic surfaces: experiments and mathematical models
Eloise C. Tredenick, W. Alison Forster, Ravindra Pethiyagoda +2
Hypothesis: Evaporation of surfactant droplets on leaves is complicated due to the complex physical and chemical properties of the leaf surfaces. However, for certain leaf surfaces…
Kelvin wake pattern at small Froude numbers
Ravindra Pethiyagoda, Timothy J. Moroney, Christopher J. Lustri +1
The surface gravity wave pattern that forms behind a steadily moving disturbance is well known to comprise divergent waves and transverse waves, contained within a distinctive V-sh…
Three-dimensional capillary waves due to a submerged source with small surface tension
Christopher J. Lustri, Ravindra Pethiyagoda, S. Jonathan Chapman
Steady and unsteady linearised flow past a submerged source are studied in the small-surface-tension limit, in the absence of gravitational effects. The free-surface capillary wave…
Three dimensional free-surface flow over arbitrary bottom topography
Nicholas R. Buttle, Ravindra Pethiyagoda, Timothy J. Moroney +1
We consider steady nonlinear free surface flow past an arbitrary bottom topography in three dimensions, concentrating on the shape of the wave pattern that forms on the surface of…
Efficient computation of two-dimensional steady free-surface flows
Ravindra Pethiyagoda, Timothy J. Moroney, Scott W. McCue
We consider a family of steady free-surface flow problems in two dimensions, concentrating on the effect of nonlinearity on the train of gravity waves that appear downstream of a d…
Time-frequency analysis of ship wave patterns in shallow water: modelling and experiments
Ravindra Pethiyagoda, Timothy J. Moroney, Gregor J. MacFarlane +2
A spectrogram of a ship wake is a heat map that visualises the time-dependent frequency spectrum of surface height measurements taken at a single point as the ship travels by. Spec…
Spectrograms of ship wakes: identifying linear and nonlinear wave signals
Ravindra Pethiyagoda, Scott W. McCue, Timothy J. Moroney
A spectrogram is a useful way of using short-time discrete Fourier transforms to visualise surface height measurements taken of ship wakes in real world conditions. For a steadily…
Wake angle for surface gravity waves on a finite depth fluid
Ravindra Pethiyagoda, Scott W. McCue, Timothy J. Moroney
Linear water wave theory suggests that wave patterns caused by a steadily moving disturbance are contained within a wedge whose half-angle depends on the depth-based Froude number…
What is the apparent angle of a Kelvin ship wave pattern?
Ravindra Pethiyagoda, Scott W. McCue, Timothy J. Moroney
While the half-angle which encloses a Kelvin ship wave pattern is commonly accepted to be 19.47 degrees, recent observations and calculations for sufficiently fast-moving ships sug…
Jacobian-free Newton-Krylov methods with GPU acceleration for computing nonlinear ship wave patterns
Ravindra Pethiyagoda, Scott W. McCue, Timothy J. Moroney +1
The nonlinear problem of steady free-surface flow past a submerged source is considered as a case study for three-dimensional ship wave problems. Of particular interest is the dist…