Welcome to the homepage of Lennon O'Naraigh

I am an applied mathematician by training, interested in the application of any mathematical tool to any problem of practical interest, especially the difficult ones. More specifically, I am interested in viscous interfacial flows, and I model interfacial evolution using tools from stability analysis and direct numerical simulation. I have worked on other things in the past, such as thin-film flows, the Cahn-Hilliard Equation, two-dimensional turbulence (pictured in the background), homogenization theory, and nonlinear wave equations.

I was an undergraduate at Trinity College Dublin, and I later obtained my Ph.D. at Imperial College London, under the supervision of Jean-Luc Thiffeault. I started a lectureship at University College Dublin in January 2010. Before joining UCD, I spent two very stimulating years as a postdoc in the Department of Chemical Engineering, Imperial College London.

My main current work is on the development and implemntation of high-end CFD for two-phase flows experiencing interfacial instability, along with collaborators Peter Spelt (LMFA, CNRS, Lyon), and with Prashant Valluri (Edinburgh). This has led to the development of a highly-parallelized two-phase Navier-Stokes solver called TPLS. A further collaboration with the Edinburgh Parallel Computing Centre (including Iain Bethune, David Scott, Mike Jackson, and Toni Collis) has proved very fruitful in taking this work further. A similar code development exercise for simulating the advected Cahn-Hilliard equation in three dimensions involves another co-worker (Aurore Naso, LMFA, CNRS Lyon).

In the past I have also collaborated with Omar Matar, Tamer Zaki and Darryl Holm (all at Imperial), Cesare Tronci (Surrey), and with Jean-Luc Thiffeault (UW Madison).

Please click on the headings above for more information. Since a little bit of repetition is good, information for prospective Ph.D. students can also be found by clicking directly through here, while information for current and past undergraduate students can be found here. Finally, my CV can be downloaded here in pdf form.

Office hours, Office location

Students may call in and see me any time they wish. My office number is E0.88 located in the UCD Energy Institute. This is on the ground floor of Science East. To get there, you need to go through the door just in the corner where Science East and Science North meet. The door is clearly marked with an "Energy Institute" sign. Follow the signs and corridors for the Institute.

I have no affiliation with the Energy Institute - theologically speaking, I am in the Energy Institute but not of the Energy Institute.