Prof. Sigurdur T. Thoroddsen

Principal Investigator
​Professor, Mechanical Engineering​

Research Interests

​Dr. Thoroddsen’s research work has appeared in 50 journal publications and over 50 proceedings, reports and abstracts. His work is in the area of experimental fluid mechanics, focusing on the use of ultra-high-speed video imaging to study the dynamics of free-surface flows. This includes the coalescence and breakup of drops and bubbles, splashing and spray formation, as well as the dynamics of fine jets of relevance to inkjet printers. He is also interested in coating flows, the dynamics of granular media, laser-produced cavitation dynamics and the spinning of nanofibers from electrified drops.

Selected Publications

  • Thoroddsen, S. T., Takehara, K. & Etoh, T. G. (2010), Bubble entrapment through topological change, Phys. Fluids, 22, 051701.
  • Sahay, R., Teo, C.-J. & Thoroddsen, S. T. (2010), Laser-induced onset of electrospinning, Phys. Rev. E, 81, 035302(R).
  • Thoroddsen, S. T., Takehara, K., Etoh, T. G. & Ohl, C.-D. (2009), Spray and microjets produced by focusing a laser pulse into a hemispheric drop, Phys. Fluids, 21, 112101.
  • Zhang, F. H., Li, E. Q. & Thoroddsen, S. T. (2009), Satellite formation during coalescence of unequal size drops, Phys. Rev. Lett., 102, 104502.
  • Marston, J. O. & Thoroddsen, S. T. (2008), Apex jets from impacting drops. J. Fluid Mech., 614, 293-302.


  • Postdoctoral Researcher, Institute for Nonlinear Sciences, University of California, San Diego, 1992–1994
  • Ph.D., Applied Mechanics, University of California, San Diego, 1991
  • M.S., Civil Engineering, Colorado State University, 1986
  • B.S., Mechanical Engineering, University of Iceland, 1982

Scientific and Professional Memberships

  • ​Fellow, American Physical Society, Division of Fluid Dynamics


  • ​The American Physical Society, Gallery of Fluid Motion Awards, for the years 1995, 1997, 2001, 2005 and 2012