a
Department of Mechanical Engineering, Massachusetts Institute of Technology (MIT), 77 Massachusetts Av., Cambridge, USA
E-mail: preis@mit.edu
b
Department of Civil & Environmental Engineering, MIT, Cambridge, USA
c
PMMH, CNRS UMR 7636, UPMC & Univ. Paris Diderot, ESPCI - ParisTech, 10, rue Vauquelin, Paris Cedex 05, France
d
Department of Engineering Science and Mechanics, Virginia Tech, Blacksburg, USA
e
Department of Mathematics, MIT, Cambridge, USA
f
Laboratoire d`Hydrodynamique de l`Ecole Polytechnique (LadHyX), Palaiseau, France