Delayed coalescence of droplets with miscible liquids: Lubrication and phase field theories R. Borcia, S. Menzel, M. Bestehorn, S. Karpitschka and H. Riegler Eur. Phys. J. E, 34 3 (2011) 24 Published online: 07 March 2011 DOI: 10.1140/epje/i2011-11024-9