TY  - JOUR
AU  - Singh, S.P.
AU  - Winkler, R.G.
AU  - Gompper, G.
TI  - Nonequilibrium Forces between Dragged Ultrasoft Colloids
JO  - Physical review letters
VL  - 107
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-16776
SP  - 158301
PY  - 2011
N1  - Financial support by the German Research Foundation (DFG) within SFB TR6 is gratefully acknowledged.
AB  - The dynamical deformation of ultrasoft colloids as well as their dynamic frictional forces are numerically investigated, when one colloid is dragged past another at constant velocity. Hydrodynamic interactions are captured by a particle-based mesoscopic simulation method. At vanishing relative velocity, the equilibrium repulsive force-distance curve is obtained. At large drag velocities, in contrast, we find an apparent attractive force for departing colloids along the dragging direction. The deformation, in the close encounter of colloids, and the energy dissipation are examined as a function of the drag velocity and their separation.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000296288500015
DO  - DOI:10.1103/PhysRevLett.107.158301
UR  - https://juser.fz-juelich.de/record/16776
ER  -