Wed September 28th 2016
16:30 – 17:00
ZH286
Seminar Growth or dissolution of surface nanobubbles in presence of neighbouring ones
Shantanu Maheshwari

Details:

The growth or dissolution of a surface nanobubble in the presence of another one on a chemically heterogenous surface is studied by Molecular Dynamics (MD) simulations of binary mixtures consisting of Lennard-Jones (LJ) particles. Our sim- ulations show that one surface nanobubble can grow at the expense of its neighbour- ing nanobubble, a phenomenon known as Ostwald ripening. We show that pinning of the contact line by chemical heterogeneities suppresses the Ostwald ripening by delaying the onset of growth or dissolution. The MD results are consistent with an appropriate analytical solution of the diffusion equation for this geometry. Also a linear stability analysis reveals that contact line pinning helps in stabilising the bubbles against dissolution or growth.
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The 10th Complex Motion in Fluids 2020
Max Planck Gesellschaft
MCEC
Twente
Centre for Scientific Computing
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