Discrete Electrolytes Research

Liquid ionics beyond Poisson-Boltzmann

Publication year
to 2010

Publications: to 2010


J.R.T. Seddon & H.J.W. Zandvliet
"Comment on: ‘On the stability of bubbles trapped at a solid–liquid interface: A thermodynamical approach'"
Surface Science 604, 476 (2010)

In a recent letter, Colaço et al. presented a model for the stability of surface nanobubbles. The authors demonstrated that surface nanobubbles are stable on smooth substrates if the contact angle is greater than θ = 126.6o, and that surface roughness and encapsulation of a crevice beneath the nanobubble can increase this stability.


J.R.T. Seddon, O. Bliznyuk, E.S. Kooij, B. Poelsema, H.J.W. Zandvliet, & D. Lohse
"Dynamic dewetting through micropancake growth"
Langmuir 26, 9640 (2010)

We experimentally investigate the dynamics of nanometer-high, micrometer-wide gassy layers at the interface between a hydrophobic solid and bulk water. These micropancakes grow laterally in time, on the timescale of an hour, leading to partial dewetting of the solid. The growth is directional, mediated by chemical roughness on the substrate, and transient, occurring within the first hour after liquid deposition. We use circularity to measure the roundness of a micropancake (circularity C = 2(πA)1/2/L, where A is the surface area and L is the perimeter). The growth is anisotropic, as demonstrated by a decrease in circularity with time. However, once a micropancake reaches size saturation, its bulk rearranges its shape in order to minimize the length of its three-phase line. We interpret this combination of growth followed by bulk rearrangement as dynamic dewetting.


T. Mullin, J.R.T. Seddon, M.D. Mantle, & A. Sederman
"Bifurcation phenomena in the flow through a sudden expansionin a circular pipe"
Phys. Fluids 21, 014110 (2009)

We report the results of an experimental investigation into bifurcation phenomena in laminar and time-dependent flows through a sudden expansion in a circular pipe. The flow state was investigated using high resolution magnetic resonance imaging techniques which have enabled us to identify important qualitative features in the flow field and make quantitative estimates of the velocity distributions. Using these techniques we have uncovered evidence for a steady symmetry breaking bifurcation at a critical value of the Reynolds number. The asymmetric steady state which arises at the bifurcation point eventually gives way to time dependence in the form of bursts of periodic motion with further increase in flow rate.


J.R.T. Seddon & T. Mullin
"Cavitation in anisotropic fluids"
Phys. Fluids 20, 023102 (2008)


J.R.T. Seddon & T. Mullin
"The motion of a prolate ellipsoid in a rotating Stokes flow"
J. Fluid Mech. 583, 123 (2007)


J.R.T. Seddon & T. Mullin
"Reverse rotation of a cylinder near a wall"
Phys. Fluids 18, 041703 (2006)


L. Yang, J.R.T. Seddon, T. Mullin, C. del Pino, & J. Ashmore
"The motion of a rough particle in a Stokes flow adjacent to a boundary"
J. Fluid Mech. 557, 337 (2006)


M.J. Lees, M.S. Thurlow, J.R.T. Seddon, & P.G.J. Lucas
"Critical Rayleigh number controversy for liquid 4He"
AIP Conf. Proc. 850, 153 (2006)


J.R.T. Seddon, M.S. Thurlow, M.J. Lees, & P.G.J. Lucas
"Optical flow visualization system for the cryogenic environment"
Rev. Sci. Instrum. 76, 063903 (2005)


J.R.T. Seddon, M.S. Thurlow, & P.G.J. Lucas
"Visualising superfluid turbulent counterflow"
J. Low Temp. Phys. 138, 505 (2005)


J.R.T. Seddon, M.S. Thurlow, & P.G.J. Lucas
"Quantised vortex visualisation"
J. Low Temp. Phys. 138, 499 (2005)


M.J. Lees, M.S. Thurlow, J.R.T. Seddon, & P.G.J. Lucas
"Convective roll dynamics in liquid 4He near the onset of convection"
Phys. Rev. Lett. 93, 144502 (2004)


M.J. Lees, M.S. Thurlow, J.R.T. Seddon, & P.G.J. Lucas
"Periodic convection in liquid 4He close to onset"
Physica B 329-333, 222 (2003)


J.R.T. Seddon, M.S. Thurlow, M.J. Lees, & P.G.J. Lucas
"Quantised vortex line visualisation in superfluid helium using low-temperature optics"
Physica B 329-333, 220 (2003)