The formation and disappearance of liquid bridges between two surfaces can occur either through equilibrium or nonequilibrium processes. In the first instance, the bridge molecules are in thermodynamic equilibrium with the surrounding vapor medium. In the second, chemical potential gradients result in material transfer; mechanical instabilities, because of van der Waals force jumps on approach ...

One of the ingredients in Granular Dynamics (or DEM) is a description of interparticle forces. In this paper the effect of surface roughness on Hamaker and liquid bridge interactions is investigated. Three different models are used (excluded volume, stochastic roughness and explicit asperities). In general, the latter two give similar results. Roughness decreases interactions up to several orde...

The breakup of a drop of inviscid fluid into two smaller drops is determined by a competition between surface and inertial forces. This process forms a thin filament of fluid with a connecting neck that shrinks to zero diameter at a finite time singularity. We present measurements of the electrical resistance of a liquid bridge of mercury as it undergoes pinch off. The electrical measurements a...

Flow within thick liquid films present owing to capillary effects in the pore space is of key importance in many multiphase flow applications in porous media, for example, drying or oil recovery processes. The viscous resistance to the flow is a key parameter for modelling fluid transport in such situations. It is well known for liquid films wetting the corners of tubes of polygonal cross-secti...

We derive and implement boundary integral methods for axisymmetric liquid bridge problems in the presence of an axial electric field. The liquid bridge is bounded by solid parallel electrodes placed perpendicular to the axis of symmetry and held at a constant potential difference. The fluid is assumed to be nonconducting and has permittivity different from that of the passive surrounding medium...

Results of three problems are summarized in this contribution. Each involves the fundamental capillary instability of an interfacial bridge and is an extension of previous work. The first two problems concern equilibrium shapes of liquid bridges near the stability boundary corresponding to maximum length (PlateauRayleigh limit). For the first, a previously formulated nonlinear theory to account...

A horizontal electrohydrodynamic (EHD) liquid bridge (also known as a “floating water bridge”) is phenomenon that forms when high voltage DC (kV·cm−1) applied to pure in two separate beakers. The bridge, free-floating connection between the beakers, acts cylindrical lens and refracts light. Using an interferometric set-up with line pattern placed background of light passing through split into h...