A DISTINGUISHING CHARACTERISTIC AMONG PERFECTLY WETTING FLUIDS JOHN MCCUAN Abstract. We consider a cylindrical lm of uid adhering to a rigid cylinder of xed radius. The main result is to give the critical (maximum) length for which such a lm of given thickness can be stable. The problem is considered both when the cylinder remains stationary and when the uid and the cylinder are co-rotating at ...

Faraday waves near onset in an elliptical container are described by a third-order system of ordinary differential equations with characteristic slow-fast structure. These equations describe the interaction of standing waves with a weakly damped streaming flow driven by Reynolds stresses in boundary layers at the free surface and the rigid walls, and capture the proliferation with decreasing da...

The rheological properties of liquids confined to nanometer scales are important in many physical situations. In this Letter, we demonstrate that the long-range elastic deformation of the confining surfaces must be taken into account when considering the rheology of nanometric liquids. In the case of a squeeze-flow geometry, we show that below a critical distance D(c), the liquid is clamped by ...

Surface reconstruction can generate effective attractive interactions between steps on vicinal surfaces, leading to the formation of step bunches. Modified repulsive interactions arise from the fluctuations of a step in the asymmetric environment at the edge of the step bunch. These are determined by a mapping to the ground state energy of a quantum particle between two rigid walls in an extern...

We study the BPS states of a D6-brane wrapping the conifold and bound to collections of D2 and D0 branes. We find that in addition to the complexified Kähler parameter of the rigid P1 it is necessary to introduce an extra real parameter to describe BPS partition functions and marginal stability walls. The supergravity approach to BPS statecounting gives a simple derivation of results of Szendrő...

Approximate expressions are given for the characteristic impedance and propagation wavenumber for linear acoustic transmission through a gas enclosed in a rigid cylindrical duct. These expressions are most complicated in the transition zone where the thermoviscous boundary layers are on the order of the tube radius. The approximations are accurate to within 1% for all frequencies and tube diame...

This paper discusses biomechanical issues that are related to the locomotion of a robotic endoscope in the human small intestine. The robot propels itself by pushing against the intestinal walls much like a pipe crawler. However, the small intestine is not a rigid pipe, and locomotion in it is further complicated by the fact that the bowel is susceptible to damage. With the goal of engineering ...

Nanoscale self-assembly is a process in which initially disordered particles spontaneously organize into thermodynamically stable patterns. In the bulk, structure and symmetries of the patterns are determined only by the interaction potential between the components, while in the case of confined systems the impact of the system size and component-wall interaction play an important role. In the ...

This paper reports a study on the failure of masonry walls subject to vehicular impacts. The investigation encompasses homogenised material model incorporating strain rate effects suitable for impact dynamic applications using layered shell element formulation in an explicit finite framework. As focus is walls, simplicity impactor conservatively modelled as rigid and crashing normal surface wal...