This paper concerns the Taylor-Aris dispersion of a dilute solute concentration immersed in a highly heterogeneous fluid flow having possibly sharp interfaces (discontinuities) in the diffusion coefficient and flow velocity. The focus is two-fold: (i) Calculation of the longitudinal effective dispersion coefficient, and (ii) sample path analysis of the underlying stochastic process governing th...

Tracer responses in gas-liquid, two-phase flow through a fractured layer are discussed. Experiments were carried out using a glass bead bed in a cylinder. In the results, over a wide range of flow conditions of particle size, fluids-flow velocity, and water saturation (Sw), one of three types of liquidand gas-flow pattern was obtained: a single-phase (water) flow with entrapped gases, a bubble ...

An approximate confidence interval is proposed for a robust measure of relative dispersion—the coefficient of quartile variation. The proposed method provides an alternative to interval estimates for other measures of relative dispersion. © 2005 Elsevier B.V. All rights reserved.

Miniature slow light devices based on the recently developed Surface Nanoscale Axial Photonics (SNAP) technological platform is reviewed. The theory and experimental demonstration of the SNAP bottle resonator dispersionless delay line and dispersion compensator are presented. Keywords— Nanophotonics, microresonators, microfibres

In this paper, the reflection of ultrasonic guided waves from simple dent in pipes has been investigated using finite element method and the relationship between reflection coefficient of these waves and deformation rate has been determined. Also, the effect of the parameters of wave generation source on the generated wave field has been investigated using normal modes expansion method. At firs...

A&me-The axial dispersion problem formulated in part I[11 of this series is solved for cases 2-4 and 7 identified therein. The cases analyzed here consider appendages to the finite axially dispersed reactor which are either semi-infinite sections of finite dispersion or well-mixed sections of tinite capacity. The findings possess features akin to those found in Part II[q for case 1 but obviousl...

Quantum optical coherence tomography (QOCT) makes use of an entangled twin-photon light source to carry out axial optical sectioning. We have probed the longitudinal structure of a sample comprising multiple surfaces in a dispersion-cancelled manner while simultaneously measuring the group-velocity dispersion of the interstitial media between the reflecting surfaces. The results of the QOCT exp...