As suggested by the title, the research reported in this thesis concerns two problems. The first (and main) part of the thesis, which consists of Chapters 1 and 2, concerns the surface-tension-driven instability of ...

Fluid ows are constitutive to a wide variety of scienti c and engineering problems, owing to the fact that they encompass a vast range of spatial and temporal scales. An accurate prediction of the uid ow has ...

In this thesis, vortex shedding from hxed and inhne oscillating rectangular cylinders is investigated for the first time to our knowledge. This is a numerical study, and the Lattice Boltzmann method has been used for ...

Addition of small quantity of polymer to a turbulent flow is shown to reduce the drag drastically. This phenomena (also known as Tom’s effect) is studied very rigorously, because of industrial applications and also as a ...

This thesis starts with a brief overview of patterns in rapid granular flows driven by vibration, gravity and shear, e.g. standing wave patterns and convection rolls in a vibrated granular system, density waves in gravity ...

Abstract not available

The gravity-driven flow of granular materials in a vertical channel is simulated us- ing molecular dynamics technique. The granular particles are modelled as smooth hard disks, so the simulations are performed in two ...

In the present thesis, the gravity driven granular Poiseuille flow has been probed via event-driven simulations in three dimensions between two infinite parallel plates. A monodisperse system of “rough” inelastic hard ...

The present work concerns the orientation dynamics of anisotropic particles in viscoelastic °uids. A spheroidal geometry is taken as being representative of an anisotropic, axisymmetric particle, and the work is an ...

The study of granular materials has received a recent upsurge of interest in physics. This has been motivated by both the relevance of such flows to a wide range of industrial and geological processes, and by the realization ...