Finger, bubble, tendril, spike - An essay on the morphology and dynamics of interfaces in fluids
Abstract
The morphology and the evolution of interfaces in flowing fluids are discussed in the framework of the characteristics of fluid motion and the pattern formation during fluid flow, emphasizing differences and similarities existing in a class of two-dimensional flows of rather idealized fluids. The flows considered encompass the basic instabilities of the Kelvin-Helmholtz, Rayleigh-Taylor, and Taylor-Saffman types; in these flows, the basic morphological entities that emerge on interfaces may take form of fingers, bubbles, tendrils, and spikes. The stability properties, both linear and nonlinear, of these structures are studied together with their interactions with other structures, contributing to the understanding of evolutionary patterns of flows starting from general initial conditions.
- Publication:
-
Fluid Dynamics Transactions
- Pub Date:
- 1987
- Bibcode:
- 1987FlDyT..13...25A
- Keywords:
-
- Advection;
- Flow Geometry;
- Fluid Flow;
- Kelvin-Helmholtz Instability;
- Stratified Flow;
- Vortex Sheets;
- Degrees Of Freedom;
- Euler Equations Of Motion;
- Interfacial Tension;
- Singularity (Mathematics);
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer