Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Mechanics and Mechanical Engineering

1 2005

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Capillary Instability of a Streaming Fluid - Core Liquid Jet Under Their Self Gravitating Forces

Radwan A. E., Elmahdy E. E.

Mechanics and Mechanical Engineering

2005

Vol. 9, nr 2

131--145

The stability criterion of a fluid cylinder (density p) embedded into a different fluid (density p¹) is derived and discussed. The model is capillary unstable in the domain 0 p the model is purely unstable for all short and long wavelengths. In m≠0 modes the self-gravitating model is neutrally stable as p = p¹ and ordinary stable as p¹ < p but it is purely unstable as p¹ > p. The streaming destabilizing effect makes the self-gravitating instability worse and shrinks the stable domains. The stability analysis of the model under the combined effect of the capillary and self-gravitating forces is performed analytically and verified numerically. When p¹ < p the capillary force and the axial flow have destabilizing influences but the densities ratio p¹/p has a stabilizing effect on the gravitating instability. If p = p¹ the streaming is destabilizing but the capillary force is strongly stabilizing and could suppress the gravitational instability. When p¹ > p the capillary force improved the gravitational instability and created much domains of stability and moreover the instability of the self-gravitating force disappeared in several cases of axisymmetric disturbances.