Inviscid fluid in high frequency excitation field
Abstract
The influence of high frequency excitations (HFE) on a fluid is investigated. The response to these excitations is decomposed in two parts: 'slow' motion, which practically remains unchanged during the vanishingly small period tau, and 'fast' motion whose value during this period is negligible in terms of displacements, but is essential in terms of the kinetic energy. After such a decomposition the 'slow' and 'fast' motions become nonlinearly coupled by the corresponding governing equations. This coupling leads to an 'effective' potential energy which imparts some 'elastic' properties to the fluid and stabilizes laminar flows.
- Publication:
-
Acta Mechanica
- Pub Date:
- November 1984
- Bibcode:
- 1984AcMec..53..245Z
- Keywords:
-
- Inviscid Flow;
- Laminar Flow;
- Oscillating Flow;
- Shock Waves;
- Viscous Fluids;
- Wave Propagation;
- Degrees Of Freedom;
- Euler Equations Of Motion;
- Excitation;
- High Frequencies;
- High Reynolds Number;
- Kinetic Energy;
- Mach Number;
- Fluid Mechanics and Heat Transfer