Accession Number : AD0622565

Title :   SOME PHYSICAL CONSIDERATIONS OF THE HYDRODYNAMIC STABILITY OF PARALLEL FLOWS OF A DUSTY GAS,

Corporate Author : PRINCETON UNIV N J DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Personal Author(s) : Liu,J. T. C.

Report Date : JUL 1965

Pagination or Media Count : 33

Abstract : Some of the physical implications of the stability of parallel flows of a dusty gas are studied. The energy balance of such a disturbed flow shows that the increase or decrease of the overall (gas plus particle) disturbance kinetic energy depends upon the relative magnitude of (1) energy dissipation due to the usual gas viscosity and augmented by the work done due to particle-gas interaction, and (2) energy conversion from the mean flow to the disturbances by both the gas and the particle Reynolds shear stresses. The viscous sublayer structure, where viscosity is known to be destabilizing, is deduced. It is shown that augmented phase shift of the gas velocity components, due to particle-gas interaction, tends to decrease the gas Reynolds shear stress but is eventually offset by their relative magnitude increase.

Descriptors :   (*GAS FLOW, STABILITY), (*AEROSOLS, FLUID DYNAMICS), SHEAR STRESSES, KINETIC THEORY, ENERGY, TURBULENCE, VISCOSITY, VORTICES, VELOCITY, MATHEMATICAL ANALYSIS, DUST

Distribution Statement : APPROVED FOR PUBLIC RELEASE