Accession Number : AD0740339

Title :   Some Aspects of Turbulence in Stratified Fluids.

Descriptive Note : Technical rept.,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD

Personal Author(s) : Long,Robert R.

Report Date : APR 1972

Pagination or Media Count : 31

Abstract : The report contains a discussion of some aspects of stratified, shearing flow. The importance of the subject for geophysical fluid mechanics is implicit in the turbulent nature of the atmosphere and oceans. Energy production and energy loss are considered first and an interpretation is given of the four basic terms in the energy equation. In particular, suggestions are made for separate processes in which disturbance energy is gained from the shear and lost to potential energy. The common layered structure of geophysical systems and stratified laboratory systems is described and two proposals are advanced that smooth density profiles may be unstable in the presence of turbulence. The suggestion is made that the density gradient in homogeneous layers may be dynamically important. The problem of the growth and maintenance of turbulence in stratified flows is presented. Evidence from laboratory experiments indicates that turbulence can be maintained at values of the Richardson number considerably in excess of 1/4. The paper concludes with some inferences and observations relative to turbulence in stratified flow. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, TURBULENCE), (*OCEAN CURRENTS, TURBULENCE), (*TURBULENCE, GEOPHYSICS), THERMOCLINES, TURBULENT BOUNDARY LAYER, CLEAR AIR TURBULENCE, MATHEMATICAL MODELS, NUMERICAL ANALYSIS

Subject Categories : Atmospheric Physics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE