Accession Number : AD0736188

Title :   Response Characteristics of the Neutrally Buoyant Float.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s) : Voorhis,Arthur D.

Report Date : DEC 1971

Pagination or Media Count : 77

Abstract : The response characteristics of the neutral buoyant vertical current meter are discussed primarily from a theoretical point of view. Computations are presented to illustrate the useful range and limitations of present instruments. Three aspects of the response are considered separately: rotational, vertical, and tilting due to vertical shear. The rotational response at low frequencies is poor only for very weak vertical currents due to viscous drag. At high frequencies the response is uniformly limited by the moment of inertia of the instrument. The vertical response is best in neutrally stable water. In highly stratified water, on the other hand, the response deteriorates for all frequencies because of the small relative flow past the instrument. In all cases it is limited at high frequencies because of instrument inertia. (Author)

Descriptors :   (*OCEANOGRAPHIC EQUIPMENT, FLOWMETERS), (*FLOWMETERS, PERFORMANCE(ENGINEERING)), (*OCEAN CURRENTS, MEASUREMENT), FLOATS, STABILITY, ROTATION, BUOYANCY, DRAG, TORQUE, NUMERICAL ANALYSIS

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE