Accession Number : ADD017340

Title :   Electromagnetically Activated Compliant Wavy-Wall.

Descriptive Note : Patent Filed 27 Aug 93, patented 25 Oct 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Nadolink, Richard H

Report Date : 25 Oct 1994

Pagination or Media Count : 9

Abstract : Electromagnets are disposed in an elastomeric coating affixed to a body exposed to a fluid. Controllable magnetic forces created by the electromagnets produce a wavy-wall configuration in the surface of the coating which may be static, dynamic, or static in part and dynamic in part, and which interfaces with the fluid to controllably alter noise, turbulence and drag characteristics of the body mechanically. Electrodes may be fixed on the surface of the coating to produce electric force fields for interacting with the magnetic fields and the wavy-wall, to produce magnetobydrodynamically generated Lorentz forces which controllably further alter noise, turbulence and drag characteristics of the body. (MM)

Descriptors :   *ELECTROMAGNETS, *FLUID MECHANICS, *MAGNETOHYDRODYNAMICS, *PATENTS, MAGNETIC FIELDS, ELASTOMERS, BOUNDARY LAYER, TURBULENCE, ELECTRIC FIELDS, ELECTRICAL CONDUCTIVITY, COATINGS, NOISE, DRAG, PIEZOELECTRIC TRANSDUCERS

Subject Categories : Electricity and Magnetism
      Fluid Mechanics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE