Vorticity Transport by Electromagnetic Forces
Abstract
The principal focus of this work is the use of the Lorentz force to alter the turbulence in the flow or, more generally, the vorticity. An analysis of the Lorentz force in a conducting fluid flowing over an array of magnets and electrodes predicts the amplitude of the vorticity transport in the boundary layer due to the Lorentz force field. These predictions are used to estimate the performance of an electromagnetic array for sea water flows at several meters per second. This investigation demonstrates that an analysis of the Lorentz force distribution in a flow above a flat plate shows that many of the features of the fields and their effect on the flow can be deduced without solving the governing equations. Moreover, many fundamental conclusions can be derived from order of magnitude scaling analysis and symmetry arguments. The effect of the Lorentz force on the flow is evaluated by equating the curl of the Lorentz force to the transport of vorticity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 02, 1998
- Accession Number
- ADA345445
Entities
People
- Peter J. Hendricks
Organizations
- Naval Undersea Warfare Center