Journal
JOURNAL OF HYDRODYNAMICS
Volume 27, Issue 1, Pages 150-158Publisher
SPRINGER
DOI: 10.1016/S1001-6058(15)60467-X
Keywords
magnetofluids; Rosensweig effect; flow resistances; bed shear stresses; bottom velocities
Categories
Funding
- EC project HYDRALAB IV [261520]
- PRIN project HYDROCAR
- PON project SEAPORT - MIUR (Italy)
Ask authors/readers for more resources
A novel direct measurement strategy of bottom velocities and shear stresses based on the use of ferrofluids is presented. Such a strategy overcomes some of the limits of state-of-the-art instruments. A preliminary experimental campaign has been carried out in the presence of currents in steady flow conditions in order to test the effects of ferrofluid quantity and of the controlling permanent magnetic force. An alternating current (AC) circuit and a direct current (DC) conditioning circuit have been tested. For velocities larger than 0.05 m/s, the near-bottom velocity-output voltage calibration curve has a monotone parabolic shape. The sensitivity of the instrument is increased by a factor of 30 when the DC circuit is used.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available