A novel direct measurement strategy of wavenear-bed velocity and bottom shear stress based on the use offerrofluids is presented. The proposed methodology is aimed atovercoming some of the limits of state-of-the-art instruments,for use in presence of both surface waves and sediments.An inductive readout strategy is proposed to sense displacementsof the ferrofluid spike over the inductive circuit due to the flow.Experimental tests have been performed in a wave tank bothin hydrostatic conditions and in the presence of regular linearwaves corresponding to deep and intermediate water depthcases. Obtained results indicate the applicability of the proposedstrategy also in the presence of suspended load (either moderateor intense) and of a moderate bed load transport.

Measurement of wave near-bed velocity and bottom shear stress by ferrofluids

MUSUMECI, ROSARIA ESTER;ANDO', Bruno;BAGLIO, Salvatore;FOTI, Enrico
2015-01-01

Abstract

A novel direct measurement strategy of wavenear-bed velocity and bottom shear stress based on the use offerrofluids is presented. The proposed methodology is aimed atovercoming some of the limits of state-of-the-art instruments,for use in presence of both surface waves and sediments.An inductive readout strategy is proposed to sense displacementsof the ferrofluid spike over the inductive circuit due to the flow.Experimental tests have been performed in a wave tank bothin hydrostatic conditions and in the presence of regular linearwaves corresponding to deep and intermediate water depthcases. Obtained results indicate the applicability of the proposedstrategy also in the presence of suspended load (either moderateor intense) and of a moderate bed load transport.
2015
Bed velocity; bottom shear stress; inductive readout
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/3519
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