Description
The movie shows experimental investigations on the spilling type breaking flow field produced by a hydrofoil positioned in a uniform current.
From the examination of the Laser Doppler Anemometer results downstream of the hydrofoil a flow field similar to a mixing layer, close to the breaking zone, and a flow field similar to a wake were found. The experiments were carried out were carried out in the hydraulic laboratory of the Department of Civil, Environmental, and, Building Engineering and Chemistry of the Polytechnic University of Bari, Italy, in a 24.4 m long 0.40 m wide Plexiglas channel with the sidewall height of 0.5 m. The velocity field was measured by using a backscatter, two-component four-beam fiber-optic LDA system. A 5W water cooled argon-ion laser, a transmitter, a 85mmprobe (focal length 310 mm, beam spacing 60 mm)and Dantec 58N40 FVA enhanced signal processor were used. The laser wave lengths are 488.0 nm and 514.5 nm.
Information and details on this research are available in the following papers:
Mossa M (2008) Experimental study of the flow field with spilling type breaking. Journal of Hydraulic Research 46(sup1): 81–86.
De Padova D, Mossa M and Sibilla S (2016) SPH numerical investigation of the velocity field and vorticity generation within a hydrofoil induced spilling breaker. Environmental Fluid Mechanics 16(1): 267–287.
De Padova D and Mossa M, Modelling fluid–structure interactions: a survey of methods and experimental verification. Proceedings of the Institution of Civil Engineers – Engineering and Computational Mechanics,
https://doi.org/10.1680/jencm.19.00014
