The shedding process of the Kármán vortices at the trailing edge of a 2D hydrofoil at high Reynolds numbers is investigated. The focus is put on the effect of the cavitation on the vortex street morphology. A direct insight is also provided on the role of the structural vibration on the cavitation inception. The shedding frequency, derived from the measurement of flow induced vibration, is foun...

Cryogenic cavitation affects the operation of liquid propulsion systems during first phase a launch. Its effects within orifices or turbopumps can range from mild instabilities to catastrophic damages structures, jeopardizing launch itself. Therefore, ensure proper designing systems, phenomena cannot be neglected. Although hydrodynamic has been studied for decades, impact nature fluid sparsely ...

Residual biomass from agri-food production chain and forestry are available in huge amounts for further valorisation processes. Delignification is usually the crucial step of biofuels by fermentation as well conversion cellulose into high added-value compounds. High-intensity ultrasound (US) hydrodynamic cavitation (HC) have been widely exploited effective pretreatment techniques particular rec...

The work is a study of the patterns jet-cavitation air flows when flowing around high-speed passenger train. On basis theoretical studies, forces resistance (frontal and near-wall) external environment to movement train, influence cavitation currents on near-wall layer, current generated during rolling stock, both as whole each car are determined, flow from solid particles lying underlying surf...

In this study, ANSYS-FLUENT packages are employed to simulate the turbulent flow around DTMB4119 propeller in open water conditions. In order to form a mesh, the multiple reference frame (MRF) methodology is used. The results are compared with the experimental results and a good conformity is obtained, which endorses numerical simulation. Furthermore, the  turbulence model is used, which is sup...

The conditioning of biosolids is a growing issue due to extremely large increases in production of this waste, escalating disposal costs and inefficient use of produced methane. One approach to improve biosolids utilization is treating waste activated sludge (WAS) before anaerobic digestion to enhance digestion, increase methane production and lower biosolids production. Cavitation is the dynam...

The present work gives an in depth discussion related to the development of a hybrid advanced oxidation reactor, which can be effectively used for the treatment of various types of water. The reactor is based on the principle of intensifying degradation/disinfection using a combination of hydrodynamic cavitation, acoustic cavitation, ozone injection and electrochemical oxidation/precipitation. ...

Ultrashort lasers are typically utilized for tissue dissection by sequential application of tightly focused beam along a scanning pattern. Each pulse creates a small (on the order of 1μm) zone of multiphoton ionization (optical breakdown). At energies exceeding vaporization threshold cavitation bubble is formed around the focal volume. A continuous cut is formed if the rupture zones produced by...

Transparent biological tissues can be precisely dissected with ultrafast lasers using optical breakdown in the tight focal zone. Typically, tissues are cut by sequential application of pulses, each of which produces a single cavitation bubble. We investigate the hydrodynamic interactions between simultaneous cavitation bubbles originating from multiple laser foci. Simultaneous expansion and col...