Hydrodynamic Cavitation Reactors: A State of the Art Review

Gogate, Parag R.; Pandit, Aniruddha B.

doi:10.1515/revce.2001.17.1.1

Cited by 242 publications

(113 citation statements)

References 56 publications

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“…In addition, modeling can support advances in designing and upscaling reactors using ultrasound. This is clearly shown in the work of Keil [5][6][7][8], Hoffman [9], Gogate and Pandit [10][11][12] and more recently in Jamshidi [13].…”

Section: Introductionmentioning

confidence: 78%

Investigation of design parameters in ultrasound reactors with confined channels

Jordens

Honings

Degrève

et al. 2013

Ultrasonics Sonochemistry

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This paper presents a three-dimensional numercial simulation of sonochemical degradation upon cavitational activity. The model relates the simulation of the acoustic pressure distribution to the sonochemical reaction rate. As a case study, the thermal degradation of carbon tetrachloride during sonication is studied in a tubular milliscale reactor. The model is used to optimize the reactor diameter, ultrasound frequency and power dissipated to the ultrasound transducers. The results indicate that multiple transducers at a moderate power level are more efficient than one transducer with high power level. Furthermore, the average cavity volume fraction is proposed as a reaction independent parameter to estimate the optimal reactor design. Within the results obtained in this paper, it appears possible to optimise reactor design based on this parameter.

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Section: Introductionmentioning

confidence: 78%

Investigation of design parameters in ultrasound reactors with confined channels

Jordens

Honings

Degrève

et al. 2013

Ultrasonics Sonochemistry

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“…The rotating discs are patterned with slots and bars that at the same time force the fibres from the centre of the refiner to the periphery and grind the chips as they pass over them. Research indicate that the passing of the slots over the fibres give rise to cavitation [4], which contribute to the fibrillation of the fibres [5]. Cavitation is however undesirable despite its positive properties, as it also gives rise to significant mechanical wear and fatigue on the refiner plates.…”

Section: Disc Refinersmentioning

confidence: 99%

“…As the liquid passes through the venturi the flow speed increases and the static pressure reduces as both mass and energy must be conserved in the passage through the nozzle. Hydrodynamic cavitation can therefore be induced at otherwise ambient conditions and represent the most energy efficient way of inducing cavitation [5].…”

Section: Modelling and Measuring Cavitationmentioning

confidence: 99%

An Automatic Method for Optimizing Venturi Shape in Cavitation Flows

Shankar¹,

Lundberg²,

Frenander³

et al. 2017

Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17)

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-In order to lower the energy consumption of the fibrillation stage for the pulp and paper industry, a new technology need to be innovated and developed. The current research work deals with a new innovative concept based on creating cavitation in the pulp flow. A venturi nozzle is designed and optimized, where hydrodynamic cavitation is achieved by the so called Venturi effect. This paper focuses on the development of an automatic method for venturi shape optimization. The process of cavitation is hard to control and can cause high mechanical wear, therefore an optimization study of the venturi shape is performed with two main objectives. Firstly, to achieve cavitation that is sustained for as long as possible downstream and secondly to avoid cavitation at the walls. The developed method is a type of two-level optimization based on neural networks and evolutionary optimization. A number of simulations are executed and the optimization is then performed on a solver approximation instead of the real solver, which considerably reduces computation time. The obtained results show the optimal venturi configuration and the relative importance of each shape parameter. The optimal configuration is a clear improvement of the baseline configuration and an improvement also compared to all of the tested samples, thereby validating the optimization method.

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“…20 Meanwhile, hydrodynamic cavitation which exhibited similar effect as acoustic cavitation 21 was commonly used to intensify various physical/chemical process operations. 22 Both cavitations underwent three steps, which are bubble generation, bubble collapse and energy release. The collapse of bubbles created high energy release that can effectively break the cluster of nanaoparticles and assist in deagglomeration process of particle clusters.…”

Section: Introductionmentioning

confidence: 99%