Numerical modeling of cavitating flows for simple geometries using FLUENT V6.1

Palau-Salvador, Guillermo; González-Altozano, Pablo; Arviza-Valverde, Jaime

doi:10.5424/sjar/2007054-269

Cited by 17 publications

(10 citation statements)

References 22 publications

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“…5, the calculated vapor fraction on the axis of the nozzle at 100 and 150 °C are plotted and compared with the references [9,10]. 5, the calculated vapor fraction on the axis of the nozzle at 100 and 150 °C are plotted and compared with the references [9,10].…”

Section: Simulation Results For Nozzlementioning

confidence: 99%

A thermodynamic cavitation model applicable to high temperature flow

Liu

et al. 2011

Therm sci

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Cavitation is not only related with pressure, but also affected by temperature. Under high temperature, temperature depression of liquids is caused by latent heat of vaporization. The cavitation characteristics under such condition are different from those under room temperature. The paper focuses on thermodynamic cavitation based on the Rayleigh-Plesset equation and modifies the mass transfer equation with fully consideration of the thermodynamic effects and physical properties. To validate the modified model, the external and internal flow fields, such as hydrofoil NACA0015 and nozzle, are calculated, respectively. The hydrofoil NACA0015's cavitation characteristic is calculated by the modified model at different temperatures. The pressure coefficient is found in accordance with the experimental data. The nozzle cavitation under the thermodynamic condition is calculated and compared with the experiment.

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Section: Simulation Results For Nozzlementioning

confidence: 99%

A thermodynamic cavitation model applicable to high temperature flow

Liu

et al. 2011

Therm sci

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“…A reference model for the pressure difference driven formulations is the Singhal model which is based on Rayleigh-Plesset bubble growth analysis. It was also used for depressurized flows [9]. However for the last the Hertz-Knudsen (HK) formulation is more frequently used.…”

Section: Pressure Difference Based Modelsmentioning

confidence: 99%

Initially sub-cooled liquid flashing flow CFD modeling: closure parameters for a non-symmetric interfacial area density formulation

Sampedro

Nemer

2021

E3S Web Conf.

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A bubble to droplet transition non-symmetric interfacial area density formulation was developed for flash boiling nozzles CFD modeling. This formulation is used in a two fluid Euler- Euler modeling with a thermal phase change model. The regime transition formulation is based on the number of bubbles density and number of droplet density values. The first affects mainly the flow regime close to the nozzle throat and the second parameter affects mainly the flow close to the outlet. The physical factors affecting the calibration values of these parameters are analyzed in this paper with the aim of defining appropriate closure models. The analysis is done using experimental data available in literature. The comparison is done on the mass flow rate and the nozzle outlet velocity. It appears that the number of bubbles density is related to the inlet sub -cooling conditions and that the number of droplets density is affected by the outlet pressure and Reynolds number.

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“…Palau-Salvador et al [99] performed numerical predictions of cavitation flows based on CFD for simple geometries, such as orifices, nozzles and Venturi systems, using the commercial CFD code FLUENT 6.1.…”

Section: Modelingmentioning

confidence: 99%

A critical review of the current technologies in wastewater treatment plants by using hydrodynamic cavitation process: Basic principles

Mancuso¹

2019

ACE

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In the last years, hydrodynamic cavitation (HC) was increasingly used for a variety of applications in the field of wastewater treatment, ranging from biological applications (i.e. cells disruption) to chemical reactions such as oxidation of organic, bio-refractory and toxic pollutants in aqueous effluents. HC is induced in fluids by subjecting them to velocity variations due to the presence of constrictions in the flow. This process involves the formation, growth, implosion and subsequent collapse of micro-bubbles, occurring in extremely small intervals of time and releasing large magnitudes of energy over a very small location. In this paper, the vast literature on HC is critically reviewed, focusing on the basic principles behind it, in terms of process definition and analysis of governing mechanisms of both HC generation and pollutants degradation. The influence of various parameters on HC effectiveness was assessed, considering fluid properties, construction features of HC devices and technological aspects of processes. The synergetic effect of HC combined with chemicals or other techniques was discussed. An overview of the main devices used for HC generation and different existing methods to evaluate the cavitation effectiveness was provided. Knowledge buildup and optimization for such complex systems from mathematical modeling was highlighted.

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Numerical modeling of cavitating flows for simple geometries using FLUENT V6.1

Cited by 17 publications

References 22 publications

A thermodynamic cavitation model applicable to high temperature flow

A thermodynamic cavitation model applicable to high temperature flow

Initially sub-cooled liquid flashing flow CFD modeling: closure parameters for a non-symmetric interfacial area density formulation

A critical review of the current technologies in wastewater treatment plants by using hydrodynamic cavitation process: Basic principles

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