Abstract
The present study aims to compare cavitation models in predicting the flow in small-sized cavitating venturis. Three cavitation models, namely Schnerr and Sauer model, Zwart et al. Model and Singhal et al. Model have been compared under the mixture approach. Furthermore, the performance of this device has been assessed using the concept of exergy by quantifying the exergy losses accuring in its different parts. It is found that all models are capable of reproducing the physics of cavitation phenomena within the cavitating venturi. However, the Schnerr and Sauer model return higher values than the others model. It is also observed that most of the exergy losses occur in the converging and diverging parts of the venturi due to higher pressure and velocity gradients in these regions.
Highlights
A venturi tube is a low-pressure loss device which consists of three sequential parts: a convergent section, a throat and a divergent section
The present study aims to compare cavitation models in predicting the flow in small-sized cavitating venturis
Namely Schnerr and Sauer model, Zwart et al Model and Singhal et al Model have been compared under the mixture approach
Summary
A venturi tube is a low-pressure loss device which consists of three sequential parts: a convergent section, a throat and a divergent section. Due to their simple structure, venturi tubes are widely encountered in several industrial applications, including food processing, oil and gas industry, transportation vessels, agriculture, ... They are considered as a mature technology that can be used for a wide range of liquids, gases and steam They are suitable for passage of multiphase flows and wet gases. They allow a liquid flow rate to be fixed or locked independently of the downstream process conditions or fluctuations
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