Modeling wet‐gas annular/dispersed flow through a venturi

Abstract

A theoretical model for gas ᎐ liquid annularrdispersed flow through a ®enturi meter is reported. It is based on an earlier model de®eloped for ®enturi scrubbers. Changes implemented are based on new research and on the different physics between the two cases. The predictions of the model ha®e been tested using information from recent experiments on ®enturi meters employed for measuring wet-gas flows with a liquid ®ol-ume fraction up to 10%. The model gi®es good predictions with appropriate ®alues of a small set of input ®ariables.

Behaviour of an annular flow in the convergent section of a Venturi meter

“…Two and three-dimensional calculations of this two phase flow can be considered to take into account the gas liquid interactions of the core region (droplets) [4], but even if recent developments exist to simulate the flow phenomena in the liquid film region (Volume Of Fluid (VOF) [5] or level set techniques [6]), the high grid refinement needed in the three spatial directions does not permit to follow this modelling option. An alternative approach initially developed for a Venturi scrubber has been followed by Azzopardi and coworkers [7]. They use a one-dimensional approach to describe the momentum exchanges between the gas and the liquid phase along the Venturi meter.…”

The hydrodynamics of liquid–liquid upflow through a venturimeter

“…Several theoretical studies (Boyer and Lemonnier, 1996;Werven et al, 2003;Rosa and Morales, 2004) and experimental researches (Silva et al, 1991;Rosa and Morales, 2004;Steven, 2002;Zhang et al, 2005) have been carried out and a number of correlations have been proposed to estimate gas-liquid flow from pressure drop measurements across a venturimeter. The studies include air-water flows (Soubiran and Sherwood, 2000;Gaston and Reizes, 2001), oil-gas flows 2005) and wet gas metering (Steven, 2002;Xu et al, 2003).…”

Graphical Analysis of the Performance of Venturi Scrubbers for Particle Abatement. Part I: Rapid Collection Efficiency Evaluation

“…More recently, Azzopardi and his coworkers developed a more sophisticated modeling approach for simulating the gasliquid flow in venturi scrubbers and predicting the venturi pressure drop (Azzopardi et al 1991;Azzopardi 1992;Azzopardi et al 1999;van Werven et al 2003;Sun and Azzopardi 2003). Their approach provides an elegant insight into the mechanisms at work, accounting, inter alia, for the presence of liquid film on the venturi walls, continual atomization and re-deposition of the liquid on the walls, and boundary layer growth and separation.…”