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Numerical investigation and analysis of a dispersed two-phase flow across a single rigid cylinder
Last modified: 2018-05-04
Abstract
The numerical simulation of interaction between cylindrical structures and two-phase flows is a major concern for industrial applications, especially where cross-flows may appear for example in heat exchangers.
In order to understand the phenomenon of vibrations induced by two-phase flows, many experiments were conducted with reduced-scale models using several simulant two-phase mixtures. In single-phase flow, the phenomenon has been characterized with dimensionless numbers. In the present work, the authors are interested in having the simplest configuration to study the influence of inlet parameters and fluid properties and consequently of two-phase flow dimensionless numbers .
In 1986, Inoue et al. pointed out different properties of a dispersed air/water flow around a single rigid cylinder for various inlet void fractions, velocities, and bubble to cylinder size ratios. Based on that study, we present a numerical analysis with a finite-volume CFD software dedicated to multi-phase flow. The two-fluid approach provides a satisfactory agreement between Inoue’s experiments and simulations. A numerical investigation is then proposed on the mixture influence. The sensitivity to surface tension, which might drastically change the vortex-shedding, is studied. Finally, the authors try to characterize this specific configuration with dimensionless numbers.
In order to understand the phenomenon of vibrations induced by two-phase flows, many experiments were conducted with reduced-scale models using several simulant two-phase mixtures. In single-phase flow, the phenomenon has been characterized with dimensionless numbers. In the present work, the authors are interested in having the simplest configuration to study the influence of inlet parameters and fluid properties and consequently of two-phase flow dimensionless numbers .
In 1986, Inoue et al. pointed out different properties of a dispersed air/water flow around a single rigid cylinder for various inlet void fractions, velocities, and bubble to cylinder size ratios. Based on that study, we present a numerical analysis with a finite-volume CFD software dedicated to multi-phase flow. The two-fluid approach provides a satisfactory agreement between Inoue’s experiments and simulations. A numerical investigation is then proposed on the mixture influence. The sensitivity to surface tension, which might drastically change the vortex-shedding, is studied. Finally, the authors try to characterize this specific configuration with dimensionless numbers.
Keywords
Single-cylinder, two-phase, numerical simulation
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