Journal ArticleDOI
Investigation of postflooding conditions in countercurrent gas–liquid flow
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In this paper, the authors studied the post-flooding situation in air-water countercurrent flow in a tube of 0.025 m internal diameter with smooth inlet and outlet conditions for the two phases.Abstract:
Systematic experiments were conducted to study the postflooding situation in air–water countercurrent flow in a tube of 0.025 m internal diameter with smooth inlet and outlet conditions for the two phases. The downflow rate of water and the pressure gradient were measured over a range of flow rates for test-section lengths of 0.6, 1.2 and 2.0 m. Additional experiments were conducted with increasing and decreasing water flow rates at a constant air flow rate. The length of the test section or the way the flooding point was approached did not significantly affect the onset of flooding. The data show that, as the gas flow rate is increased, the pressure gradient can fall significantly in the postflooding situation due to depleting the downflow rate of liquid. Dimensionless correlations are proposed to calculate the downflow rate and the pressure gradient given for overall flow parameters.read more
Citations
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Journal ArticleDOI
Computational Approach to Characterize the Mass Transfer between the Counter‐Current Gas‐Liquid Flow
TL;DR: In this article, a three-dimensional CFD model that considers the local absorption and the local momentum transfer mechanism is developed for a film flow on a small plate with a counter-current gas flow.
Journal ArticleDOI
The effects of surface tension on flooding in counter-current two-phase flow in an inclined tube
Deendarlianto,Akiharu Ousaka,Indarto,Akira Kariyasaki,Dirk Lucas,Karen Vierow,Christophe Vallée,Kevin Hogan +7 more
TL;DR: In this article, the effects of surface tension on flooding in counter-current two-phase flow in an inclined tube were investigated and an empirical correlation for flooding velocities was proposed that includes functional dependencies on surface tension and tube inclination.
Journal ArticleDOI
Theoretical prediction of flooding velocity in an inclined tube based on viscous Kelvin-Helmholtz instability
TL;DR: In this paper, the authors performed the viscous Kelvin-Helmholtz instability analysis with a simplified one-dimensional model and found that surface tension acts as a stabilizing force and cannot be ignored.
Journal ArticleDOI
SUCTION PIPE DESIGN CRITERION FOR R-134a REFRIGERATORS TO SECURE OIL RETURN TO COMPRESSOR
TL;DR: In this paper, a Pyrex glass tube was used to measure gas velocities for the counter current flow limitation point and the flow reversal point and an empirical oil return criterion was also verified using a refrigerator test apparatus and refrigerant.
Journal ArticleDOI
Multi-scale study of wet pressure drop model for a novel structured wire gauze packing
TL;DR: In this paper, a novel type of structured wire gauze packing was designed, investigated, and compared with initial packings to improve hydrodynamic performances, especially in reducing the wall flow phenomenon and lowering pressure drop.
References
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Journal ArticleDOI
Flooding in tubes and annuli
TL;DR: In this article, a new flooding correlation is presented which solves the obvious contradiction between the Wallis correlation and the study by Pushkina and Sorokin concerning the scaling question at zero penetration of liquid.
Journal ArticleDOI
Flooding and churn flow in vertical pipes
TL;DR: In this paper, a 32 mm dia vertical pipe with various forms of liquid outlet, namely a porous wall, a tapered outlet, and a square-edged outlet, was used to investigate the effect of churn flow on the penetration rate.
Journal ArticleDOI
Behaviour of liquid films and flooding in counter-current two-phase flow—Part 1. Flow in circular tubes
S. Suzuki,Tatsuhiro Ueda +1 more
TL;DR: In this paper, experimental results were presented on the flooding gas velocity in tubes over a wide range of parameters, including tube diameter, tube length, liquid flow rate, liquid viscosity and surface tension.
Journal ArticleDOI
The effect of viscosity on the flooding conditions in wetted wall columns
TL;DR: The gas velocities for flooding in a wetted wall column have been measured as a function of liquid viscosity and flow rate as mentioned in this paper, and they were found to be somewhat higher than those predicted by D avidson and S hearer.
Journal ArticleDOI
Theoretical investigation of the diameter effect on flooding in countercurrent flow
TL;DR: In this article, the CFDS-FLOW3D computational fluid dynamics code is used to determine the force exerted on a standing wave by gas flowing over it, and it is found that the drag on the wave is mainly due to the pressure variation around it and that it is a strong function of the channel dimensions.
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