Conditions for complete phase separation in an impacting tee junction at various inclinations of the outlet arms

Mohamed, M.A.; Soliman, H.M.; Sims, G.E.

doi:10.1016/j.ijmultiphaseflow.2012.07.001

Cited by 29 publications

(10 citation statements)

References 22 publications

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“…For stratified flow approaching along a horizontal pipe, liquid free gas can be extracted through a branch can be impaired if a hydraulic jump occurs in the liquid layer . A variant on this was presented by Mohamed et al who used an impacting junction, both outlets perpendicular to the inlet and determined the conditions at which there was no carry over of liquid from the gas‐rich outlet. They examined the effect of the inclination of the outlets.…”

Section: Introductionmentioning

confidence: 99%

Phase separation of gas–liquid two‐phase stratified and plug flows in multitube T‐junction separators

et al. 2016

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Using air and water as the working fluids, phase separation phenomena for stratified and plug flows at inlet were investigated experimentally, at a simple T‐junction and specifically designed multitube T‐junction separators with two or three layers. The results show that for these two flow patterns the separation efficiency of the two phases for any multitube T‐junction separator is much higher than that of the simple T‐junction. Increasing the number of connecting tubes in the multitube T‐junction separator can increase the separation efficiency. Generally, for stratified flow, complete separation of the two phases can be achieved by the two‐layer multitube T‐junction separator with five or more connecting tubes and by the three‐layer separator; increasing the gas flow rate, the liquid flow rate, or the mixture velocity under plug flow is detrimental to phase separation with a drop in peak separation efficiency. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2285–2292, 2017

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Section: Introductionmentioning

confidence: 99%

Phase separation of gas–liquid two‐phase stratified and plug flows in multitube T‐junction separators

et al. 2016

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“…Details on these works can be found in Section 2.2.1. Mohamed et al (2012) managed to obtain full-phase separation at 200-kPa (abs) pressure using a 13.5-mm diameter single equal-sided impacting tee. In their work, the authors reported inlet velocities of liquid and gas for which full separation of phases was obtained at multiple inclination angles of the outlet branches, θ = 2.5°, 7.5°, 15°, 30°, 60°, 75° and 90° while keeping the inlet horizontal.…”

Section: Studies On Full-phase Separation With Single Impacting Tee Junctionsmentioning

confidence: 99%

“…In order to achieve a desirable degree of separation at a wider range of operating conditions, multiple junctions are needed (Mohamed et al, 2012). Table 2.3 shows a summary of the currently available studies on two-phase flows through multiple tee junctions.…”

Section: Studies On Multiple Tee Junctionsmentioning

confidence: 99%

Experimental investigation of gas-liquid separation with a new combined impacting junction

Mohamed

Soliman

2022

Experimental Thermal and Fluid Science

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A novel system of combined impacting tee junctions was designed to generate partialand full-phase-separation data for air-water two phase flow. The system consisted of three horizontal and four vertical equal-sided impacting tee junctions of internal diameter 13.5 mm, having one (horizontal) inlet and two vertical (top and bottom) outlets. The experiments were conducted at a nominal pressure of 200 kPa (abs) and near-ambient temperature.For the full-phase-separation experiments, the inlet gas and liquid superficial velocity ranged from 0.2 to 39 m/s and from 0.0009 to 0.72 m/s, respectively. These conditions fell in the annular, slug and plug flow regimes. It was found that with the present system, the limiting conditions (gas and liquid inlet superficial velocities, J G1 and J L1 , respectively) of full phase separation are almost double those of a system of three impacting junctions and quadruple those of a single impacting tee junction system.

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“…Almost similar observations of phase split in T-junction (as mentioned above for 11 mm diameter) are found for the conduit-diameter of 15 mm and 20 mm, as can be seen in Figs. 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27 Figs. 13, 19, 25, it is found that the tendency of phase split decreases as the diameter increases.…”

Section: Effect Of Inlet-vf and Liquid Properties On The Phase Split mentioning

confidence: 99%

“…An experimental study was performed, and correlations were developed by Conte [19] for the characterization of gas-liquid flow splitting in T-junctions. Mohamed et al [20] experimentally inspected the ability of a single impacting T-junction to perform as a full phase separator for gas-liquid two-phase flow. A simple correlation was developed for the accurate prediction of the data in terms of magnitude and trend.…”

Section: Introduction and Literature Surveymentioning

confidence: 99%

Identification of the influencing input parameters and their effects on the split dynamics of liquid–liquid two-phase mixture through T-junction: a numerical analysis

Kumar

Ghosh

2020

J Braz. Soc. Mech. Sci. Eng.

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Split dynamics of the liquid-liquid two-phase mixture through horizontal T-junction is numerically investigated by varying the parameters like inlet-volume-fraction, inlet-mixture-velocity, liquid pair, and conduit-diameter. Ultimately, the effects of these parameters on the said dynamics are extracted. 3D steady-state numerical solutions are achieved by adopting a Finite Volume-based Eulerian Multi-Fluid VOF model. To simulate the turbulence, SST k-w model is used. Before producing the results, the adopted numerical methodology is successfully validated with the results available in the literature. Composition of the liquid-liquid two-phase mixture obtained along the branch and run arms differ from that along inlet arm. Again, that composition along the branch and run arm are also different from each other. Inertia imbalance is found as the most vital factor to influence the dynamics of phase split. More split is obtained for the mixture with high density-difference between the component liquids. No significant phase split is found for a liquid pair when any one of them has high viscosity. Depending on the conduit-diameter, liquid pair, and inlet-mixture-velocity, a critical inlet-volume-fraction (> 0.5) is found where no split occurs, and the phenomenon of phase split is reversed at the critical inlet-volume-fraction. As the inlet-velocity increases, critical inlet-volume-fraction increases for T-junction having a smaller conduit-diameter, but it increases very slowly for a larger conduit-diameter. With the increment in inlet-velocity, effective phase split reduces for smaller conduit-diameter, and it slightly increases for a larger conduit-diameter. The intensity of the split decreases with the increment in conduit-diameter. Larger critical inlet-volume-fraction is found for a larger conduit-diameter.

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Conditions for complete phase separation in an impacting tee junction at various inclinations of the outlet arms

Cited by 29 publications

References 22 publications

Phase separation of gas–liquid two‐phase stratified and plug flows in multitube T‐junction separators

Phase separation of gas–liquid two‐phase stratified and plug flows in multitube T‐junction separators

Experimental investigation of gas-liquid separation with a new combined impacting junction

Identification of the influencing input parameters and their effects on the split dynamics of liquid–liquid two-phase mixture through T-junction: a numerical analysis

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