Experimental investigation of two-phase slug flow splitting at a micro impacting T-junction

Chen, Jinfang; Wang, Shuangfeng; Zhang, Xinqiang; Ke, Hongfeng; Li, Xuanyou

doi:10.1016/j.ijheatmasstransfer.2014.11.015

Cited by 24 publications

(6 citation statements)

References 33 publications

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“…In comparison with the results of Azzopardi et al (1986a) with hydraulic diameter of 31.8-mm (macro-channel) and Elazhary and Soliman (2012) with hydraulic diameter of 3.4-mm (mini-channel), Chen et al (2014) phase redistribution was less severe with their testsection of 0.5 mm × 0.5 mm micro-channel. Chen et al (2015) used the same experimental set-up as Chen et al (2014). The gas and liquid inlet superficial velocities were varied from 0.36 to 2.4 m/s and 0.1 to 0.9 m/s, respectively, which corresponded to slug flow regime.…”

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

confidence: 99%

“…The authors introduced two parameters in their work. One is the separation efficiency, η = |F G3 -F L3 |, which was formulated by Chen et al (2015) to evaluate the separation effect, where a low η indicates uniform phase redistribution in the two outlets, and the second is the influencing degree, I, which was introduced to quantify the effect of branch channel diameter on phase redistribution. The parameter I was defined as:…”

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

confidence: 99%

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

confidence: 99%

Section: Studies On Partial-phase Separation With Single Impacting 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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“…But when the fraction of gas taken off is between 0.5 and 0.9, the fraction of liquid taken off of by a rectangular cross section is less than that in circular and square ones. This is also due to the larger aspect ratio of the rectangular cross section, which, because of capillary action and surface tension, affects the secondary flow of the phase split and causes more liquid to be absorbed near the interior angles 3.6 Predictive model of phase split [31] and Azzopardi et al [32]. For the prediction model of the dividing T-junction, the application of the model proposed by Seeger et al [33] was wide enough to predict the behavior of phase split under a variety of flow patterns.…”

Section: Effects Of Different Channel Cross Sections On Phase Split Fmentioning

confidence: 99%

Phase split characteristics of slug and annular flow in a dividing micro-T-junction

Zhou

et al. 2017

Experimental Thermal and Fluid Science

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The characteristics of slug and annular gas-liquid two-phase flow when moving through a rectangular micro-channel dividing T-junction were investigated with experiments focusing on the relationships between the phase split and the two-phase superficial velocity, liquid surface tension, and liquid effective viscosity. The effects of the pipe sizes and pipe cross section shapes on phase split were compared and analyzed. Phase split was tested using a 100 × 800 μm rectangular dividing micro-T-junction. Air was used as the gas medium and the liquid mediums were water, 0.01% SDS solution, 0.5% SDS solution, 0.1wt%PAAm, 0.25wt%PAAm, and 0.5wt%PAAm. Results showed that whether the inlet flow pattern was slug or annular flow, the liquid taken off from side branch at the dividing T-junction decreases with an increase in liquid superficial velocity and that there is little effect of inlet gas flow rate on the liquid taken off. It was also found that the liquid taken off from side branch decreases with a decrease in liquid surface tension and increases with an increase in liquid effective viscosity. When results were compared to those from studies using channels of other diameters, it was seen that the phase split of the slug flow was similar at different sized dividing T-junction, while the phase split of annular flow varied at different pipe sizes. It was also seen that the phase split characteristics of a dividing micro-T-junction are dependent on the aspect ratios of the channel's cross section. A predictive model of phase split characteristics studied in this investigation was formulated with the regression analysis of the experimental data and verified by calculations showing little error.

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“…However, equal flow distribution over the different channels can be challenging, especially for gas-liquid flow. [20][21][22] Multiple factors (e.g. fabrication errors, clogging, light failure) can cause flow maldistribution.…”

Section: Introductionmentioning

confidence: 99%

A sensitivity analysis of a numbered-up photomicroreactor system

et al. 2017

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Experimental investigation of two-phase slug flow splitting at a micro impacting T-junction

Cited by 24 publications

References 33 publications

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

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

Phase split characteristics of slug and annular flow in a dividing micro-T-junction

A sensitivity analysis of a numbered-up photomicroreactor system

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