scholarly journals Investigation of Two-Phase Flow Mixing between Two Subchannels. 2nd Report. Verification of Fluctuating Pressure Model without Steady Pressure.

1997 ◽  
Vol 63 (613) ◽  
pp. 3107-3113
Author(s):  
Masanori TAKEMOTO ◽  
Tomoki KONDO ◽  
Takayasu INATOMI ◽  
Sinji SAKAI ◽  
Kazunori WAKAI ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Fluctuating Pressure ◽  
Steady Pressure ◽  
Flow Mixing

Large Eddy Simulation of Two-Phase Flow Pattern and Transformation Characteristics of Flow Mixing Nozzle

2019 ◽  
Vol 35 (5) ◽  
pp. 693-704
Author(s):  
Jin Zhao ◽  
Zhi Ning ◽  
Ming Lü
Keyword(s):  
Flow Pattern ◽  
Two Phase Flow ◽  
Velocity Ratio ◽  
Inertial Force ◽  
Surface Tension Force ◽  
Viscous Force ◽  
Phase Flow ◽  
Two Phase ◽  
Jet Breakup ◽  
Flow Mixing

ABSTRACTThe two-phase flow pattern of a flow mixing nozzle plays an important role in jet breakup and atomization. However, the flow pattern of this nozzle and its transformation characteristics are still unclear. A diesel-air injection simulation model of a flow mixing nozzle is established. Then the two-phase flow pattern and transformation characteristics of the flow mixing nozzle is studied using a numerical simulation method. The effect of the air-diesel velocity ratio, ratio of the distance between the tube orifice and nozzle hole and the tube diameter (H/D), and the diesel inlet velocity was studied in terms of the jet breakup diameter (jet diameter at the breakup position) and jet breakup length (length of the diesel jet from the breakup position to the nozzle outlet). The results show that the jet breakup diameter decreases with the decrease in H/D or the increase in the air-diesel velocity ratio and diesel inlet velocity. The jet breakup length increases first and then decreases with the increase in H/D and air-diesel velocity ratio; the trend of the diesel inlet velocity is complicated. In addition, a change in the working conditions also causes some morphological changes that cannot be quantitatively analyzed in the diesel-air flow pattern. The transition characteristics of the flow pattern are analyzed, and it is found that the main reason for the change in the flow pattern is the change in the inertial force of the air, surface tension force, and viscous force of diesel (non-dimensional Reynolds number and Weber number describe the transition characteristics in this paper). The surface tension force of diesel decreases and the viscous force of diesel and inertial force of air increase when the air-diesel velocity ratio increases or H/D decreases. However, the effects of the diesel surface tension force and viscous force effect are much smaller than that of the air inertial force, which changes the diesel-air flow pattern from a drop pattern to a vibration jet pattern, broken jet pattern, and then a chaotic jet pattern.

Investigation of two-phase flow mixing between two subchannels

2000 ◽  
Vol 29 (5) ◽  
pp. 412-426 ◽  
Author(s):  
Masanori Takemoto ◽  
Shinji Sakai ◽  
Kazunori Wakai ◽  
Isao Sumida ◽  
Tomoki Kondou ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Mixing

Investigation of two-phase flow mixing mechanism of a swirl burner using an electrostatic sensor array system

2013 ◽  
Vol 32 ◽  
pp. 14-26 ◽  
Author(s):  
Hao Zhou ◽  
Yu Yang ◽  
Kang Dong ◽  
Jian-bo Wu ◽  
Yong Yan ◽  
...  
Keyword(s):  
Sensor Array ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Swirl Burner ◽  
Two Phase ◽  
Flow Mixing

scholarly journals Simulation of Two Phase Flow Mixing Co – Current in T Junction Using Comsol

2020 ◽  
Vol 21 (1) ◽  
pp. 67-74
Author(s):  
Wallaa A. Noori ◽  
Dhiyaa A. Hussein AlTimimi ◽  
Bashar Jawad Kadhim
Keyword(s):  
Finite Element Method ◽  
Boundary Condition ◽  
Finite Element ◽  
Shear Rate ◽  
Two Phase Flow ◽  
Fluid Dynamic ◽  
Phase Flow ◽  
Cfd Model ◽  
Two Phase ◽  
Flow Mixing

The analysis, behavior of two-phase flow incompressible fluid in T-juction is done by using "A Computational Fluid Dynamic (CFD) model" that application division of different in industries. The level set method was based in “Finite Element method”. In our search the behavior of two phase flow (oil and water) was studed. The two-phase flow is taken to simulate by using comsol software 4.3. The multivariable was studying such as velocity distribution, share rate, pressure and the fraction of volume at various times.  The velocity was employed at the inlet (0.2633, 0.1316, 0.0547 and 0.0283 m/s) for water and (0.1316 m/s) for oil, over and above the pressure set at outlet as a boundary condition. It was observed through the program that the shear rate increased in the mixing area and begins to decrease after the mixing area, for the pressure suddenly decreases in the mixing area and after this area begins to decrease linearly with the length of the tube.

Phase Split in T-Junction Mini Channel – A Numerical Study

2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Rupak Kumar ◽  
Mithran N ◽  
Venkatesan Muniyandi
Keyword(s):  
Two Phase Flow ◽  
Separation Efficiency ◽  
Numerical Study ◽  
Internal Diameter ◽  
Phase Flow ◽  
Two Phase ◽  
Micro Scale ◽  
Flow Mixing ◽  
Macro Scale ◽  
Micro Reactors

Abstract Extracting natural gas and crude oil from deep wells requires a thorough understanding of multi phase flow phenomena. Designing of micro reactors employing different fluids requires similar understanding on a micro scale. Gas-Liquid two-phase flow mixing and separation commonly occur in such oil exploration and recovery on a macro scale and in case of micro fluid reactors in a micro scale. In this paper, two-phase flow mixing and separation is analysed for a horizontal channel with internal diameter 2.50 mm and a length of 202.5 mm. The numerical results obtained during two-phase flow mixing are validated with experimental results by employing image processing techniques. A numerical model is developed to study mixing and separation characteristics of slug flow regime. The separation efficiency of the T-junction partial separator for various superficial velocities, viscosity, surface tension and separation angles is analysed. The analysis will be useful for designing mini/micro reactors.

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