scholarly journals CFD NUMERICAL AND EXPERIMENTAL INVESTIGATION OF TWO-PHASE FLOW DEVELOPMENT AFTER AN EXPANSION DEVICE IN A HORIZONTAL PIPE

2020 ◽  
pp. 307-323
Author(s):  
Raid Ahmed MAHMOOD ◽  
David BUTTSWORTH ◽  
Ray MALPRESS ◽  
Ahmad SHARİFİAN-BARFOROUSH
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Development

Experimental investigation on the initiation and flow development of gas-liquid slug two-phase flow in a horizontal pipe

2017 ◽  
Vol 81 ◽  
pp. 93-108 ◽  
Author(s):  
Okto Dinaryanto ◽  
Yosephus Ardean Kurnianto Prayitno ◽  
Akmal Irfan Majid ◽  
Akhmad Zidni Hudaya ◽  
Yusnanda Agus Nusirwan ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Liquid Slug ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Development

scholarly journals Two-Phase Flow Development of R134a in a Horizontal Pipe: Computational Investigation

2021 ◽  
Vol 39 (5) ◽  
pp. 1532-1540
Author(s):  
Raid A. Mahmood ◽  
Khalid Saleh ◽  
Veyan A. Musa ◽  
Enass Massoud ◽  
Ahmad Sharifian-Barforoush ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Three Dimensional ◽  
Phase Flow ◽  
Vapor Quality ◽  
Computational Investigation ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Development ◽  
Flash Tank ◽  
Region Length

To improve the performance of vapor compression refrigeration systems that use vertical gravitational flash tank separators, the liquid separation efficiency of the vertical gravitational flash tank separator requires to be approved. To approach this improvement, the two-phase flow development and its behavior after the expansion device need to be investigated and predicted. For thus, this paper presents a three-dimensional computational investigation of the two-phase flow development of R134a after the expansion device in a horizontal pipe. Computational Fluid Dynamic (CFD) was used to predict the two-phase development and its behavior in the horizontal pipe. ANSYS 16.2 program was used to generates the geometry of the three-dimensional horizontal pipe of 2 meters long and 25 mm inner diameter. The hexahedral mesh was generated and it is assessed to obtain the optimum mesh size and number. Eulerian-Eulerian two-phase model was used with k-ɛ turbulence model. R134a was used as a working fluid in the horizontal pipe utilizing four different inlet diameters: 12, 12.5, 25, and 50.0 mm. Mass flux and vapor quality have been changed from 288 to 447 kg/m2.s and from 10 to 20% respectively. Results were validated against experimental results from the literature and revealed that the separation region length is affected by the initial phase velocities, inlet vapor quality, and inlet tube diameter. An empirical correlation to predict the expansion region length is proposed as a function of Froude, Webber, and Lockhart-Martinelli numbers.

Pressure Drop for Oil-Gas Two-Phase Flow Through Straight Horizontal Pipe

2007 ◽  
Author(s):  
Wenhong Liu ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Kai Lin ◽  
Long Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas
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