This paper presents the predictions of the axial distribution of liquid level and interfacial level gradient (ILG) for nonuniform non-Newtonian liquid-gas flow in horizontal tubes. The non-Newtonian liquid is described using power-law model, while the model of Heywood and Charles for uniform non-Newtonian liquid-gas two-phase flow, which was developed based on one dimensional energy equation, is extended to describe nonuniform stratified flow by incorporating the effect of interfacial level gradient. Two different critical liquid levels are found from the energy equation and are adopted as boundary condition to calculate the interfacial level distribution upstream of the channel exit. The results from the model are compared with the published numerical and experimental data. The results show that the model can predict the interfacial level distribution and interfacial level gradient for nonuniform stratified flow. Low liquid velocity, low gas velocity and high liquid viscosity are beneficial for forming a nonuniform flow with interfacial level gradient. The difference between the analytical model and the published data is smaller than 10%.
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February 2014
Research-Article
Non-Newtonian Liquid-Gas Non-Uniform Stratified Flow With Interfacial Level Gradient Through Horizontal Tubes
Haiwang Li,
Haiwang Li
School of Mechanical and Aerospace Engineering,
Nanyang Technological University
,50 Nanyang Avenue
,Singapore 639798
National Key Lab. of Science
and Technology on Aero-Engines,
and Technology on Aero-Engines,
Beijing University of Aeronautics and Astronautics
,Beijing 100191
, China
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Teck Neng Wong,
Teck Neng Wong
1
e-mail: mtnwong@ntu.edu.sg
1Corresponding author.
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Fei Duan
Fei Duan
School of Mechanical and Aerospace Engineering,
Nanyang Technological University
,50 Nanyang Avenue
,Singapore 639798
Search for other works by this author on:
Haiwang Li
School of Mechanical and Aerospace Engineering,
Nanyang Technological University
,50 Nanyang Avenue
,Singapore 639798
National Key Lab. of Science
and Technology on Aero-Engines,
and Technology on Aero-Engines,
Beijing University of Aeronautics and Astronautics
,Beijing 100191
, China
Teck Neng Wong
e-mail: mtnwong@ntu.edu.sg
Fei Duan
School of Mechanical and Aerospace Engineering,
Nanyang Technological University
,50 Nanyang Avenue
,Singapore 639798
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received January 22, 2013; final manuscript received November 6, 2013; published online December 24, 2013. Assoc. Editor: Mark R. Duignan.
J. Fluids Eng. Feb 2014, 136(2): 021303 (7 pages)
Published Online: December 24, 2013
Article history
Received:
January 22, 2013
Revision Received:
November 6, 2013
Citation
Li, H., Neng Wong, T., Skote, M., and Duan, F. (December 24, 2013). "Non-Newtonian Liquid-Gas Non-Uniform Stratified Flow With Interfacial Level Gradient Through Horizontal Tubes." ASME. J. Fluids Eng. February 2014; 136(2): 021303. https://doi.org/10.1115/1.4026016
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