Study of hydrodynamics and heat transfer in non-Newtonian liquid-gas two-phase flow in horizontal pipes

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5695286

Deshpande, S D

Non-Newtonian liquid-gas stratified flow data in 0.026- and 0.052-m-diameter pipes were obtained. Interfacial level gradients between the two phases were observed. The Heywood-Charles model is found to be valid for pseudoplastic liquid-gas uniform stratified flow. Two-phase drag reduction in non-Newtonian systems was not achieved as the transition to semi-slug flow occurred before the model criteria were reached. Interfacial liquid and gas shear stresses were compared. A new parameter ..sigma../sup 2/ is introduced which is a numerical indication of the interfacial level gradient. Two-phase drag reduction was experimentally observed in polymer solution-air plug-slug flow in 0.026- and 0.052-m-diameter pipes. The Hubbard-Dukler pressure drop model was extended to non-Newtonian systems. Reasonable agreement between the experiment and the model predictions is obtained. However, more work needs to be done in order to better understand the two-phase drag reduction phenomena. Liquid holdup correlations were developed for both Newtonian and non-Newtonian systems which successfully correlate the holdup over a wide range of parameters. The Petukhov correlation is found to be better than the Dittus-Boelter correlation in predicting the single-phase water heat-transfer coefficients.

• Research Organization: Rice Univ., Houston, TX (USA). Dept. of Space Science
• OSTI ID: 5695286
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
DRAG
ENERGY TRANSFER
FLUID FLOW
FLUID MECHANICS
FLUIDS
GASES
HEAT TRANSFER
HYDRODYNAMICS
INTERFACES
LAYERS
LIQUIDS
MECHANICS
PIPES
TWO-PHASE FLOW