Universal Journal of Mechanical Engineering Vol. 1(2), pp. 23 - 31
DOI: 10.13189/ujme.2013.010201
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Fully-Developed Circular-Pipe Flow of a Non-Newtonian Pseudoplastic Fluid


Lun-Shin Yao1, Md. Mamun Molla2,*, S. Ghosh Moulic3
1 School for Engineering of Matter, Transport and Energy, Arizona State University, Arizona, 85287, USA
2 Department of Electrical Engineering & Computer Science, North South University, Dhaka-1229, Bangladesh
3 Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India

ABSTRACT

A fully-developed flow of a non-Newtonian pseudoplastic fluid through a circular pipe has been studied using a four-parameter model, as an example, for the shear-rate dependent apparent viscosity. The model used in this investigation is a modification of the two-parameter Ostwald-de Waele power law [1], which correctly represents the lower and upper regions of Newtonian behavior characteristic of pseudoplastic polymer melts and solutions. Since there has only one set complete experimental data available for the shear-rate dependent viscosity, we use them to show that a perfect match can be achieved between the modified power-law viscosity model and the experimental data. Such a perfect match is required for an accurate prediction of the flow behavior in internal flow problems.

KEYWORDS
Fully developed pipe flow, non-Newtonian fluid, modified power-law visclsoity model

Cite this paper
Lun-Shin Yao , Md. Mamun Molla , S. Ghosh Moulic . "Fully-Developed Circular-Pipe Flow of a Non-Newtonian Pseudoplastic Fluid." Universal Journal of Mechanical Engineering 1.2 (2013) 23 - 31. doi: 10.13189/ujme.2013.010201.