Paper Title:
Application of Modified Power Law and Arrhenius Relationship in Studying Rheological Behavior of Bio-Oils
  Abstract

Tribological aspects of bio-oils have to be investigated before they are used as industrial fluids. In this paper rheological (fluid deformation under shear) properties of four bio-oils are presented. A Couette type viscometer was used to evaluate flow behavior of the oils at seven discrete temperatures. Commercial coconut, canola, sunflower and corn oil were used in this study. For all the oil samples, viscosities were affected by the change of shear rate and temperature. Two rheological models, temperature dependence and shear rate dependence, were used in the study. The original power law gives contradict picture of flow curves and flow parameters. Thus, modified power law model was proposed. The modified model was fitted to experimental data to obtain the flow behavior index. Arrhenius type equation was fitted to experimental data to obtain the activation energy due to different temperatures and shear rates. Evaluation of rheological properties by modified power law model indicates that these bio-oils belong to the pseudo-plastic group.

  Info
Periodical
Edited by
A.K. Arof and S.A. Hashim Ali
Pages
147-152
DOI
10.4028/www.scientific.net/MSF.517.147
Citation
W.S. Wan Nik, S.G. Eng Giap, H.H. Masjuki, H.B. Senin, "Application of Modified Power Law and Arrhenius Relationship in Studying Rheological Behavior of Bio-Oils", Materials Science Forum, Vol. 517, pp. 147-152, 2006
Online since
June 2006
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$32.00
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