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Open AccessArticle

Entropy Analysis for Non-Newtonian Fluid Flow in Annular Pipe: Constant Viscosity Case

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Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 1913, Dhahran 31261, Saudi Arabia
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Technical Education Faculty, Afyon Kocatepe University, Afyon, Turkey
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Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 805, Dhahran 31261, Saudi Arabia
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Authors to whom correspondence should be addressed.
Entropy 2004, 6(3), 304-315; https://doi.org/10.3390/e6030304
Published: 6 June 2004
In the present study, non-Newtonian flow in annular pipe is considered. The analytical solution for velocity and temperature fields is presented while entropy generation due to fluid friction and heat transfer is formulated. The third grade fluid with constant properties is accommodated in the analysis. It is found that reducing non-Newtonian parameter increases maximum velocity magnitude and maximum temperature in the annular pipe. Total entropy generation number attains high values in the region close to the inner wall of the annular pipe, which becomes significant for low non-Newtonian parameters. Increasing Brinkman number enhances entropy generation number, particularly in the region close to the annular pipe inner wall. View Full-Text
Keywords: non-Newtonian; third grade fluid; annular pipe; entropy non-Newtonian; third grade fluid; annular pipe; entropy
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MDPI and ACS Style

Yilbas, B.S.; Yürüsoy, M.; Pakdemirli, M. Entropy Analysis for Non-Newtonian Fluid Flow in Annular Pipe: Constant Viscosity Case. Entropy 2004, 6, 304-315.

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