Entropy generation analysis of non-newtonian fluid in rotational flow

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Kosarineia Abbas

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Journal Paper

Paper Information

Journal: Journal of Computational and Applied Research in Mechanical Engineering Year:2019 | Volume:9 | Issue:1 Page(s): 129-140

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Title

Entropy generation analysis of non-newtonian fluid in rotational flow

Author(s)

Kosarineia Abbas | Issue Writer Certificate

Keywords

Rotational flow

Entropy generation

Deborah number

Nonlinear equations

Perturbation method

Abstract

The Entropy generation analysis of non-Newtonian fluid in Rotational flow between two concentric cylinders is examined when the outer cylinder is fixed and the inner cylinder is revolved with a constant angular speed. The viscosity of non-Newtonian fluid is considered at the same time interdependent on temperature and shear rate. The Nahme law and Carreau equation are used to modeling dependence of viscosity on temperature and shear rate, respectively. The viscous dissipation term is adding elaboration to the formerly highly associate set of governing motion and energy equations. The Perturbation method has been applied for the highly nonlinear governing equations of base flow and found an approximate solution for narrowed gap limit. The effect of characteristic parameter such as Brinkman number and Deborah number on the Entropy generation analysis is investigated. The overall Entropy generation number decays in the radial direction from rotating inner cylinder to stationary outer cylinder. The results show that overall rate of Entropy generation enhances within flow domain as increasing in Brinkman number. It, however, declines with enhancing Deborah number. The reason for this is very clear, the pseudo plastic fluid between concentric cylinders is heated as Brinkman number increases due to frictional dissipation and it is cooled as Deborah number increases which is due to the elasticity behavior of the fluid. Therefore, to minimize entropy need to be controlled Brinkman number and Deborah number.

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APA: Copy

Kosarineia, Abbas. (2019). Entropy generation analysis of non-newtonian fluid in rotational flow. JOURNAL OF COMPUTATIONAL AND APPLIED RESEARCH IN MECHANICAL ENGINEERING (JCARME), 9(1), 129-140. SID. https://sid.ir/paper/768386/en

Vancouver: Copy

Kosarineia Abbas. Entropy generation analysis of non-newtonian fluid in rotational flow. JOURNAL OF COMPUTATIONAL AND APPLIED RESEARCH IN MECHANICAL ENGINEERING (JCARME)[Internet]. 2019;9(1):129-140. Available from: https://sid.ir/paper/768386/en

IEEE: Copy

Abbas Kosarineia, “Entropy generation analysis of non-newtonian fluid in rotational flow,” JOURNAL OF COMPUTATIONAL AND APPLIED RESEARCH IN MECHANICAL ENGINEERING (JCARME), vol. 9, no. 1, pp. 129–140, 2019, [Online]. Available: https://sid.ir/paper/768386/en

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