Volume 8, Issue 4 (1-2019)                   JEM 2019, 8(4): 86-99 | Back to browse issues page

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sheilhzadeh G, nazififard M, madahian R, kazemi K. Hydrodynamic-thermal Variations of a Nanofluid in a Tube Equipped with a Twisted Tape . JEM. 2019; 8 (4) :86-99
URL: http://energy.kashanu.ac.ir/article-1-971-en.html
1Faculty of Mechanical Engineering
Abstract:  
Thermal energy is one of the most important issues in most industries because the conversion of energy from fossil fuels to thermal energy occurs in almost all conventional industries. Therefore, regarding the lack of fossil resources and the ever-increasing pollution of human environment researchers should take notice of the proper use of thermal energy .In recent years, the focus has been directed towards the use of new technologies to increase the efficiency of thermal systems, including heat exchangers. Among these technologies which are considered in this paper is the simultaneous use of nanofluids and torsion strips which are placed inside the heat exchanger tube. In the present numerical study, a two-phase Euler-Lagrangian numerical simulation has been used for the first time in this geometry to overcome the shortcomings of previous monophasic studies. The effects of independent variables such as the volume fraction of nano-particles, Reynolds number, and the structural variables of the torsion bar such as the shear and the torque ratio on heat transfer and the coefficient of friction- have been investigated. The results show that other variables except for Reynolds have the same qualitative effects on heat transfer and friction coefficient.
Type of Study: Research | Subject: Mechanical Engineering

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