Second law of thermodynamics analysis of hydro-magnetic nano-fluid slip flow over a stretching permeable surface

作者：Jafari Seyed Sajad^*; Freidoonimehr Navid

来源：Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2015, 37(4): 1245-1256.

DOI：10.1007/s40430-014-0250-z

• Second law of thermodynamics
• Slip flow
• MHD
• Nano-fluid
• Stretching surface
• Optimal homotopy analysis method

The main purpose of the present article is to study the second law of thermodynamics over a stretching permeable surface in the presence of the uniform vertical magnetic field in the slip nano-fluid regime. In this study, four types of nanoparticles; i.e., Copper Cu, Copper oxide CuO, Aluminum oxide Al2O3, and Titanium dioxide TiO2 and also water as the base fluid are considered. Entropy generation equations, for the first time in this problem, are derived as a function of velocity and temperature gradients. Velocity profile as well as temperature distribution and averaged entropy generation are obtained using optimal homotopy analysis method (OHAM). An excellent agreement exists between the present result and the other researchers' result. The obtained result of present study presents that by decreasing magnetic parameter, nanoparticle volume fraction parameter, suction parameter, Reynolds number, Brinkman number, and Hartmann number as well as increasing the slip velocity parameter, the generated entropy reduces.

• 出版日期2015-7