Fluid flow and heat transfer of non-Newtonian nanofluid in a microtube considering slip velocity and temperature jump boundary conditions

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• 作者：Seyed Ali Sajadifar^a ; Arash Karimipour^a ; ^{arashkarimipour@gmail.com} ; Davood Toghraie^b
• 关键词：Microtube ; Slip flow regime ; Slip coefficient ; Non-Newtonian nanofluid
• 刊名：European Journal of Mechanics - B/Fluids
• 出版年：2017
• 出版时间：January-February 2017
• 年：2017
• 卷：61
• 期：part_P1
• 页码：25-32
• 全文大小：712 K
• 卷排序：61

文摘

Forced convection of non-Newtonian nanofluid, aqueous solution of carboxymethyl cellulose (CMC)–Aluminum oxide through a microtube is studied numerically. The length and diameter of tube are L=5L=5 mm and D=0.2D=0.2 mm, respectively which means the length is long enough compared to the diameter. The effects of different values of nanoparticles volume fraction, slip coefficient and Reynolds number are investigated on the slip velocity and temperature jump boundary conditions. Moreover the suitable validations are presented to confirm the achieved results accuracy. The results are shown as the dimensionless velocity and temperature profiles; however the profiles of local and averaged Nusselt number are also provided. It is seen that more volume fraction and slip coefficient correspond to higher Nusselt number especially at larger amounts of Re.