Natural convection flow in a vertical annulus with time-periodic thermal boundary conditions

作     者：Basant K.Jha Michael O.Oni 

作者机构：Department of Mathematics.Ahmadu Bello UniversityZaria.Nigeria 

出 版 物：《Propulsion and Power Research》 (推进与动力（英文）)

年 卷 期：2019年第8卷第1期

页      面：47-55页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 080103[工学-流体力学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0802[工学-机械工程] 0703[理学-化学] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 0823[工学-交通运输工程] 

主　　题：Natural convection Fully developed flow Time-periodic heating Vertical annulus Strouhal number 

摘      要：This paper presents an analytical solution for natural convection flow in a vertical annulus due to time-periodic heating of annulus ***-form expressions for velocity,temperature,skin-friction,mass flow rate and rate of heat transfer which is expressed as Nusselt number are obtained by solving the present mathematical model after separating into steady component and periodic *** effects of pertinent parameters such as Strouhal number(St),Prandtl number(Pr)and radius ratio(λ)are shown with the aid of contour and line *** indicate that the role of Strouhal number and Prandtl number is to decrease fluid velocity,temperature and ***,increase in Strouhal number increases the temperature phase-lag.