Effect of the Velocity Slip Boundary Condition on the Flow and Heat Transfer of Nanofluids Over a Stretching Sheet

2015 ◽  
Vol 12 (9) ◽  
pp. 2428-2436 ◽  
Author(s):  
Emad H. Aly
Keyword(s):  
Heat Transfer ◽  
Boundary Condition ◽  
Stretching Sheet ◽  
Velocity Slip ◽  
Slip Boundary Condition ◽  
Slip Boundary ◽  
Flow And Heat Transfer

Effect of slip boundary condition on flow and heat transfer of a double fractional Maxwell fluid

2020 ◽  
Vol 68 ◽  
pp. 214-223 ◽  
Author(s):  
Weidong Yang ◽  
Xuehui Chen ◽  
Zeyi Jiang ◽  
Xinru Zhang ◽  
Liancun Zheng
Keyword(s):  
Heat Transfer ◽  
Boundary Condition ◽  
Maxwell Fluid ◽  
Slip Boundary Condition ◽  
Slip Boundary ◽  
Flow And Heat Transfer

Numerical Investigation of Slip Flow and Heat Transfer in Rotating Rectangular Microchannels

2012 ◽  
Author(s):  
Pratanu Roy ◽  
N. K. Anand ◽  
Debjyoti Banerjee
Keyword(s):  
Heat Transfer ◽  
Boundary Condition ◽  
Convective Heat Transfer ◽  
Secondary Flow ◽  
Convective Heat ◽  
Slip Flow ◽  
Slip Boundary Condition ◽  
Fluid Temperature ◽  
Slip Boundary ◽  
Flow And Heat Transfer

Investigation of fluid flow and heat transfer in rotating microchannels is important for centrifugal microfluidics, which has emerged as an advanced technique in biomedical applications and chemical separations. The pseudo forces namely the centrifugal force and the Coriolis force arising as a consequence of the rotating reference frame change the flow pattern significantly from the parabolic profile in a non-rotating channel. The convective heat transfer process is also influenced by the secondary flow introduced by the rotational effect. Moreover, if the microchannel wall is hydrophobic, slip flow can occur inside the channel when the conventional no slip boundary condition is no longer valid. In this work, we have numerically investigated the flow and heat transfer inside a straight rotating rectangular microchannel in the slip flow regime. A pressure based finite volume technique in a staggered grid was applied to solve the steady incompressible Navier-Stokes and energy equations. It has been observed that, depending on the rotational velocity, different slip velocities are induced at the channel walls. The average fluid temperature increases with the increase of rotation as convective heat transfer mechanism is increased due to the secondary flow. However, the slip boundary condition has a negligible effect on the temperature profiles.

The effect of second order slip condition on MHD nanofluid flow around a semi-circular cylinder

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jiahui Cao ◽  
Jing Zhu ◽  
Xinhui Si ◽  
Botong Li
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Boundary Condition ◽  
Circular Cylinder ◽  
Volume Fraction ◽  
Velocity Slip ◽  
Slip Boundary Condition ◽  
Second Order ◽  
Ansys Fluent ◽  
Slip Boundary

Abstract Steady forced convection of non-Newtonian nanofluids around a confined semi-circular cylinder subjected to a uniform magnetic field is carried out using ANSYS FLUENT. The numerical solution is obtained using the finite volume method. The user-defined scalar (UDS) is used for the first time to calculate the second order velocity slip boundary condition in semi-circular curved surface and the calculated results are compared with those of the first order velocity slip boundary condition. Besides, the effects of volume fraction, size, type of nanoparticles and magnetic field strength on heat transfer are studied. The present study displays that adding nanoparticles in non-Newtonian fluids significantly enhances heat transfer. In addition, it is observed that the heat transfer rate decreases first and then increases with the increase of Hartmann number. The effects of blocking rate on Nusselt number, wake length and heat transfer effect are shown in the form of graphs or tables.

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