Convective heat transfer of micropolar fluid in a horizontal wavy channel under the local heating. (August 2017)

• Record Type: Journal Article
• Authors: Miroshnichenko, Igor V.; Sheremet, Mikhail A.; Pop, Ioan; Ishak, Anuar
• Is Part Of: International journal of mechanical sciences. Volume 128/129(2017)
• Page Start: 541
• Page End: 549
• Publication Date: 2017-08
• Subjects: Mixed convection -- Micropolar fluid -- Horizontal channel -- Numerical results; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2017.05.013
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: Mixed convection of micropolar fluid in a horizontal wavy channel is analyzed. The finite difference method is used to solve the governing equations. Rayleigh number defines a dominance of natural convection regime with a formation of recirculation along the upper wall. An appearance of vortices depends on the location of the heater inside the channel. Abstract: A numerical analysis of laminar mixed convection of micropolar fluid in a horizontal wavy channel with a local heater has been carried out. Governing equations formulated in dimensionless stream function, vorticity and temperature have been solved by finite difference method. Effects of Rayleigh number, Reynolds number, Prandtl number, vortex viscosity parameter and undulation number on streamlines, isotherms, vorticity isolines as well as horizontal velocity and temperature profiles with average Nusselt number at the heater have been studied. It has been found that the average Nusselt number is an increasing function of Rayleigh, Reynolds and Prandtl numbers and a decreasing function of undulation number while an influence of vortex viscosity parameter is non-monotonic. Graphical abstract: