An MHD viscous liquid stagnation point flow and heat transfer with thermal radiation and transpiration. (1st May 2020)

• Record Type: Journal Article
• Authors: Mahabaleshwar, U.S.; Nagaraju, K.R.; Vinay kumar, P.N.; Nadagoud, M.N.; Bennacer, R.; Baleanu, Dumitru
• Is Part Of: Thermal science and engineering progress. Volume 16(2020)
• Publication Date: 2020-05-01
• Subjects: Mass transpiration -- Thermal radiation -- Stagnation point -- Viscous liquid -- Heat transfer -- Kinematic parameters; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2019.100379
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: The physical flow problem is modelled into a nonlinear partial differential equations. Finds applications in the chemical industries dealing with fluids and elastic materials. The analytical solutions of momentum and thermal boundary layer are obtained. The temperature profiles are obtained for both type of heating processes. The effects of physical parameters on velocity and temperature are analyzed. Abstract: The impact of kinematic parameters magnetohydrodynamic (MHD) and thermal radiation on the unsteady flow of a Newtonian liquid through stagnation point due to a linear sheet with mass transpiration is considered. The characteristics of heat and MHD impinging on the sheet are analyzed theoretically. The flow of an electrically conducting liquid through stagnation point has gained considerable interest due to its industrial relevance. In the chemical engineering applications involving cooling of the liquid namely glass blowing, food processing, metal thinning, polymer extrusion, silicon chip manufacturing and applications of similar kind. In all these chemical engineering applications, the interplay between the regulating kinematic parameters and the nature of the fluid is of at most priority. The flow problem is modelled into nonlinear unsteady Navier-Stokes' partial differential equations. The similarity solution for the velocity distribution is obtained. Depending on the type of boundary heating, the analytical solutions for temperature distribution is derived by means of a power series (Gauss hypergeometric). Temperature distribution for two types of boundary heating processes viz., prescribed time-dependent constant surface temperature (PTDCST) and prescribed time-dependent wall heat flux (PTDWHF) is discussed. There found to exist branching of solutions for both velocity and temperature distribution for certain range of controlling parameters. In fact there exists dual solution for both cases of stretching/shrinking sheet and these are analyzed to see the impacts of various physical parameters on the solution domain. The impact of various regulating parameters on the velocity as well as temperature is analyzed by means of numerous plots.