Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions

Abstract Unsteady magnetohydrodynamic flow of Casson fluid over an infinite vertical plate is examined under ramped temperature and velocity conditions at the wall. Thermal radiation flux and heat injection/suction terms are also incorporated in the energy equation. The electrically conducting fluid...

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Autores principales:	Talha Anwar, Poom Kumam, Wiboonsak Watthayu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c0eef6d58f2e47ca882d8990b5cfedd4
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spelling	oai:doaj.org-article:c0eef6d58f2e47ca882d8990b5cfedd42021-12-02T14:03:56ZUnsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions10.1038/s41598-021-83691-22045-2322https://doaj.org/article/c0eef6d58f2e47ca882d8990b5cfedd42021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83691-2https://doaj.org/toc/2045-2322Abstract Unsteady magnetohydrodynamic flow of Casson fluid over an infinite vertical plate is examined under ramped temperature and velocity conditions at the wall. Thermal radiation flux and heat injection/suction terms are also incorporated in the energy equation. The electrically conducting fluid is flowing through a porous material and these phenomena are governed by partial differential equations. After employing some adequate dimensionless variables, the solutions are evaluated by dint of Laplace transform. In addition, the physical contribution of substantial parameters such as Grashof number, radiation parameter, heat injection/suction parameter, porosity parameter, Prandtl number, and magnetic parameter is appropriately elucidated with the aid of graphical and tabular illustrations. The expressions for skin friction and Nusselt number are also derived to observe wall shear stress and rate of heat transfer. A graphical comparison between solutions corresponding to ramped and constant conditions at the wall is also provided. It is observed that graphs of the solutions computed under constant conditions are always superior with respect to graphs of ramped conditions. The magnetic field decelerates the flow, whereas the radiative flux leads to an upsurge in the flow. Furthermore, the shear stress is a decreasing function of the magnetic parameter.Talha AnwarPoom KumamWiboonsak WatthayuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Talha Anwar Poom Kumam Wiboonsak Watthayu Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
description	Abstract Unsteady magnetohydrodynamic flow of Casson fluid over an infinite vertical plate is examined under ramped temperature and velocity conditions at the wall. Thermal radiation flux and heat injection/suction terms are also incorporated in the energy equation. The electrically conducting fluid is flowing through a porous material and these phenomena are governed by partial differential equations. After employing some adequate dimensionless variables, the solutions are evaluated by dint of Laplace transform. In addition, the physical contribution of substantial parameters such as Grashof number, radiation parameter, heat injection/suction parameter, porosity parameter, Prandtl number, and magnetic parameter is appropriately elucidated with the aid of graphical and tabular illustrations. The expressions for skin friction and Nusselt number are also derived to observe wall shear stress and rate of heat transfer. A graphical comparison between solutions corresponding to ramped and constant conditions at the wall is also provided. It is observed that graphs of the solutions computed under constant conditions are always superior with respect to graphs of ramped conditions. The magnetic field decelerates the flow, whereas the radiative flux leads to an upsurge in the flow. Furthermore, the shear stress is a decreasing function of the magnetic parameter.
format	article
author	Talha Anwar Poom Kumam Wiboonsak Watthayu
author_facet	Talha Anwar Poom Kumam Wiboonsak Watthayu
author_sort	Talha Anwar
title	Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
title_short	Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
title_full	Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
title_fullStr	Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
title_full_unstemmed	Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
title_sort	unsteady mhd natural convection flow of casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c0eef6d58f2e47ca882d8990b5cfedd4
work_keys_str_mv	AT talhaanwar unsteadymhdnaturalconvectionflowofcassonfluidincorporatingthermalradiativefluxandheatinjectionsuctionmechanismundervariablewallconditions AT poomkumam unsteadymhdnaturalconvectionflowofcassonfluidincorporatingthermalradiativefluxandheatinjectionsuctionmechanismundervariablewallconditions AT wiboonsakwatthayu unsteadymhdnaturalconvectionflowofcassonfluidincorporatingthermalradiativefluxandheatinjectionsuctionmechanismundervariablewallconditions
_version_	1718392045948633088

Unsteady MHD natural convection flow of Casson fluid incorporating thermal radiative flux and heat injection/suction mechanism under variable wall conditions

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