title: MHD Flow and Heat Transfer between Coaxial Rotating Stretchable Disks in a Thermally Stratified Medium.
abstract: This paper investigates the unsteady MHD flow of viscous fluid between two parallel rotating disks. Fluid fills the porous space. Energy equation has been constructed by taking Joule heating, thermal stratification and radiation effects into consideration. We convert system of partial differential equations into system of highly nonlinear ordinary differential equations after employing the suitable transformations. Convergent series solutions are obtained. Behavior of different involved parameters on velocity and temperature profiles is examined graphically. Numerical values of skin friction coefficient and Nusselt number are computed and inspected. It is found that tangential velocity profile is increasing function of rotational parameter. Fluid temperature reduces for increasing values of thermal stratification parameter. At upper disk heat transfer rate enhances for larger values of Eckert and Prandtl numbers.
authors.affiliation: Department of Mathematics, Quaid-I-Azam University 45320, Islamabad, Pakistan.|Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Tasawar
authors.initials: T
authors.lastname: Hayat
authors.affiliation: Department of Mathematics, Quaid-I-Azam University 45320, Islamabad, Pakistan.
authors.forename: Sumaira
authors.initials: S
authors.lastname: Qayyum
authors.affiliation: Department of Mathematics, Quaid-I-Azam University 45320, Islamabad, Pakistan.
authors.forename: Maria
authors.initials: M
authors.lastname: Imtiaz
authors.affiliation: Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Alsaedi
mesh_terms: D000465:Algorithms; D057446:Hydrodynamics; D008962:Models, Theoretical; D012399:Rotation; D013816:Thermodynamics