ORIGINAL PAPER Magnetic effects in rotating flow of an Oldroyd-B fluid with chemical reaction and convective surface M I Khan 1 *, S Rashid 1 *, T Hayat 1,2 , M Ayub 1 and A Alsaedi 2 1 Department of Mathematics, Quaid-I-Azam University, Islamabad 45320, Pakistan 2 Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia Received: 24 January 2019 / Accepted: 25 April 2019 Abstract: Here, we have investigated 3D incompressible steady MHD flow of Oldroyd-B material in a rotating frame. The flow is caused through linearly stretched sheet. Applied magnetic field is accounted. Cubic autocatalytic chemical reaction is considered at the surface. Convective conditions at the boundary are considered for heat transport. Flow problem is modeled with the help of boundary layer approximations. Homotopy method is utilized for the series solutions. Impacts of physical variable are interpreted graphically. Heat transfer rate is presented in tabulated form. Keywords: Oldroyd-B fluid; Homogeneous-heterogeneous reactions; Convective boundary conditions; Rotating frame; Magnetohydrodynamic (MHD) PACS Nos.: 47.15.G-; 47.10.ad; 47.65.-d; 47.45.Gx; 44.05. ? e; 81.16.Ta 1. Introduction Materials which have nonlinear deformation upon the applications of shear stress are termed as non-Newtonian. Non-Newtonian material (fluid) plays an important role in various parts of mechanical engineering, textile industries and branches of applied science. There are numerous applications of such materials for instance, honey, tomato, toothpaste, mud, shampoo, paints and so many others. Not only single relation is required to examine the different characteristics of non-Newtonian material. There are vari- ous fluid models which describe the nature of non-New- tonian material like, Casson model, Prandtl model, Carreau model, Second-grade model, Jeffrey model, Maxwell model, Oldroyd-B model, Third-grade model and so many other fluid models. Here, we have utilized Oldroyd-B model to investigate the flow behavior of a stretchable surface in rotating frame. The Oldroyd-B model describes the aspects of relaxation as well as retardation times. References [1–20] present the aspects of characteristics of flow behavior through various fluid models. The homogeneity and heterogeneity are two chemical conceptions that we designate related to the uniformity of a subject. The term homogeneous denotes ‘‘same’’ and heterogeneous refers to ‘‘different.’’ The chemical pro- cesses that occur in a single phase (liquid, gaseous or solid) are homogeneous reaction. There are two broad classes of reactions namely homogeneous and heterogeneous based on the physical state of the present substances. The most important of homogenous processes are the reactions inside gasses (for example, the combination of common house- hold gas and oxygen to yield a flame) and the processes between fluids or substances melted in liquids (for instance, the reactions or processes between aqueous solutions of bases and acids). From the theoretical point of view, homogeneous processes are the simpler of two categories of processes because the chemical changes that take place are exclusively dependent on the nature of interactions of reacting substances. In this considered flow analysis, we have implemented the cubic autocatalytic chemical reac- tion at the surface. Mass diffusions are assumed equal to examine the attributes of mass concentration. References [21–40] represent the aspects of chemically reactive flow over a stretchable surface. *Corresponding author, E-mail: mikhan@math.qau.edu.pk; s.rashid@math.qau.edu.pk Indian J Phys https://doi.org/10.1007/s12648-019-01571-y Ó 2019 IACS