Frontiers in Heat and Mass Transfer (FHMT), 9, 38 (2017) DOI: 10.5098/hmt.9.38 Global Digital Central ISSN: 2151-8629 1 HEAT TRANSFER ON MHD NANOFLUID FLOW OVER A SEMI INFINITE FLAT PLATE EMBEDDED IN A POROUS MEDIUM WITH RADIATION ABSORPTION, HEAT SOURCE AND DIFFUSION THERMO EFFECT N. Vedavathi a , G. Dharmaiah b* , K.S. Balamurugan c and J. Prakash d a Department of Mathematics, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, 522502, India. b Department of Mathematics, Narasaraopeta Engineering College, Yellamanda, Narsaraopet, Andhra Pradesh, 522601, India. c Department of Mathematics, RVR & JC College of Engineering, Chowdavaram, Guntur, Andhra Pradesh, 522019, India. d Department of Mathematics, University of Botswana, 4775 Notwane Gaborone, PrivateBag, UB0022, Botswana. ABSTRACT The effects of radiation absorption, first order chemical reaction and diffusion thermo on MHD free convective heat and mass transfer flow of a nanofluid past a semi infinite vertical flat plate are analyzed. The temperature and concentration at the surface are assumed to be oscillatory type. Four types of cubic nano particles which are uniform and size namely, Silver (Ag), Aluminum (Al 2 O 3 ), Copper (Cu) and Titanium Oxide (TiO 2 ) with water as a base fluid is taken into account. The set of ordinary differential equations are solved by using regular perturbation technique. The impact of various flow parameters on nanofluid velocity, temperature, concentration as well as the friction factor coefficient, the rate of heat and mass transfer coefficients are derived and discussed through graphs and tables. Keywords: Nanofluids, Boundary layer flow, Radiation Absorption, MHD, Heat and Mass Transfer. * Corresponding Author. Email: dharma.g2007@gmail.com 1. INTRODUCTION Convective boundary layer flow, heat and mass transfer are influenced by nanofluid over a flat plate with diffusion thermo. It has tremendous applications in numerous areas like as glass blowing and elastic sheets. Nanofluid is a sort of heat and mass transfer fluids that contains base fluid and nano particles. Nanofluids utilized as a part of nanofluids are normally formed metals (Al, Cu), Oxides (Al 2 O 3 , TiO 2 ), nitriles (AlN, SiN) and carbides (SiC). Base fluid is typically a conductive liquid; for instant C 2 H 6 O 2 , H 2 O and engine oil. Nanofluids with or without the presence of magnetic field have numerous applications in the industries since materials of nanometer size have unique chemical and physical properties with regard to sundry utilizations of nano fluids, the cooling applications of nanofluids incorporate silicon mirror cooling, electronics cooling, vehicle cooling, transformer cooling and so on. Magneto-hydrodynamic convective flow issues are exceptionally imperitive and some of the works on chemical engineering, planetary and stellar magnetospheres and aeronautics can be found in (Ellahi (2013), Ali (2010), Noghehabadi et al. (2013), Mahabood et al. (2015)). Nanofluids have been appeared to increase the thermal conductivity and convective heat transfer performance of the base liquids. Due to the increasing importance of nanofluids, there is a huge amount of literature on convective heat transport in nanofluids problems. Nanofluid is described as a fluid containing nanometer-sized particles, called nanoparticles within the length scale of 1-100 nm diameter and 5% volume fraction of nanoparticles. These fluids are suspended in designing colloidal system of nanoparticles in a base fluid. The hypothesis of nanofluid is first presented by Choi (1995) and has been a field of dynamic research area for about two decades. Choi has proposed the infusion of nano-size particles into regular fluids, for example, water and oil. He has demonstrated experimentally that the injection of these particles enhances the thermal conductivity of the fluid. This conclusion has opened the best approach to utilize these new fluids in chemical engineering, mechanical designing, medicine, and many other fields. As of late, the idea of a nanofluid has been proposed as a route for enhancing the execution of the heat transfer rates in the liquids. The investigation of heat generation or absorption parameter impacts on moving fluid is an important in view of several physical problems. Due to the quick development of electronic technology, effective cooling of electronic equipment towards becoming cooling of electronic equipment ranges and warranted from individual transistors to centralized server PCs and from energy suppliers to telephone switch boards. By considering temperature dependent heat generation / absorption, several authors have investigated the heat transfer problems. Copper nano particles of mean width less than 10 nm, examined by Choi and Zhang (2001). Das et al., (2003) inspected a 2-4 fold rise in thermal conductivity development for nanofluid containing TiO 2 – water nano particles over a small temperature vary from 21 0 – 51 0 C. The existing literature demonstrated that ensures the enlargement of nanoparticles in the base fluid may accomplish an essentially reducing in the heat transfer; for comprehensive review, see [Mankinde and Aziz (2011), Khan and Pop (2010) and Nadeem and Haq (2014)]. Thermal conductivity of the nanofluid K nf neatly discussed by Maxwell (1904). Flow in permeable media was considered through various examinations in the amidst recent decades. It has different applications in mechanical and chemical engineering, particularly in soil matrix heat exchangers, non-atomic waste, stringy protection insulation, ground water hydrology, energy efficient drying process and so forth. There has been Frontiers in Heat and Mass Transfer Available at www.ThermalFluidsCentral.org