The water/copper nanofluid flow and convection heat transfer in concentric inclined annulus embedded in porous medium is studied numerically. The length of cylinders in Z-direction is considered infinite and both the cylinders are kept at constant temperature. A static transverse magnetic field of strength  is working in form of Lorentzian force and constant suction/inject is also applied on outer cylinder. The governing equations of fluid flow and heat transfer are solved by differential transformation method (DTM) followed by Newton method. The graphs of both velocity components and temperature profile are derived to show the influence of various physical parameters including Reynolds number, Darcy number, Prandtl number, magnetic number, solid volume fraction of nanoparticles and width ratio parameter. Velocity and temperature profiles for different type nanofluids H₂O/Ag, H₂O/Al₂O₃ are discussed through graphs. Vorticity and temperature are highest and lowest amongst H₂O-TiO₂, H₂O-Al₂O₃, H₂O-Ag and H₂O-Cu for H₂O-Al₂O₃ and H₂O-Ag nanofluids. The magnitude of heat transfer is more for cylindrical shape nanoparticles as compare of spherical shape nanoparticles. There is proportional relation between Prandtl number and θ(η). The coefficient of skin friction and heat transfer coefficient in terms of Nusselt number are calculated in account of different parameters at inner cylinder as well as outer cylinder.

nanofluid, inclined concentric annulus, porous medium, DT method, convection heat transfer.