Steady nanofluid convective flow in a porous cavity is investigated. Darcy and KKL models are considered for porous media and nanofluid, respectively. The solutions of final equations are obtained by CVFEM. Effective parameters are number of undulations, CuO-water volume fraction, Hartmann and Rayleigh numbers for porous medium. A correlation for Nuave is presented. Results depicted that heat transfer improvement reduces with rise of buoyancy forces. Influence of adding nanoparticle augments with augment of Lorentz forces. Increasing Hartmann number leads to decrease temperature gradient.