The present article aims at investigating the effect of gravity modulation on chaotic convection of a viscoelastic fluid in porous media. For this. the problem is reduced into Lorenz system (non-autonomous) by employing the truncated Galerkin expansion method. The system shows transitions from periodic to chaotic behavior on increasing the scaled Rayleigh number R. https://www.parisnaturalfoodes.shop/product-category/sam-e/