Heat transfer and entropy investigation of non-Newtonian nanofluid mixed convection in a cubic cavity with a wavy bottom wall under the influence of a magnetic field

This article reports 3D simulations of nanofluid motion within a three-dimensional cubic cavity occupied with a permeable medium. It was supposed that the motion region holds a hot spinning cylinder and has a wavy bottom plane with various undulation values. Also, the domain was separated into two levels., namely, the permeable layer and the power-law nanofluid layer. The worked mixture is a non-Newtonian liquid, and the magnetic impacts are analyzed. The (FEM) with a triangle-shaped part form was used to resolve the governing formulas. The results were demonstrated for a variety of motion factors, including the cylinder's angular velocity ( Ω = 0 to 2000), Hartmann number (Ha= 0-10), power-law index (n= 0.8, 1 and 1.4), and undulation numbers (N= 1 to 4). The effects of the different factors on motion, heat transmission, and entropy formation are illustrated in stream function, isotherms, and isentropic contours. Increased amounts of Ω , Da, N, φ, besides decreased values of Ha, enhance the heat transmission. The majority of entropy production is caused by heat transmission.; though liquid resistance and magneto impact also influence it.