Abstract
To scrutinize the role of variable Lorenz force on treatment of ferrofluid within a complex preamble zone, numerical simulation has been done in this study. Existence of external magnetic source creates variable Lorentz force and enclosure with two sinusoidal walls was made from porous media. Mixture of iron oxide and H2O with concentration of 0.04 leads to considering homogeneous model for operating fluid. Adding the new source terms in equations creates complex model and CVFEM was utilized to solve the equations in form of vorticity. Impact of porous zone was incorporated according to non-Darcy model. Verification test proves low deviation with previous published article. Impacts of Lorentz and buoyancy terms as well as permeability on behavior of fluid were examined in view of contours and bar charts. As magnetic force employs, speed of nanoparticles declines and distortion of isotherms reduces. Lower temperature of hot wall obtains with augment of permeability and Ra. Higher permeability of zone makes higher velocity of nanofluid. Augment of Ha for highest value of Ra leads to reduction of strength of eddy about 11.76%. Temperature of inner surface decreases about 4.7% with augmentign Da. Growing Ra and Da makes Nu to augment by 131.29% and 2.66%. Also, increase of Ha leads to decline of Nu about 2.82%. Involving nanoparticles and radiation effect makes the Nu to enhance about 89.76% and 7.17%.
•Role of variable Lorenz force on treatment of ferrofluid was analyzed.•CVFEM is employed to model this multi physics problem.•Mixture of iron oxide and H2O with concentration of 0.04 is operating fluid.•Increase of Ha leads to decline of Nu about 2.82%.•Augment of Ra and Da makes Nu to augment about 131.29% and 2.66%.