Ferroconvection In A Sparsely Distributed Porous Medium With Time-Dependent Sinusoidal Magnetic Field

<p>The stability of a horizontal sparsely packed porous layer ferromagnetic fluid heated from below is examined when the subjected to time-dependent magnetic field modulation. The effects oscillating are treated by perturbation expansion in powers amplitude applied field. onset criterion derived based on condition that principle exchange stabilities valid. system, characterized correction Rayleigh number, computed as function magnetic, parameters and frequency It found modulated ferroconvection can be delayed or advanced controlling these parameters. effect various significant for moderate values problem throws some light external means regulating convection applications.</p>