A numerical study of heat and mass transport by double‐diffusive magnetoconvection in an electrically conducting fluid under sinusoidal/non‐sinusoidal rotational modulation

Abstract In this paper, we study the effects of rotational modulation on heat and mass transport due to double‐diffusive magnetoconvection in an electrically conducting fluid. study, different modes are considered. Using a perturbation method, Ginzburg–Landau equation which is nonautonomous obtained for amplitude. The effect transfer studied. For investigation buoyancy ratio onset convection, system Lorenz type equations solved using recent multistage spectral relaxation method. Furthermore, influence other fluid parameters thermal convection analyzed presented graphically. We find among results that increasing Taylor number reduce Nusselt Sherwood numbers. A comparison between sinusoidal non‐sinusoidal their magneto‐diffusive layer made. show square wave most destabilizing sense it leads early instabilities while triangular stabilizing modulation. nature flow pattern has been determined streamlines, isotherms, isoconcentrations.