Nonlinear Magnetoconvection in a Sparsely Packed Porous Medium

Figure 3

Above figure is plotted for 𝐷_𝑎=1500, Λ=0.85, 𝜙=0.9, 𝑀=0.9, and Pr₂=1.𝜆₃ is the nonlinear coefficient of Ginzburg-Landau equation at the onset of stationary convection. The pitchfork bifurcation is supercritical if 𝜆₃>0, subcritical if 𝜆₃<0 and 𝜆₃=0 on the curve.