Nonlinear Magnetoconvection in a Sparsely Packed Porous Medium

Figure 1

Numerically calculated marginal stability curves are plotted in (𝑅,𝑞)-plane for Pr₁=1, Pr₂=1.5, 𝐷_𝑎=1500, Λ=0.85, 𝜙=0.9, and 𝑀=0.9,  (a)  𝑄=10⁴, (b)  𝑄=10⁶, (c)  𝑄=10⁸, and (d)  𝑄=10¹⁰, then the onset of stationary convection and the onset of oscillatory convection increase (stationary convection represented by solid lines and oscillatory convection represented by dotted lines).

(a)

(b)

(c)

(d)