Electrohydrodynamic Instability of Two Thin Viscous Leaky Dielectric Fluid Films in a Porous Medium

Figure 13

Variation of growth rate 𝜔 with wavenumber 𝑘 for various values of 𝜖₂ when 𝜀=0.4, 𝑘₁=5, 𝑆¹⁽⁰⁾=0, 𝑆²⁽⁰⁾=0, 𝜖₁=3, 𝛽=0.5, 𝜇_𝑟=1, and 𝜖₂=4,6,10, respectively.