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

Figure 2

Variation of growth rate 𝜔 with wavenumber 𝑘 for various values of 𝜀 when𝑘₁=3, 𝑆¹⁽⁰⁾=10³, 𝑆²⁽⁰⁾=10⁴, 𝜖₁=3, 𝜖₂=4, 𝛽=0.5, 𝜇_𝑟=1, and 𝜀=0.1,0.3,0.5, respectively, for the wavenumber ranges (a) 0≤𝑘≤20 and (b) 0≤𝑘≤5.

(a)

(b)