Fig. 8

Displays the effect of PEL number \(P_{e}\) on stability boundaries \((\log E_{0}^{2} \,{\text{vs}}{.}\,\,k)\), \(P_{e}\) varies from 0.0 to 12, while other parameters remain fixed. Stable (S) and unstable (U) regions are indicated. The non-dimensional parameters held constant are as in Fig. 7, except \(D_{n} = 1.00\).