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Numerical solutions of the nonlinear, normal thickness variant for selected cases of film growth (left panel) and film shrinkage (right panel). Dashed lines show r – t and solid lines show r; colors indicate iterations. The zeroth iteration, shown in blue, is a solution of the linear model [Eqs. (6) and (7)] with parameters as follows: ∊ = 0.6 (left panel) −0.6 (right panel), c = T/a = 0.1, t0/a = 0.2, q = 6, ϕ = e = 0.
