Fig. 3 Effects of h_o, L, and h_p on finger formation. (a) h_o = 3.5, L = 5, h_p = 8.1; (b) h_o = 5, L = 5, h_p = 8.1; (c) h_o = 7, L = 5, h_p = 8.1; (d) h_o = 10, L = 5, h_p = 8.1; (e) h_o = 5, L = 15, h_p = 8.1; (f) h_o = 5, L = 5, h_p = 4.0