Fig. 14

NS simulations for Rayleigh-Taylor instability with Reynolds number Re_∞=50000. From left to right: adaptive mesh for P¹ element; 30 equally spaced density contours from 0.8728 to 2.2249 for P¹ element; adaptive mesh for P² element; 30 equally spaced density contours from 0.8733 to 2.2262 for P² element