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The same situation as Fig. 1 but for convex pore. (a) System No. 6 at t = 0. (b) System No. 6 at t = 10 ns. (c) System No. 8 at t = 0. (d) System No. 8 at t = 10 ns. Again, empty regions are exist at the entrance of slits. (Visualized with Ovito36).