This paper presents results of several large-eddy simulations LES of turbulent flow in an open channel through staggered arrays of rigid, emergent cylinders, which can be regarded as idealized vegetation. In this study, two cylinder Reynolds numbers, RD =1,340 and RD=500, and three vegetation densities are considered. The LES of the lowest density and at RD=1,340 corresponds to a recently compl...

We consider directed graphs with an upward planar drawing on the plane, the sphere, the standing and the rolling cylinders. In general, the drawings allow complex curves for the edges with many zig-zags and windings around the cylinder and the sphere. The drawings are simplified to polyline drawings with geodesics as straight segments and vertices and bends at grid points. On the standing cylin...

We describe a number of different phenomena seen in the free-surface flow inside a partially filled circular cylinder which is rotated about its horizontal axis of symmetry. At low angular velocities the flow settles into a steady two-dimensional flow with a front where the coating film coalesces with the pool at the bottom of the cylinder. This mode becomes unstable at higher angular velocitie...