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Effects of axial forces on drillstring lateral vibrations
Lateral vibrations of stabilized bottomhole assemblies (BHA) of drill-strings often exhibit quite complicated patterns. Previous work has taken into account nonlinearities due to fluid damping, wall contact, eccentric ...
Two-dimensional modeling of flow and sedimentation
A two-dimensional (vertical) flow model is developed to simulate open channel flow. The governing equations are solved without any depth averaging. Free surface movement is handled with the help of Arbitrary Lagrangian ...