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Two dimensional discrete vortex method for application to bluff body aerodynamics

1997; Elsevier BV; Volume: 67-68; Linguagem: Inglês

10.1016/s0167-6105(97)00072-x

1872-8197

Jens Honoré Walther, Allan Larsen,

Vibration and Dynamic Analysis

Two-dimensional viscous incompressible flow past a flat plate of finite thickness and length is simulated using the discrete vortex method. Both a fixed plate and a plate undergoing a harmonic heave and pitch motion are studied. The Reynolds number is 104 and the record onset flow speed, Ufc is in the range 2–14. The fundamental kinematic relation between the velocity and the vorticity is used in a novel approach to determine the surface vorticity. An efficient influence matrix technique is used in a fast adaptive multipole algorithm context to obtain a mesh-free method. The numerical results are compared with the steady-state Blasius solution, and with the inviscid solution for the flow past an oscillating plate by Theodorsen.