| Summary: | 碩士 === 逢甲大學 === 土木及水利工程研究所 === 89 === This thesis describes on a series of numerical simulation of two-dimensional flow around circular piers. A mold FLOTRAN of software package ANSYS, which used modified Galerkin formulation. The method, finite element analytic model, called Streamline-Upwind /Petrov-Galerkin (SUPG), uses this numerical model to simulate the incompressible Navier-Stokes equations.
We discussed several different cases in flow field at horizontal plane. First, we established a cylinder bridge pier closed to the sidewall, at Reynolds number = 200 for single seat. The second case discussed three seats of cylinder bridge pier, which established horizontally with different Reynolds number = 200、800, and different distance width of ratio at cylinder center and sidewall. By the results of simulation, we find the drag coefficient and lift coefficient are approached to 0.1 when increasing distance ratio both fixed Reynolds number in single bridge pier and different Reynolds number in three seats of bridge pier case. The drag coefficient and lift coefficient will be reduced when Reynolds number increased.
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