F321 Cut cell を用いた直交格子法による有限長円柱周りの流れの解析

概要

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Three-dimensional flow structures are observed in the Karman vortex street behind a circular cylinder when Reynolds number exceeds about 180 and it is pointed out that three-dimensional analysis is necessary to simulate such flow structures. Recently, the analysis with Cut cell method is paid attention again. Many results with Cut cell method for flows around 2-D objects are reported, but the results of 3-D analysis are not reported so many. In this study 3-D flows around a finite length circular cylinder in a uniform flow are studied by using finite volume method. The basic equation is incompressible Navier-stokes equation and numerical analysis was carried out at Reynolds number 1060. The flow structures behind the circular cylinder are studied for several different heights of cylinders, and numerical results are compared with the previous experimental results.
2002-07-23