仮想境界デカルト格子法による円柱まわりの非圧縮性流れのDNS  第1報, 有効性の検証

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タイトル別名
  • DNS of the Incompressible Flows Around a Circular Cylinder Using Cartesian Grid Approach with Virtual Boundary. 1st Report. Validation of the Method.
  • カソウ キョウカイ デカルト コウシホウ ニ ヨル エンチュウマワリ ノ ヒアッシュクセイ ナガレ ノ DNS ダイ1ポウ ユウコウセイ ノ ケンショウ

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The DNSs of the incompressible flows around a circular cylinder are performed by using the Cartesian grid approach with virtual boundary method. In the virtual boundary method, the body surface is expressed by a set of plural points, and the velocity components on virtual boundary are feedbacked to the momentum equations as the additional forcing terms. As a validation of this method, the steady flows around a circular cylinder are computed in order to investigate the dependence of virtual boundary points on flow characteristics. Then, this method is applied to the unsteady flows. The results show that the present method is very promising for the DNSs of the incompressible complicated flow.

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