ポーラス状の外側部をもつ円柱まわりの流れの数値シミュレーション

Translated title of the contribution: Numerical simulation of flow around a circular cylinder with porous body at its periphery

秦 祐也, 永井 修平, 大屋 裕二, 辻 美奈子, 内田 孝紀, 烏谷 隆

Research output: Contribution to journalArticle

Abstract

The flow past a circular cylinder surrounded by a porous body was numerically investigated using a 2D-DNS code for various porosity Ct. We find strange wake structures of the cylinder-porous body. The wake flows are classified into three regimes. Regime I (Ct <1.0) : Karman vortex street from the inside solid cylinder is clearly formed. A pair of separated shear layers from the outside porous body surround the inside vortex street and form the vortex street in the far downstream. Regime II (1.5 < Ct < 10) : The inside Karman vortex street disappears. Regime III (15 < Ct ) : The Karman vortex street from the outside porous body is dominant. In this report, the characteristics of three wake structures are investigated in detail.
Translated title of the contributionNumerical simulation of flow around a circular cylinder with porous body at its periphery
Original languageJapanese
Pages (from-to)257-262
Number of pages6
Journal風工学シンポジウム論文集
Volume21
Issue number0
DOIs
Publication statusPublished - 2010

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