한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2009년 추계학술대회논문집
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- Pages.44-48
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- 2009
와도장에 근거한 후류 가시화 기법
A VORTICAL WAKE VISUALIZATION METHOD BASED ON THE VORTICITY FIELD
초록
In this study, a vortex visualization method based on the vorticity magnitude is developed. One of the simplest models for a vortex is a vortex filament with the maximum vorticity on its center. The proposed method is based on the observation of this ideal distribution of vorticity magnitude. Laplacian and Hessian matrix of vorticity magnitude are tested for detecting the local maximum of vorticity magnitude. These ideas were applied to wake flow past a sphere. It was found that the Laplacian method is not able to distinguish vortices from the underlying shear layer clearly, while the Hessian matrix method does not suffer from this problem.