와도-속도 정식화에서 Lagrangian 보오텍스법과 유한체적법의 비교 = A Comparison of a Lagrangian Vortex Method with a Finite Volume Method for the Vorticity- Velocity Formulation.

다국어 초록 (Multilingual Abstract)

We present an improved Lagrangian vortex method in 2-D incompressible unsteady viscous flows, which is based on a mesh-free integral approach of the velocity-vorticity formulation. Vorticity fields are represented by discrete vortex blobs that are updated by the Lagrangian vorticity transport with the particle strength exchange scheme. Velocity fields are expressed in a form of the Helmholtz decomposition, which are calculated by a fast algorithm of the Biot-Savart integration with a smoothed kernel and by a well-established panel method. No-slip condition is enforced through viscous diffusion of vorticity from a solid body into field. The vorticity flux is determined in such a way that spurious slip velocity vanishes. Through the comparison with the existing finite volume scheme for the transient vortical flows around an impulsively started cylinder at Reynolds number Re=550, we would obtain a more accurate scheme for vortex methods in complicated flows.

목차 (Table of Contents)

• Abstract
  
• 1. 서론
  
• 2. 정식화
  
• 3. 수치적 처리
  
• 4. 유동해석결과
  
• 5. 결론
  
• 참고문헌