한국전산유체공학회지 (Journal of computational fluids engineering)
- 제6권1호
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- Pages.21-30
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- 2001
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- 1598-6071(pISSN)
수직축을 중심으로 회전하는 직관과 정지한 곡관 내부의 발달하는 층류 유동의 유사성에 관한 수치적 연구
A Numerical Study on the Similarity of the Developing Laminar Flows between in Orthogonally Rotating Square Duct and Stationary Curved Square Duct
초록
A numerical study on the similarity of the developing laminar flows between in a straight duct rotating about an axis perpendicular to that of the duct and in a stationary curved duct was carried out. In order to clarify the analogy of two flows, dimensionless parameters K/sub LR/ = Re/(equation omitted) and Rossby number, Ro, in a rotating straight duct were used as a set corresponding to Dean number K/sub LC/ = Re/(equation omitted), and curvature ratio, λ, in a stationary curved duct. For the large values of Ro and λ, it is shown that the flow field satisfies the 'asymptotic invariance property', that is, there are strong quantitative similarities between the two flows such as flow patterns, friction factors, and maximum axial velocity magnitudes for the same values of K/sub LR/ and K/sub LC/ if they are correlated with dimensionless axial distances Z/sub R/ = z/(equation omitted) for a rotating duct flow and Z/sub C/ = z/(equation omitted) for a stationary curved duct flow.
키워드