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- W2053028918 abstract ": 선형상관계수 U : 유동 평균속도 u : x방향 속도 u* : 무차원 u속도 v : y방향 속도 w : z방향 속도 x : 평면에 정사영 되는 거리 x : 표면 경계에 평행한 방향 y : 표면 경계에 수직한 방향 y* : 무차원 유동장 높이 z : x와 y에 수직한 방향 그리스문자 τ : 전단응력 Key Words: Free Surface Flow(자유표면유동), Shear Stress Ratio(전단응력 비), Optimal Design(최적설계), Ejection Pattern(토출패턴) 초록: 회전원판 위 표면에 작용하는 유동 전단응력은 표면마모를 발생시키는 주원인이다. 유체는 원심력에 의해 가장자리까지 자유표면을 갖는 박막유동으로 전달된다. 표면마모는 받음각 또는 곡률에 따른 전단응력 정도에 비례하여 차이를 보이게 된다. 전산해석을 통한 속도분포 기울기로 받음각에 기준한 곡률의 전단응력비를 비교하였다. 곡률반경 변화에 따른 전단유동의 응력감소를 모델링하여 표면마모를 효율적으로 줄일 수 있는 최적구간을 결정하는 것이 본 연구의 주제이며, 이 연구결과는 회전무화나 박막코팅과 같은 박막유동을 활용하는 기구의 최적설계에 적용될 수 있다. Abstract: The shear stress on a surface due to the thin film fluid flow is an important issue. In case of a rotating disk, the fluid is delivered to the edge of the disk by centrifugal force, which acts as a body force on the fluid. Wear of a surface is affected by the shear stress acting on the surface and curvature. In this study, we utilize computational fluid dynamics software to model the ratio of curvature and local shear stress on solid surfaces. The key goal of the study is to determine an optimized curvature for the thin film fluid flow on a solid surface in order to minimize the local shear stress affecting the wear of this surface. Our results on the effects of curvature will be utilized for the design of devices that utilize thin film fluid flow on a solid surface, such as rotating-disk spray systems and thin film coating." @default.
- W2053028918 created "2016-06-24" @default.
- W2053028918 creator A5009363254 @default.
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- W2053028918 date "2014-12-01" @default.
- W2053028918 modified "2023-09-27" @default.
- W2053028918 title "Design of Reduced Shear Stress with High-Viscosity Flow Using Characteristics of Thin Film Flow on Solid Surfaces" @default.
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- W2053028918 doi "https://doi.org/10.3795/ksme-b.2014.38.12.1027" @default.
- W2053028918 hasPublicationYear "2014" @default.
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