서지주요정보
콘 모양의 바닥을 가지는 축대칭 회전용기내의 스핀 엎 = Spin-up of a fluid in an axisymmetric rotating container with cone-shaped bottom
서명 / 저자 콘 모양의 바닥을 가지는 축대칭 회전용기내의 스핀 엎 = Spin-up of a fluid in an axisymmetric rotating container with cone-shaped bottom / 권기현.
저자명 권기현 ; Kwon, Ki-Hyun
발행사항 [대전 : 한국과학기술원, 1994].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8004462

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 94006

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In order to investigate the effects of the cone-shaped bottom of a rotating cylinder on spin-up, experiments were performed and Homicz & Gerber model was modified. The depth of the rotating cylinder changes linearly along the radial position. Flow field was visualized by means of aluminium flakes. The position of shear front and the transient shape of free surface were measured by Image Processing techniques. The thickness of Ekman layer on an inclined bottom changes along the radial position showing thicker Ekman layer at deeper position. Flux through the inclined Ekman layer is nearly the same as flux through a corresponding flat Ekman layer. Shear front moves faster inward in the shallow region of the cylinder than in the deep region. Spin-up of a fluid in the cylinder with a coneshaped bottom was accomplished faster than a corresponding flat bottom. Difference in depth of rotating cylinder is the main cause of the change in spin-up process. This trend comes out in the progressing shapes of free surface. Modified Homicz & Gerber model shows similar trend. In the present geometry, spin-up was little influenced by the change of Reynolds number, but influenced significantly by the change of aspect ratio. The effects become larger for smaller aspect ratio.

서지기타정보

서지기타정보
청구기호 {MME 94006
형태사항 ii, 33 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ki-Hyun Kwon
지도교수의 한글표기 : 현재민
지도교수의 영문표기 : Jae-Min Hyun
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 16-17
주제 Flow visualization.
Image processing.
Rotational motion.
Shear flow.
Unsteady flow (Fluid dynamics)
회전류. --과학기술용어시소러스
화상 처리. --과학기술용어시소러스
부정류 (수력) --과학기술용어시소러스
전단류. --과학기술용어시소러스
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