서지주요정보
회전하는 환형 원통내의 비정상 이중확산 대류 = Unsteady double diffusive convection in a rotating annulus
서명 / 저자 회전하는 환형 원통내의 비정상 이중확산 대류 = Unsteady double diffusive convection in a rotating annulus / 조원국.
발행사항 [대전 : 한국과학기술원, 1991
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소장정보

등록번호

8001942

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 9146

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리뷰정보

초록정보

A numerical study is made of a double diffusive stratified convection in a rotating annulus. Qualitative characteristics of the fluid flows is described with the variations of two diffusive effects, i.e., temperature and salinity gradient, where the fluid is initially rest with a pre-existing stably stratified solutal gradient. High accurate pseudospectral method is employed for integrating the axisymmetric incompressible Navier-Stokes equations with the Boussinesq fluid assumption. We are to study the xplicit effects of double diffusivity of the stratification parameter St, the buoyancy ratio $R_ρ$ and Lewis number Le at fixed $R_t=10^5$, the aspect ratio is 1. The Ekman number is small enough, the aspect ratio(=height/width) is 0(1). Contourplots of all properties, profiles of radial velocity, local Nusselt number, temperature and solute, and time dependence of velocites at fixed point are presented for easy understanding of the results. When $R_ρ$ is large, convection is strongly restricted and two cells are formed. Because of weak convective motions, temperature is propagated mainly by conduction and solute distribution is not much deformed from initial value. In two celled pattern, azimuthal velocity distribution works against layered structure. When $R_ρ$ is small, vigorous convection works against layered violent heat and mass transport. Here rotation strengthen the stable stratification effects.

서지기타정보

서지기타정보
청구기호 {MME 9146
형태사항 [iv], 40 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Won-Kook Cho
지도교수의 한글표기 : 성형진
지도교수의 영문표기 : Hyung-Jin Sung
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 19-20
주제 Heat --Convection.
Unsteady flow (Fluid dynamics)
Rotational motion.
Diffusion.
회전 원통. --과학기술용어시소러스
열 확산. --과학기술용어시소러스
열대류. --과학기술용어시소러스
부정류 (수력) --과학기술용어시소러스
회전류. --과학기술용어시소러스
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