Adjustment process of a contained gas to a change in the boundary temperature = 벽면 온도의 변화에 의한 용기내의 기체의 접근 과정에 관한 연구

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Numerical solutions are obtained for transient natural convection of a compressible fluid in a closed vessel at high Rayleigh number motions are driven by abruptly lowering the temperature at the entire walls of the vessel. Main emphasis will be placed on describing the flow evolutions of a non-Boussinesq fluid. Specifically, numerical solutions are sought by intergrating the full, time-dependent Navier-Stokes equations for nitrogen gas in a vertically-mounted circular cylinder. All terms are retained in the governing equations. Numerical results provided the details of flow and temperature are fields in the transient process. When the aspect ratio (height/diameter) is smaller than one, the evolution of the temperature field is highly oscillatory. The oscillation frequency is comparable to the internal gravity wave frequency; this is consistent with the previous analytical predictions. Numerically-constructed contour maps showing temperature and velocity fields are presented to illustrate the effect of the aspect ratio of the vessel.
Advisors
Hyun, Jae-Minresearcher현재민researcher
Description
한국과학기술원 : 기계공학과,
Publisher
한국과학기술원
Issue Date
1988
Identifier
66420/325007 / 000861453
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 1988.2, [ iv, 47 p. ]

URI
http://hdl.handle.net/10203/46840
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=66420&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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