Improvement of hydrauclic scheme in TRAC using the 3-field model = 3-field model을 이용한 TRAC의 수력학 체계의 개선

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TRAC-PF1 is modified to include the 3-field governing equations and physical model related to the droplet field. In deriving the present 3-field model, the droplet equation of motion used in the study of Varone and Rohsenow is used to calculate the relative velocity of the droplet and gas. The governing equations and physical models related to the droplet field are based on the 3-field model of COBRA-TF and the finite difference equations of these modified governing equations are derived in the form of TRAC-PF1. New solution matrix elements are derived and these are adopted to the solution step of TRAC-PF1. The simulation results by the modified code are compared with these from Ishii``s equilibrium entrainment correlation. It is found out that the simulation results depend on inlet void fraction and pipe diameter. When inlet void fraction is 0.9 or higher and the pipe diameter is larger than 3cm, the simulation results approach Ishii``s correlation.
Advisors
No, Hee-Cheonresearcher노희천researcher
Description
한국과학기술원 : 원자력공학과,
Publisher
한국과학기술원
Issue Date
2000
Identifier
158117/325007 / 000983402
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력공학과, 2000.2, [ vii, 61 p. ]

Keywords

3-field model; TRAC

URI
http://hdl.handle.net/10203/49420
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=158117&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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