Direct-contact condensation heat transfer with noncondensable gases and interfacial shear for co-current stratified wavy flow in nearly-horizontal channels = 거의 수평인 사각관내의 동방향 성층 파동류에서 불응축성 기체가 존재할 경우의 직접 접촉 응축 열전달과 계면 전단응력

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The calibrating method for an electrochemical probe, neglecting the effect of the normal velocity on the mass transport, can cause large errors when applied to the measurement of wall shear rates in thin wavy flow with large amplitude waves. An extended calibrating method is developed to consider the contributions of the normal velocity. The turbulence-induced normal velocity component is included into the 2-D mass transport equation by means of its root mean square value multiplied by a random function. The wave-induced normal velocity component is postulated to be proportional to the normal interfacial velocity in thin wavy flow. The inclusion of the turbulence-induced normal velocity term is found to have a negligible effect on the mass transfer coefficient. The contribution of the wave-induced normal velocity can be classified on the dimensionless parameter, V. If V is above a critical value of V, $V_{crit}$, the effects of the wave-induced normal velocity become larger with an increase in V. While its effects negligible for $V
Advisors
No, Hee-Cheonresearcher노희천researcher
Description
한국과학기술원 : 원자력공학과,
Publisher
한국과학기술원
Issue Date
1998
Identifier
143436/325007 / 000935367
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 원자력공학과, 1998.8, [ xvii, 284 p. ]

Keywords

Interfacial shear; Horizontal; Co-current; Condensation; Stratified flow; 층류; 계면; 수평; 동방향; 응축

URI
http://hdl.handle.net/10203/48890
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=143436&flag=dissertation
Appears in Collection
NE-Theses_Ph.D.(박사논문)
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