서지주요정보
경계층내에서의 천이 모형을 위한 연구 = A study for modelling of laminar to turbulent transition in the boundary layers
서명 / 저자 경계층내에서의 천이 모형을 위한 연구 = A study for modelling of laminar to turbulent transition in the boundary layers / 백성구.
저자명 백성구 ; Baek, Seong-Gu
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007623

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 97043

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리뷰정보

초록정보

An evaluation of the capability of low-Reynolds-number k-ε turbulence models and an approach for improving the models to predict transition in external boundary layer flows subject to free-stream turbulence are presented. By comparing calculations of a number of transitional boundary layers by five k-ε models(Jones-Launder, Launder-Sharma, Nagano-Hishida, Nagano-Tagawa, Yang-Shih), Launder-Sharma model is selected as a best performaning one and it is employed in a series of computational tests to examine the ability of this model for reliable prediction of transitions. Modifications are proposed in source terms of ε-equation proposed by Launder-Sharma model. A near-wall modifications is also made to k-ε-γ model. It is found that these modifications lead to improved predictions of transitional boundary layers. The fact that the latter shows better performance than the former in transition onset and length suggests that intermittency factor must be taken into account in the laminar to turbulent transition modelling.

서지기타정보

서지기타정보
청구기호 {MME 97043
형태사항 v. 53 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Seong-Gu Baek
지도교수의 한글표기 : 성형진
공동교수의 한글표기 : 정명균
지도교수의 영문표기 : Hyung-Jin Sung
공동교수의 영문표기 : Myung-Kyoon Chung
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 26-30
주제 천이모형
경계층유동
간헐도
Transition model
Boundary layer flows
Intermittency
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