서지주요정보
Low-Reynolds-number k-ε models for separated and reattaching flows = 난류박리 및 재부착 유동해석을 위한 저레이놀즈수 k-ε 난류모델
서명 / 저자 Low-Reynolds-number k-ε models for separated and reattaching flows = 난류박리 및 재부착 유동해석을 위한 저레이놀즈수 k-ε 난류모델 / Tae-Seon Park.
발행사항 [대전 : 한국과학기술원, 1996].
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소장정보

등록번호

8006190

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 96017

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초록정보

Two versions of k-ε turbulence model are proposed to compute turbulent separated and reattaching flows. In the first version, a nonlinear low-Reynolds-number $k-ε$ model is developed. In this model, the limiting near-wall behavior and nonlinear Reynolds stress representations are incorporated. Emphasis is placed on the adoption of $R_y (\equiv \sqrt{k} y /ν)$ instead of $y^+ (\equiv u_{τ}y /ν)$ in the low-Reynolds-number model for predicting turbulent separated and reattaching flows. The non-equilibrium effect is examined to describe the recirculating flows away from the wall. In the second version, a new $k-ε-f_{μ}$ turbulence model is proposed, which can be applied to complex flows involving multiple surfaces. The wall-damping function $f_{μ}$ is obtained by solving the elliptic $f_{μ}$ equation. Emphasis is placed on the formulation of the $f_{μ}$ equation in a general coordinate system. The near-wall effect, without reference to distance, is fully incorporated in this model. The non-equilibrium effect is examined to describe recirculating flows away from the wall. A modified model of the ε-equation is developed to account for the local anisotropy in strongly strained turbulent flows. A finite volume code based on SIMPLEC is developed for calculation of steady and incompressible flows with complex irregular boundaries. In this code, a third-order accurate convective scheme is implemented for non-uniform grid and three-dimensional version of strongly implicit procedure (SIP) is developed. The present models are validated by solving the benchmark problem of turbulent flow behind a backward-facing step and other complex turbulent flow. The predictions of the present model are cross-checked with the existing measurements and DNS data. The model performances are shown to be generally satisfactory.

서지기타정보

서지기타정보
청구기호 {DME 96017
형태사항 xi, 121 p. : 삽도 ; 26 cm
언어 영어
일반주기 Appendix : A, Evaluation of pressure and cross diffusion terms. - B, Modification for two-dimensional axisymmetric problem. - C, Order-of-magnitude analysis
저자명의 한글표기 : 박태선
지도교수의 영문표기 : Hyung-Jin Sung
지도교수의 한글표기 : 성형진
수록잡지명 : "A nonlinear Low-Reynolds-number k-ε model for turbulent separated and reattaching flows - (I) flow field computation". International Journal of Heat and Mass Transfer, vol. 38, no. 14, pp. 2657-2666
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 Reference : p. 103-115
주제 Separated and reattaching flow
Low-Reynolds-number k-\varepsilon turbulence model
박리와 재부착유동
저레이놀즈수 k-\varepsilon 난류모델
QR CODE qr code