Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)
- Volume 20 Issue 8
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- Pages.2572-2592
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- 1996
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- 1226-4881(pISSN)
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- 2288-5324(eISSN)
DOI QR Code
Development of Low-Reynolds-Number Ssecond Moment Turbulence Closure by DNS Data
DNS 자료에 의한 저레이놀즈수 2차 모멘트 난류모형의 개발
- Sin, Jong-Geun (Dept.of Mechanical Engineering, Graduate School of Korea University) ;
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Choe, Yeong-Don
(Dept.of Mechanical Engineering, Korea University)
- Published : 1996.08.01
Abstract
A low-Reynolds-number second moment turbulence closure was developed with the aid of DNS data. Model coefficients of nonlinear return to isotropy term were derived by use of Cayley-Hamilton theorem and two component turbulence limit condition as the functions of invariances of anisotropy and turbulent Reynolds number. Launder and Tselepidakis' cubic mean pressure strain model was modified to fit the predicted pressure-strain components to the DNS data. Two component turbulence limit condition was the precondition to be satisfied in developing the second moment turbulence closure for the realizable Reynolds stress prediction. But the satisfactions of Reynolds stress level and pressure-strain level of each component were compromised because the satisfaction of both levels was impossible.
Keywords
- Low-Reynolds-Number;
- Flatness Parameter;
- Reynolds Stress;
- Pressure-Stain Correlation;
- Two Component Turbulent Limit
- 저레이놀즈수;
- 편평계수;
- 레이놀즈응력;
- 압력-변형 상관관계;
- 2-성분 난류극한;