|
|
|
한국하천호수학회 / v.44, no.1, 2011년, pp.66-74 
|
점착성 및 비점착성 유사의 밀도성층화에 따른 난류 영향에 대한 수치연구
( A Numerical Study on Turbulent Damping Effect due to Density Stratification of Cohesive and Noncohesive Sediment ) |
| 손민우;이관홍;이두한; 인하대학교 자연과학대학;인하대학교 자연과학대학;한국건설기술연구원;
|
|
|
 |
|
| |
| 초 록 |
|
|
| This numerical study aims to investigate the effect of cohesive sediment on turbulence structure due to density stratification. The transport model for cohesive sediment incorporated with flocculation model has been selected and calculates the concentration, fluid momentum, and turbulence. From the model results, it is known that suspension of sediment decreases turbulence intensity. It is also found that cohesive sediment has a relatively weak effect on turbulence damping compared to noncohesive sediment. The low settling velocity and more suspension of cohesive sediment are considered to be mechanisms of this behavior. Richardson number determined with results of this study quantitatively shows that cohesive sediment causes less stable density stratification condition and, as a result, the turbulence structure is less damped compared to the case of noncohesive sediment. |
| |
| 키워드 |
| cohesive sediment;flocculation model;turbulence;density stratification;richardson number; |
| |
|
|
|
|
한국하천호수학회지 / v.44, no.1, 2011년, pp.66-74
한국하천호수학회
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201118565335342)
언어 : 한국어 |
|
| 논문 제공 : KISTI 한국과학기술정보연구원 |
|
|
|
|
|
|
