Abstract
A low Re number Reynolds-stress model was presented based on a drag reducing flow in a channel described by the Giesekus constitutive equation. Through comparing with the results of DNS, it is confirmed that the proposed model can correctly predict some variables such as the mean velocity, mean conformations, drag reduction rate and mean stresses; whereas the prediction accuracy of the mean velocity profiles and the root mean square velocity fluctuations needs to be improved. On the other hand, the modeling of Reynolds-stress redistribution term (or pressure-strain correlation) still needs modification.
| Original language | English |
|---|---|
| Pages (from-to) | 611-614 |
| Number of pages | 4 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 30 |
| Issue number | 4 |
| State | Published - Apr 2009 |
Keywords
- Drag-reduction
- Reynolds-stress model
- The turbulence model
- Viscoelasticity