Abstract
The present study proposes a modified temperature-dependent non-Newtonian viscosity model and investigates the How characteristics and heat transfer enhancement of the viscoelastic non-Newtonian fluid in a 2:1 rectangular duct. The combined effects of temperature dependent viscosity, buoyancy, and secondary flow caused by the second normal stress difference are considered. Calculated Nusselt numbers by the modified temperature-dependent viscosity model give good agreement with the experimental results. The heat transfer enhancement of viscoelastic fluid in a rectangular duct is highly dependent on the secondary flow caused by the magnitude of second normal stress difference.
| Original language | English |
|---|---|
| Pages (from-to) | 382-390 |
| Number of pages | 9 |
| Journal | Journal of Mechanical Science and Technology |
| Volume | 20 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2006 |
Keywords
- Non-Newtonian Fluid
- Non-Newtonian Viscosity Model
- Second Normal Stress Difference
- Temperature-Dependent Viscosity Model
- Viscoelastic Fluid