Abstract
The viscous characteristics of ethylene glycol (EG) solution with flow drag reduction additive have been investigated experimentally. In this study, oleyldihydoroxyetyl amineoxide (ODEAO) was used as the flow drag reduction additive, and an aqueous solution of EG was used as a secondary refrigerant. The viscosity of the EG solution with ODEAO was measured with a rotational rheometer. The experimental parameters of viscosity measurement were the temperature of the EG solution with ODEAO, the ODEAO concentration, and the EG concentration. From the experimental results, the apparent viscosity of the EG solution with ODEAO showed SIS (shear induced state). The non-linear dependence of shear stress on shear rate has been well approximated by the power-law model under high shear conditions. The power-law contents, pseudoplastic viscosity, and index number have been estimated for each experimental parameter. Using the measured viscosity and non-dimensional analysis, the flow drag and heat transfer reduction effect of the EG solution with ODEAO has been investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 553-567 |
| Number of pages | 15 |
| Journal | Heat Transfer - Asian Research |
| Volume | 35 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Dec 1 2006 |
Keywords
- Apparent viscosity
- Flow drag reduction effect
- Secondary refrigerant
- Surfactant
ASJC Scopus subject areas
- Condensed Matter Physics
- Fluid Flow and Transfer Processes