In this study, a numerical simulation is used to analyze heat-exchange behaviors of a double tube heat exchanger with a staggered oval cross-section pipe as the inner pipe. In addition, non-Newtonian nanofluid and water are considered to be the working fluid, respectively flowing in the inner tube and outer tube. The non-Newtonian nanofluid is composed of non-Newtonian base fluid and nanoparticle. Besides, a single-phase fluid model was adopted. The purpose of this study is to investigate the heat exchange behavior of non-Newtonian nanofluid concerning different flow behavior index, the inlet velocity and nanoparticle volume fraction. Therefore, the velocity distribution, isotherms contours, synergy angle distribution, the Nusselt number, pressure drop and performance evaluation criterion (PEC) had been studied and calculated. It can be discovered that the heat transfer performance becomes better when the flow behavior index decreases; the inlet velocity of the inner pipe decreases; the inlet velocity of the outer pipe increases and nanoparticle volume fraction decreases.
|Translated title of the contribution||Thermal Analysis on Non-Newtonian Nanofluid in Double Tube Heat Exchanger with Staggered Oval Cross-section Pipe as Inner Pipe|
|Original language||Chinese (Traditional)|
|Number of pages||14|
|Journal||Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao|
|Publication status||Published - 2020 Dec|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering