Numerical Investigations of Flow and Heat Transfer Characteristics of Water Based CuO and Al2O3 Nanofluids Using Two-Phase Mixture Model

Numerical Investigations of Flow and Heat Transfer Characteristics of Water Based CuO and Al2O3 Nanofluids Using Two-Phase Mixture Model

Sahin, Bayram
Bölükbasi, Abdurahim
Bedir, Özgür
Çomakli, Ömer

The development of high-performance thermal systems has increased interest in heat transfer enhancement techniques. The application of additives to heat transfer liquids is one of the noticeable effort to enhance heat transfer. The stable suspensions of nanoparticles (typically < 100 nm) in liquids are called nanofluids. In this study, heat transfer characteristics of two different nanofluids flowing through a circular tube under constant heat flux condition have been investigated numerically. Fluent 6.3 has been used this numerical study. Two-phase mixture model has been implemented two solve the problem. The comparison has been made between calculated and experimental results. The suspended nanosized particles enhance heat transfer and Nusselt numbers by comparing pure water at the same Reynolds numbers. Moreover, pressure drops for the nanofluids is approximately the same as that of pure water. The nanofluids containing CuO has showed bigger heat transfer enhancement than Al2O3 in all volume fraction rates.

Conference or Workshop Item
PeerReviewed

2009-06

489