ASSESSMENT OF SINGLE AND TWO-PHASE MODELS FOR NANOFLUID FLOW AT THE ENTRANCE REGION OF A UNIFORMLY HEATED TUBE
ASME International Mechanical Engineering Congress and Exposition, Texas, Amerika Birleşik Devletleri, 9 - 15 Kasım 2012, ss.1583-1591, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Basıldığı Şehir: Texas
- Basıldığı Ülke: Amerika Birleşik Devletleri
- Sayfa Sayıları: ss.1583-1591
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
Hydrodynamic and thermal characteristics of Al2O3-water nanofluid flow at entry region of a uniformly heated pipe are studied applying finite control volume method (FCV). Single phase and Eulerian-Eulerian two-phase models were used in modelling of nanofluid flow and heat transfer. The two methods are evaluated by comparing predicted convective heat transfer coefficients and friction factor with experimental results from literature. Solutions with two different velocity pressure coupling algorithms, Full Multiphase Coupled, and Phase Coupled Semi-Implicit Method for Pressure Linked Equations are also compared in terms of accuracy and computational cost. Two-phase model predicts convective heat transfer coefficient and friction factor more accurately at the entry region. Moreover, computational cost can