Eulerian–Eulerian two-phase numerical simulation of nanofluid laminar forced convection in a microchannel

• Published in: The International journal of heat and fluid flow 2011-02, Vol.32 (1), p.107-116
• Main Authors: Kalteh, Mohammad, Abbassi, Abbas, Saffar-Avval, Majid, Harting, Jens
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemistry; Colloidal state and disperse state; Computer simulation; Condensed matter: structure, mechanical and thermal properties; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fluid flow; General and physical chemistry; Heat transfer; Laminar; Mathematical models; Microchannel; Microchannels; Nanocomposites; Nanofluid; Nanofluids; Nanomaterials; Nanostructure; Phases; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Physics; Theoretical studies. Data and constants. Metering; Thermal properties of condensed matter; Thermal properties of small particles, nanocrystals, nanotubes; Two-phase
• ISSN: 0142-727X; 1879-2278
• DOI: 10.1016/j.ijheatfluidflow.2010.08.001

In this paper, laminar forced convection heat transfer of a copper–water nanofluid inside an isothermally heated microchannel is studied numerically. An Eulerian two-fluid model is considered to simulate the nanofluid flow inside the microchannel and the governing mass, momentum and energy equations for both phases are solved using the finite volume method. For the first time, the detailed study of the relative velocity and temperature of the phases are presented and it has been observed that the relative velocity and temperature between the phases is very small and negligible and the nanoparticle concentration distribution is uniform. However, the two-phase modeling results show higher heat transfer enhancement in comparison to the homogeneous single-phase model. Also, the heat transfer enhancement increases with increase in Reynolds number and nanoparticle volume concentration as well as with decrease in the nanoparticle diameter, while the pressure drop increases only slightly.