Abstract

VASCO-CALLE, Diego Andrés; CHEN, Daming  and  ACEVEDO-CABELLO, Jorge. Computational simulation of laminar heat convection of nanofluids in a circular tube and squared duct. Dyna rev.fac.nac.minas [online]. 2016, vol.83, n.196, pp.113-118. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v83n196.49897.

Nanofluids are colloidal suspensions of nanometer-sized particles (metals, metallic oxides or carbon nanotubes) in a base fluid (polar or non-polar). Nanofluids have interesting properties that make them useful especially in the design of compact heat transfer equipment. Laminar convective heat transfer of nanofluids (water, Al₂O₃) in a square and circular ducts has been studied numerically using the software ANSYS/FLUENT 12.1. Results for the Nusselt number, skin coefficient friction, temperature and velocity profiles are presented for four nanoparticle volume fractions ( = 0 - 20%) and Reynolds numbers (Re = 800, 1300 and 2000). For the studied Re numbers, Nu is decreased by 12% and 10%, when is increased from 0% to 10% and from 10% to 20%, respectively. Regard to the skin friction factor, the obtained value is increased around a 30% when is increased 10%.

Keywords : nanofluids; CFD; laminar-forced convection.

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