Computational simulation of laminar heat convection of nanofluids in a circular tube and squared duct

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 (j = 0 - 20%) and Reynolds numbers (Re = 800, 1300 and 2000). For the studied Re numbers, Nu is decreased by 12% and 10%, when j 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 j is increased 10%.

• Autores: Vasco Calle, Diego Andrés; Chen, Daming; Acevedo Cabello, Jorge
• Tipo de recurso: Article of journal
• Fecha de publicación: 2016
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/60555
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/60555; http://bdigital.unal.edu.co/58887/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; nanofluids; CFD; laminar-forced convection
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional