New Viscosity Data for CuO-water Nanofluid -The Hysteresis Phenomenon Revisited

Nguyen Cong Tam (1) , Nicolas Galanis (2) , Thierry Maré (3) , Erwan Eveillard (4)

1 université de Moncton
2 UdeS - Université de Sherbrooke
3 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
4 université moncton

In the present work, we have experimentally investigated the stability and hysteresis behaviors of CuO-water nanofluid when submitted to a repeated heating and cooling process. Data has shown that for a low particle volume concentration, 1.6% in particular, the hysteresis phenomenon did not occur for the temperature range considered. For a higher particle concentration, 5% in particular, the hysteresis behaviour was clearly observed when fluid temperature exceeded 52ºC approximately. Beyond this critical temperature, the nanofluid viscosity has increased, and such an increase even continued with a decrease of temperature during the cooling phase. Subsequent measured viscosity and observations in laboratory after the first occurrence of the hysteresis phenomenon have confirmed that the alterations on the particle suspension and on the nanofluid stability appear indeed permanent. Such alterations were found to worsen with further heating/cooling cycles.

Domaines: Thermique [physics.class-ph]; Thermique [physics.class-ph]

Nguyen Cong Tam, Nicolas Galanis, Thierry Maré, Erwan Eveillard. New Viscosity Data for CuO-water Nanofluid -The Hysteresis Phenomenon Revisited. Advances in Science and Technology, 2010, 81, pp.101-106. ⟨10.4028/www.scientific.net/AST.81.101⟩. ⟨hal-00992604⟩