TY - JOUR
T1 - Numerical Investigation of Heat Transfer Enhancement of a Water/Ethylene Glycol Mixture with Al2O3-TiO2 Nanoparticles
AU - Alshehri, Fahad
AU - Goraniya , Jaydeep
AU - Combrinck, Madeleine
PY - 2020/3/15
Y1 - 2020/3/15
N2 - This paper presents a numerical study of a four-component hybrid nanofluid consisting of binary nanoparticles, Al
2O
3 and TiO
2, dispersed into a double base fluid mixture of water and ethylene glycol. The nanofluid were modeled as a single phase fluid with volume concentrations of 2.5% Al
2O
3–1.5% TiO
2 and 5% Al
2O
3–3% TiO
2 respectively. The nanoparticles are suspended in a double base fluid of water and ethylene glycol mixture with a 70:30 vol ratio. The simulations were conducted for turbulenct flow through a pipe at working temperatures of 293 K and varying Reynolds numbers (7800–2000). Constant heat flux of 129,983 W/m
2 heat flux was applied to the pipe wall. The thermal conductivity was enhanced by 24% and 11% at concentrations of 5–3% and 2.5–1.5%, respectively. While, viscosity of hybrid nanofluids was rising up to 70% and 67% at the same concentration. The avarage heat transfer coefficient of Al
2O
3–TiO
2 hybrid nanofluids were enhanced with increase of temperature and volume concentration. It was noted that the maximum heat transfer enhancement is 52% higher than the base fluid for a volume concentration of 5–3%. There is a slight increase in the friction factor of Al
2O
3–TiO
2 hybrid nanofluids with higher volume concentration.
AB - This paper presents a numerical study of a four-component hybrid nanofluid consisting of binary nanoparticles, Al
2O
3 and TiO
2, dispersed into a double base fluid mixture of water and ethylene glycol. The nanofluid were modeled as a single phase fluid with volume concentrations of 2.5% Al
2O
3–1.5% TiO
2 and 5% Al
2O
3–3% TiO
2 respectively. The nanoparticles are suspended in a double base fluid of water and ethylene glycol mixture with a 70:30 vol ratio. The simulations were conducted for turbulenct flow through a pipe at working temperatures of 293 K and varying Reynolds numbers (7800–2000). Constant heat flux of 129,983 W/m
2 heat flux was applied to the pipe wall. The thermal conductivity was enhanced by 24% and 11% at concentrations of 5–3% and 2.5–1.5%, respectively. While, viscosity of hybrid nanofluids was rising up to 70% and 67% at the same concentration. The avarage heat transfer coefficient of Al
2O
3–TiO
2 hybrid nanofluids were enhanced with increase of temperature and volume concentration. It was noted that the maximum heat transfer enhancement is 52% higher than the base fluid for a volume concentration of 5–3%. There is a slight increase in the friction factor of Al
2O
3–TiO
2 hybrid nanofluids with higher volume concentration.
KW - Hybrid nano fluid
KW - Performance factor
KW - Single phase approximation
KW - Thermal conductivity
KW - Viscosity
U2 - 10.1016/j.amc.2019.124836
DO - 10.1016/j.amc.2019.124836
M3 - Article
VL - 369
JO - Applied Mathematics and Computation
JF - Applied Mathematics and Computation
SN - 0096-3003
M1 - 124836
ER -