Abstract
In this study, experiments were performed by six different volume fractions of Al2O3 nanoparticles in distilled water. Then, actual nanofluid Nusslet number compared by Adaptive neuro fuzzy inference system (ANFIS) predicted number in square cross-section duct in laminar flow under uniform heat flux condition. Statistical values, which quantify the degree of agreement between experimental observations and numerically calculated values, were found greater than 0.99 for all cases.
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Abbreviations
- ARE:
-
Average relative error
- AARE:
-
Absolute average relative error
- MSE:
-
Mean square error
- RMSE:
-
Root Mean square error
- ANFIS:
-
Adaptive neuro fuzzy inference system
- FIS:
-
Fuzzy inference system
- CHF:
-
Critical heat flux
- X, Y, and Z:
-
Linguistic variables
- ai, bi, and ci:
-
Parameter set
- μA(x), and μB(x):
-
Membership function
- A:
-
Surface area of the square cross-section duct (m2)
- Cp:
-
Specific heat (kJ kg−1 K−1)
- Dh :
-
Hydraulic diameter (m)
- \( \overline{\text{h}}_{\text{nf}} (\exp ) \) :
-
Experimental average heat transfer coefficient of Nanofluid (W m−2 K−1)
- K:
-
Thermal conductivity (W m−1 K−1)
- L:
-
Duct length (m)
- Nu (exp):
-
Experimental average Nusselt number of Nanofluid
- Nu (th):
-
Nanofluid Nusselt number calculated from Seider–Tate equation
- Pe:
-
Peclet number
- Pr:
-
Prandtl number
- Q:
-
Heat flux (W)
- Re:
-
Reynolds number
- Tb :
-
Bulk temperature (K)
- Tw :
-
Duct wall temperature (K)
- \( \overline{\text{U}} \) :
-
Average fluid velocity (m s−1)
- μ:
-
Viscosity (Pa s)
- μwnf :
-
Nanofluid viscosity at duct wall temperature (Pa s)
- \( \phi \) :
-
Nanoparticle volume fraction (%)
- ρ:
-
Density (kg m−3)
- nf:
-
Nanofluid
- s:
-
Solid nanoparticles
- w:
-
Water
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An erratum to this article is available at http://dx.doi.org/10.1007/s00231-015-1566-7.
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Salehi, H., Zeinali-Heris, S., Esfandyari, M. et al. Nero-fuzzy modeling of the convection heat transfer coefficient for the nanofluid. Heat Mass Transfer 49, 575–583 (2013). https://doi.org/10.1007/s00231-012-1104-9
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DOI: https://doi.org/10.1007/s00231-012-1104-9