Abstract
This article mainly focuses on the energy transfer with the effects of carbon nanotubes (CNTs) of magnetohydrodynamic (MHD) nanofluids flow past a stretching sheet under thermal radiation and Newtonian heating. Single and multi-wall CNTs are considered in water as convectional based fluid. With the help of similarity transformations, the nonlinear ODEs are obtained from system of PDEs. Closed form analytic solutions are obtained for velocity, temperature, and concentration. These solutions are plotted and discussed for pertinent parameters. The results indicate that temperature of CNTs-water–based nanofluid is higher than CNTs-engine oil (or kerosene). Further, heat transfer rate increases due to suspension of CNTs.
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Abbreviations
- B 0 :
-
strength of magnetic field
- C :
-
species concentration
- (c p)nf :
-
nanofluid heat capacity
- D f :
-
mass diffusivity of base fluid
- D nf :
-
nanofluid mass diffusivity
- h s :
-
heat transfer coefficient
- k :
-
permeability
- k 1 :
-
mean absorption coefficient
- k f :
-
thermal conductivity of base fluid
- k CNT :
-
carbon nanotubes thermal conductivity
- K nf :
-
nanofluid thermal conductivity
- M :
-
magnetic parameter
- P :
-
porosity parameter
- Pr:
-
Prandtl number
- q r :
-
radiative heat flux
- Sc :
-
Schmidt number
- T :
-
temperature of the fluid
- T ∞ :
-
ambient temperature
- α nf :
-
nanofluid thermal diffusivity
- γ :
-
conjugate parameter for Newtonian heating
- μ f :
-
base fluid dynamic viscosity
- μ nf :
-
nanofluid dynamic viscosity
- ρ f :
-
density of base fluid
- ρ CNT :
-
carbon nanotubes density
- ρ nf :
-
nanofluid density
- σ ∗ :
-
Stefan–Boltzmann constant
- σ f :
-
electric conductivity of base fluid
- σ CNT :
-
carbon nanotubes electric conductivity
- σ nf :
-
nanofluid electric conductivity
- θ :
-
dimensionless temperature
- Φ :
-
dimensionless concentration
- ϕ :
-
nanoparticle volume fraction
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Funding
The research is supported by China Postdoctoral Science Foundation (Grant No. 2018M643156).
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Hussanan, A., Khan, I., Gorji, M.R. et al. CNTS-Water–Based Nanofluid Over a Stretching Sheet. BioNanoSci. 9, 21–29 (2019). https://doi.org/10.1007/s12668-018-0592-6
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DOI: https://doi.org/10.1007/s12668-018-0592-6