Abstract
In this paper, we use the modified decomposition method (MADM), a recent mathematical technique to find closed-form solutions of the singular nonlinear heat transfer equation of a longitudinal triangular moving fin when all the thermal parameters vary with the temperature. The energy balance equation for the triangular moving fin is solved using the MADM. The results are compared with those obtained using the differential transform method and numerical solutions obtained using the spectral quasi-linearization method. The effects of the various thermo-physical parameters, such as thermal conductivity parameter, power exponent of heat transfer coefficient, surface emissivity parameter, convection–conduction parameter, radiation–conduction parameter, convection sink temperature, radiation sink temperature, heat generation parameter, and the Peclet Number on the temperature distribution and, therefore, energy transfer efficiency are analyzed.
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Abbreviations
- \(N_\mathrm{r}\) :
-
Radiation–conduction parameter
- C :
-
Constant which represents the temperature
- k :
-
Temperature-dependent thermal conductivity [W/( mK)]
- \(k_\mathrm{a} \) :
-
Thermal conductivity corresponding to ambient condition [W/(mK)]
- \(\varepsilon _\mathrm{s} \) :
-
Surface emissivity corresponding to radiation sinks temperature, \(T_\mathrm{s} \)
- T :
-
Temperature (K)
- P :
-
Fin perimeter (m)
- \(T_\mathrm{b} \) :
-
Fin’s base temperature (K)
- \(T_\mathrm{a} \) :
-
Sink temperature corresponding to \({k_\mathrm{a}}\) (K)
- \(T_\mathrm{s} \) :
-
Sink temperature for radiation (K)
- L :
-
Length of the fin (m)
- x :
-
Axial coordinate of the entire fin (m)
- \(A_x \) :
-
Cross-sectional area of the elementary section of fin at location x (\(\hbox {m}^{2})\)
- X :
-
Dimensionless spatial coordinate
- A :
-
Thermal conductivity parameters
- B :
-
Surface emissivity parameters
- \(\varepsilon _G \) :
-
Heat generation parameters
- G :
-
Heat generation number
- Pe :
-
Peclet number
- U :
-
Velocity of the fin
- \(C_p \) :
-
Specific heat of the fin material
- \(t_\mathrm{b} \) :
-
Base thickness of the fin
- \(\alpha \) :
-
Slope of the thermal conductivity–temperature curve (\(\hbox {K}^{-1}\))
- \(\beta \) :
-
Slope of the surface emissivity–temperature curve (\(\hbox {K}^{-1}\))
- \(\gamma \) :
-
Slope of the heat generation–temperature curve (\(\hbox {K}^{-1}\))
- \(\theta \) :
-
Dimensionless temperature of the fin
- \(\theta _\mathrm{a} \) :
-
Dimensionless convective sink temperature
- \(\theta _\mathrm{s} \) :
-
Dimensionless radiations sink temperature
- \(\sigma \) :
-
Stefan–Boltzmann constant
- \(\varepsilon \) :
-
Emissivity
- \(\rho \) :
-
Density of the fin materials
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Roy, P.K., Mallick, A., Mondal, H. et al. A Modified Decomposition Solution of Triangular Moving Fin with Multiple Variable Thermal Properties. Arab J Sci Eng 43, 1485–1497 (2018). https://doi.org/10.1007/s13369-017-2983-3
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DOI: https://doi.org/10.1007/s13369-017-2983-3