Solution and Analysis of Non-Fourier Heat Conduction in a Solid Sphere under Arbitrary Periodic Surface Thermal Disturbance[J]. 2014, 48(1): 13-18.
DOI:
Solution and Analysis of Non-Fourier Heat Conduction in a Solid Sphere under Arbitrary Periodic Surface Thermal Disturbance[J]. 2014, 48(1): 13-18.DOI: 10.7652/xjtuxb201401003.
Solution and Analysis of Non-Fourier Heat Conduction in a Solid Sphere under Arbitrary Periodic Surface Thermal Disturbance
In order to investigate the characteristics of thermal wave propagating in a solid sphere under arbitrary periodic surface thermal disturbance
the hyperbolic heat conduction equation was employed to describe this problem involving high-rate change of temperature. When the solid sphere surface is subjected to a sudden temperature change or a harmonic temperature change
the analytic solution of this problem is obtained by using the separation of the variables method and the Duhamel's principle. Then the analytic solution of temperature field is achieved by using the Fourier series and the principle of superposition when the solid sphere surface is subjected to an arbitrary periodic temperature change. Using the obtained analytical solution
the temperature profiles of the solid sphere were analyzed
and the differences between the temperature response obtained by using the non-Fourier heat conduction model and that by using the Fourier model were discussed. The results show that there exists an orderly series of ‘jump points' at temperature response curve which obtained by using the non-Fourier heat conduction model; and the amplitude of the temperature wave attenuates with the decrease of thermal relaxation. This solution can be applied for more realistic periodic boundary conditions occurring in engineering.
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