We showed that solutions by the Haar wavelet-quasilinearization technique for the two problems, namely, (i) temperature\ndistribution equation in lumped system of combined convection-radiation in a slab made of materials with variable thermal\nconductivity and (ii) cooling of a lumped system by combined convection and radiation are strongly reliable and alsomore accurate\nthan the other numerical methods and are in good agreement with exact solution. According to theHaar wavelet-quasilinearization\ntechnique, we convert the nonlinear heat transfer equation to linear discretized equation with the help of quasilinearization\ntechnique and apply the Haar wavelet method at each iteration of quasilinearization technique to get the solution. The main aim of\npresent work is to show the reliability of the Haar wavelet-quasilinearization technique for heat transfer equations.
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