*2.1. Initial Conditions*

$$\begin{array}{l} \mbox{(i)}.\,\,\overline{\boldsymbol{\pi}} = \boldsymbol{0},\\ \mbox{(ii)}.\,\,\overline{\boldsymbol{\pi}} = \boldsymbol{0},\\ \mbox{(iii)}.\,\,\overline{\boldsymbol{\varpi}} = \boldsymbol{0},\\ \mbox{(iv)}.\,\,\overline{T} = \overline{T}\_{0\prime} \\ \mbox{(v)}.\,\,\overline{h}(\overline{\boldsymbol{\}}) = h\_{0} \end{array} \mbox{; when } \overline{t} = \boldsymbol{0} \tag{6}$$

here, *h*, *h*<sup>0</sup> and *T*<sup>0</sup> represent thickness of the film, initial thickness of the film and room temperature respectively.
