Self-heating process 20 stirring

Now, the Semenov equation is certainly based on the nonstationary theory of the thermal explosion, because this equation holds on the assumption that the spatial distribution of temperature in a fluid fdled in the container and placed in the atmosphere maintained at a temperature situated below the critical state for the thermal explosion, is uniform (refer to Section 1.2). In this regard, it has been ascertained in a series of studies, which are described in Subsections 5.5.3 and 5.7.2, as well that the spatial distribution of temperature in an arbitrary volume of a liquid charged in an arbitrary container and placed in the atmosphere under isothermal conditions is perfectly uniform in the early stages of the self-heating process, except the thin upper surface layer, even if it is not stirred mechanically [18]. 

Based on the above ascertainment, the spatial distribution of temperature in the mass of a liquid in the early stages of the self-heating process has been assumed to be as uniform as that in a normal gas throughout a series of studies, with regard to the values of 7). for liquids, described in the present chapter, even if the liquid is not mechanically stirred. 

As stated repeatedly herein, however, whether the thermal explosion of an arbitrary volume of a liquid charged in an arbitrary container and placed in the (static) atmosphere under isothermal conditions occurs or not is decided by the ratio of the rate of heat generation in the liquid to the rate of heat transfer from the liquid to the atmosphere at the critical state for the thermal explosion which exists at the end of the early stages of the self-heating process. This orthodox approach to the thermal explosion research of every liquid has thus no concern with any convective flow inliquids. In this regard, Semenov did not leave any comment, to the effect that stirring is indispensable in the thermal explosion research of every self-heating fluid, either [3]. 

---