In nature and technology there are numerous processes involving phase transitions from the initially paraphrasing in apa type – the liquid-vapor. Contemporary technology, in particular transport and power business, primarily based on the conversion of prospective energy of the fuel into kinetic power, exactly where the fundamental method could be the operating fluid passage from the liquid to the gaseous state. The raise in heat capacity and thermal processes intensification devices results in the truth that the phase transition liquid-vapor precedes metastable (overheated) liquid state. Boil the superheated liquid is accompanied by a considerable release of power stored in it. This truth must be taken into account within the evaluation of accidents associated to the depressurization of vessels and apparatuses filled with liquid at higher pressures and temperatures. For this reason actively studied complications beneath the title “steam explosion”. Process analysis intensive phase transition in the superheated liquid to gaseous state needs detailed data about situations of the vapor phase nucleation within the superheated liquid and its additional development.

The experimental procedure. Maximum temperature limited superheating liquids homogeneous nucleation, i.e., The spontaneous formation of nuclei of steam, the dimensions of which exceed important. Pa such embryos liquid capable of very fast boil. The frequency of the spontaneous formation of nuclei is determined by the formula. Frequency versus temperature is expressed particularly strongly. Inside the case of superheated ethyl ester, for example, at a temperature of 143 ° C ravna1 nucleation frequency. Above this temperature only 2 degrees likelihood of germ increases 105 times, and 1010 times three degrees. This shows that, on the 1 hand, very fluid stable with respect to the appearance of spontaneous nucleation, and on the other hand, within a narrow temperature variety which could be characterized by a particular temperature, referred to as temperature homogeneous nucleation, having a probability of virtually equal to a single, it boils .

The sensible realization of effervescence on spontaneous nucleation sites can be accomplished by speedy heating unsteady. For stationary heating, the implementation of such a problem connected with a number of difficulties as a result of presence inside a liquid artificial nucleation sites disposed around the surfaces of dispersed particles contaminating fluid.