Application of the Fokker-Planck Kolmogorov equation to determining the mean value of nucleons generated by the direct ejection process

The statistical description of the process of direct nucleon ejection is the subject of this paper. This description is based on the generalized Fokker-Planck-Kolmogorov equation. The basic proposal is this: deterministic equations and their solutions have the mean values of the stochastic model of the ablation problem. The problem of deformation of the phase transition front is considered. The study is carried out by using the introduced stability position for the dispersion of solutions for mean values. The result of the study is the conclusion that the influence of the Markov diffusion coefficient leads to distortion of the original shape of the boundary phase transition front. The effect of the initial aspiration to resist changing the shape of the phase transition front was found.

CFD ANALYSIS OF THE HEAT TRANSFER OF SUPERCRITICAL WATER UNDER CONDITIONS OF MIXED CONVECTION

The results of computer modeling of heat exchange supercritical water, associated with the influence of gravity, are presented. CFD prediction data on heat transfer coefficients and temperatures of the inside surface of the tube wall, obtained with and without buoyancy, are presented. An interpretation of these predictions, which is associated with the turbulent transfer extinction near the tube wall in the case of buoyancy forces, is given. The analysis of the influence of buoyancy forces on the configuration of the radial temperature profiles of supercritical water was performed. The data on the regularities of motion of the pseudo-phase transition front in the presence and absence of accounting for buoyancy forces have been obtained.