SIMULATION OF LEAKS IN THE VACUUM SYSTEMS

Fractal model of microfractures in the walls of cooled vacuum vessels for experimental thermonuclear reactor was considered. Pressure losses for fluid flow through microchannel network were estimated. Physical mecha-nism of cooling fluid penetration via hypothetic slits and cracks generating tree-structured microchannel net-work is described by the linear non-equilibrium thermodynamic relationships at the given pressure drop on the vessel walls. Computer fluid dynamics approach for homogeneous equilibrium model was applied to calculate the isothermal fluid flow.