Home – Home – Jornals – Thermophysics and Aeromechanics 2002 number 4

The paper presents results of numerical simulation for screening effect of charged dust particles that are generated above the electrode due to its sputtering by plasma flow. Two problems are solved sequentially: calculation of plasma parameters for a diverter of fusion reactor and simulation of nucleation of liquid droplets due to condensation of metal vapour (electrode material). A one-dimensional  hydrodynamic computer code TDF was used for calculation of plasma parameters: temperature, density, material and heat flux along the plasma flow (directed along the magnetic field lines). This simulation also takes into account electric thermal conductivity, ionization, recharging, atom excitation, and plasma recombination. Existence of charged metal droplets and neutral component of plasma due to plasma recombination on the surface was included into this model.  Plasma parameters calculated by TDF are the initial data for kinetic code TAG, which is a stochastic model of non-equilibrium fluctuation stage of metal vapour condensation – during this stage the distribution function of nuclei on their size is formed.