The two-dimensional mathematical model in the approximation of a partial local thermodynamic equilibrium of plasma and the technique for numerical computation of the unsteady electric arc characteristics, including the conjugate heat exchange of the electric-arc plasma flow with the treated product (anode) are considered. The results of overall testing of the numerical algorithm point to the correctness of the model and computational technique. The results of the computation of the arc characteristics from the conventional ignition moment until the passage to stationary regime are presented. It is found that a single thermal torus, which scatters fairly quickly in the ambient medium, forms around the arc column.
The dynamics of homogeneously broadened ring lasers supporting two transverse modes is numerically studied. The regimes with periodic and chaotic intensity pulsations have been obtained for lasers having both fast and slow-response relaxation of the population inversion. A phenomenon of metachaos has been found and statistical properties of metastable chaotic states and their dependence on system parameters have been studied.
The application of the Kubo-Greenwood formula and the long mean free path approximation are considered in a calculation of the electrical resistivity and thermoelectric power parameter of liquid noble metals. These calculations take into account up to thirdorder terms with respect to the t matrix. It has been shown that there is a negative third-order contribution to the resistivity. Good agreement with experimental data has been obtained.
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