Transport Coefficients of Air - PMMA Mixtures Thermal Plasmas

Kagoné Abdoul Karim^1, , Kohio Nièssan¹, Yaguibou Wêpari Charles¹, Koalaga Zacharie¹ and Zougmoré François¹

¹Materials and Environment Laboratory, Department of Physics, U.F.R / S.E.A, University Joseph KI - ZERBO, 03 BP 7021 Ouagadougou 03, Burkina Faso

Cite this paper:
Kagoné Abdoul Karim, Kohio Nièssan, Yaguibou Wêpari Charles, Koalaga Zacharie and Zougmoré François. Transport Coefficients of Air - PMMA Mixtures Thermal Plasmas. American Journal of Materials Science and Engineering. 2020; 8(1):22-28. doi: 10.12691/ajmse-8-1-4

Abstract

The transport coefficients of Air - PMMA mixtures thermal plasmas is important to estimate the performances of cutting of the electrical arc in this gas by a circuit breaker. In this paper, Air - PMMA mixtures thermal plasmas dynamical viscosity, thermal and electrical conductivities coefficients are calculated in a temperature range from 5000K to 30000K. The calculations are made by supposing thermodynamic equilibrium at pressure of 1 bar to 10 bar. The results of the calculations show the influence of the initial proportion of PMMA but also that of the pressure on the mixture plasma transport coefficients. As the efficiency of the breaking of the electric current by the circuit breaker depends closely on the thermal and electrical characteristics of the extinguishing medium, this extinguishing medium should have a high thermal conductivity and an electrical conductivity varying rapidly with temperature. The plasma of the mixture constituted by 80% of air and 20% of PMMA presents at first sight best characteristics for the breaking of electric current. It has the highest thermal conductivity peak among the plasmas of the mixtures studied.

Keywords:
electrical arc thermal plasma dynamical viscosity thermal conductivity electrical conductivity circuit breaker

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