Zero dielectric constant limit to the non-isentropic compressible   Euler-Maxwell system
  In this paper we investigate the zero dielectric constant limit to the non-isentropic compressible Euler-Maxwell system. We justify this singular limit rigorously in the framework of smooth solutions and obtain the non-isentropic compressible magnetohydrodynamic equations as the dielectric constant tends to zero. 
Song Jiang, Fucai Li
math.AP