EXISTENCE OF STRONG SOLUTION FOR THE CAUCHY PROBLEM OF FULLY COMPRESSIBLE NAVIER-STOKES EQUATIONS IN TWO DIMENSIONS

We study the Cauchy problem for the equations describing a viscous compressible and heat-conductive fluid in two dimensions. By imposing a weight function to initial density to deal with Sobolev embedding in critical space, and constructing an ad-hoc truncation to control the quadratic nonlinearity appeared in energy equation, we establish the local in time existence of unique strong solution with large initial data. The vacuum state at infinity or the compactly supported density is permitted. Moreover, we provide a different approach and slightly improve the weighted LP estimates in [19, Theorem B.1].