Remarks on Blowup of Solutions for Compressible Navier–Stokes Equations with Revised Maxwell’s Law

In this note, we study the blowup of classical solutions to the three-dimensional compressible Navier–Stokes equations with revised Maxwell’s law. First, we improve the previous blowup result with initial density away from vacuum by removing three restrictions. Next, we present a blowup result for the classical solutions with decay at far fields when the shear relaxation time is zero by introducing a new averaged quantity.