  The classic Noh verification test problem is extended beyond the traditional
ideal gas and applied to shock compression of condensed matter. Using the
stiff-gas equation of state (EOS), which admits an exact analytical solution
for the planar Noh problem, we examine the shock compression of Al, Fe, Cu, and
W. Analytical EOS predictions for the jump in density and the location of the
shock are compared to numerical results obtained using the same EOS within Los
Alamos compressible-flow codes Flag and xRage. Excellent agreement between the
numerical and exact results is observed. Both codes exhibit first-order spatial
convergence with increasing mesh resolution.
