Singularity of macroscopic variables near boundary for gases with   cut-off inverse-power potential
  In this article, the boundary singularity for stationary solutions of the linearized Boltzmann equation with cut-off inverse power potential is analyzed. In particular, for cut-off hard-potential cases, we establish the asymptotic approximation for the gradient of the moments. Our analysis indicates the logarithmic singularity of the gradient of the moments. 
I-Kun Chen, Chun-Hsiung Hsia
math.AP math-ph math.MP