ON A BOUNDARY-VALUE PROBLEM FOR THE PLANE BROADWELL MODEL - EXACT-SOLUTIONS AND NUMERICAL-SIMULATION

The initial boundary value problem for the Broadwell model equations i n a half infinite channel with an infinitely small hole is considered. It is proved that this boundary value problem has no unique solution for sufficiently large concentration of the gas. There are at least tw o different solutions, we have constructed them in explicit form. The existence of stationary solutions for the corresponding initial bounda ry value problem is then numerically investigated. The results indicat e a unique asymptotic behavior of the model, very close to one of the two predicted stationary solutions.