三角形断面の溝が希薄Couette流れに与える影響

抄録

The rarefied Couette flow between two walls with triangular surface grooves is simulated by Direct Simulation Monte Carlo method. The groove is set on the stationary wall only, whose depth is h and angle is α. The average flow speed is reduced by the groove, whose effect becomes large on large α and large Knudsen number Kn. The depth of groove has relatively small effect on the average flow. The area with strong disturbed flow made by grooves becomes largest at α=10 degree. When the Kn becomes 0.1, the disturbance becomes smaller. And at large Kn and large distance between walls, H, the area with disturbed flow becomes almost same.