煤量甏圆家重点实验宝 3. Outer boundary and iso-velocity line In basic region b <0.y.∞ 2 ∝C1 db dy National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cnNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn 3. Outer boundary and iso-velocity line In basic region dy dv l dt db dy dv v l v v v v dy dv v dt db x t x x t y x y x x y        ' 0, ' ' ( ' ' ) ' 2 2