The following specific case of the GAMM workshop [6] is studied here:

total length of channel .

length inflow section .

total height .

height inflow section .

viscosity .

density .

maximum flow component of parabolic profile in inflow section .

the flow volume is .

Reynolds .

The result for the minimum x-velocity at distance behind the step is studied. This result checks the correct modeling of the recirculation zone after the step. At the distance we find the minimum velocity is . This happens at above the lower edge. The results of the GAMM workshop were in between and .

tochnog 2001-09-02