Abstract
In this paper, FDS method is applied to numerical computation of open channel flow. First, three methods of “Roe's conservative linearization”, which satisfy the Rankine-Hugoniot relationship, are compared and the best applicable one is selected. Second, removal methods of non-physical solution (expansion shock in ideal gas) that arise near control section in open channel flow are studied and the most effective one is clarified. Third, the calculation techniques are made clear. Furthermore, numerical computation for dam break flow and open channel flow with transition are examined, and FDS method is verified to be effective for numerical computation of open channel flows.
