Author(s)

R. Van Looveren, P. Willems, M. Sas, C. Bogliotti & J. Berlamont

Abstract

Comparison of the software packages ISIS and Mikell for the simulation of open channel flow R. Van Looveren% P. Willems^ M. SasC. Bogliotti* & J. Berlamonf ^Laboratorium voor Hydraulic a, K.U.Leuven, Belgium. * Hydrodata-IC bvba, Belgium. Abstract In this study two well known commercial software packages for one-dimensional open channel flow are compared to each other: ISIS from HR Wallingford and Mikel 1 from the Danish Hydraulic Institute (DHI). The comparison is confined to the two most important modules, namely the hydrodynamic and the hydrological module. It is proven that the hydrodynamic parts of ISIS and Mikel 1 are very similar. They are both found on the same physical equations (de Saint Venant) and the difference in solution algorithms only leads to local differences in the results (e.g. at hydraulic jumps). ISIS and Mikell take however a different view on how hydraulic structures are to be modelled. The differences between both packages are more pronounced for the

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