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نهمین کنگره بین المللی مهندسی عمران
جزئیات رویداد
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  • simulation of the topographically induced separated shallow flow using 3d- rans models

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    • تاریخ ارائه: 1390/11/15
    • تاریخ انتشار در تی پی بین: 1390/11/15
    • تعداد بازدید: 597
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     in this paper we evaluate the performance of reynolds averaged navier stokes (rans) simulations to predict the flow structure developed by the presence of a sidewall obstruction in a uniform open-channel shallow flow. the study of these flow structures is important because they are present in several real world configurations, such as groynes in rivers, where the erosion processes, mass transport, and the influence of the flow hydrodynamics in ecological processes, are still not well understood. results of the numerical simulations have been compared with experimental laboratory measurements based on surface particle image velocimetry (spiv). it was found that the length of the main recirculation zone obtained by two-equation models is shorter than the measured one, while the predicted length by the reynolds stress model (rsm) is in good agreement with the spiv results. all of the performed rans simulations are unable to predict properly the secondary separation zone, which occurs immediately downstream of the side obstacle.

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