Numerical Simulation of Flow Pattern Using SSIIM Software around a Structure

Subject Areas : watere sciences

mehrnaz Roozbahani ¹ , kouros nekoufar ² , armin halajian ³

1 - aerospace research institute
2 - University faculty member, Islamic Azad University, Chalous Branch, Iran
3 - MSc Student, Islamic Azad University, Chalous Branch, Iran

Received: 2018-02-12 Accepted : 2021-11-08 Published : 2021-08-23

Keywords: Scour, Bridge pier, Software SSIIM, Flow Pattern,

Abstract :

Studies on hydraulic structures, especially around the bridge bases, show that one of the main causes of bridge destruction is the local turbulence of the flow. In order to be economical and reliable design, you have to get the maximum depth of deflection around the bases. Estimating the maximum depth of scouring with the purpose of determining the depth required for bridge bridges is necessary, as otherwise it may lead to bridge collapse. SSIIM software is used in this study, which takes into account the flow and sediment equations in a three-dimensional fashion. In this software, the flow field is obtained from the Navier-Stokes equations and the K-ε turbulence model, and then, using the nondetective solution of the deposit field and the continuity equation, the ground level changes are calculated around the bridge's base. Comparison of the results shows that the scour depth increases with increasing height, and if the angular gradient exceeds a limit, then the destruction of the wall of the scouring cavity is accompanied.