CONICET | Buscador de Institutos y Recursos Humanos

This paper deals with the changes in wall pressures due to geometric distortions during the steady-state gravity discharge of silos. A contitutive equation developed by the authors is employed, in which the flow of the granular material is modeled as the flow of an incompressible non-Newtonian fluid. The numerical solution of the probelm is achieved by means of a finite element discretization. The walls of the silo are assumed to be rigid, and the distortions have axisymmetric geometry. The results show that the geometric distortions induce changes in the loads on the walls, with a local influence that extends not further than three times the lengthof the imperfections. Finally, it is found that internal geometric deviations produce larger load changes than outer deviations.

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