IMPACT ON STRUCTURE DUE TO DEBRIS FLOW USING SMOOTH PARTICLE HYDRODYNAMICS

Abstract

Landslide and debris flow is a prominent disaster in the hilly areas and has been responsible for the destruction of large properties and losses of lives every year. With the advancement in computation and many efficient systems coming into the picture, it has become easier to simulate different phenomena with more accuracy and efficiency in computational cost and time. So many researchers and engineers are working on the modelling of the real phenomena and are able to predict different effects caused by these scenarios. Similar advancement has occurred in the field of the modelling of the flow after the introduction of concepts of SPH. Since the introduction of the SPH in astronomical areas, it has been adopted in so many fields varying from simulation of the ship inside the ocean to forming the molten metal. This concept can be extended in the modelling of the concept of phenomena like landslides and debris flow. With the help of the concept of SPH, it has been possible to model the landslide and debris flow to a very accurate level as the inter-particle distance can be considered very small and with the help of numerical integration and kernel function, it is also become possible to consider the effect of one particle over the other at the different time step. Since the SPH method is based on the Lagrangian method it is possible to trace the trajectory of the particles of the landslide and debris flow which can be helpful in tracing the area which will be effected. After validating the property of flow around the defined boundaries and over the mountainous terrain this concept can be extended to modelling of the debris flow over the real terrain of the mountain. The Lagrangian method gives the leverage to track the property of each particle in the flow which is helpful in finding the velocities and pressure at different locations. Forces can also be calculated on the structure present in the path of the flow in downstream and which will be responsible for the change in the momentum of the particles of the flow. By calculating the forces on the structure it is possible to find the stresses on the structure which will be helpful in designing the structure.