Study of Velocity, Flow Depth and Froude Number of HDPE Diagonal Modular Pavement Using FLOW 3D

Abstract

Modular pavement studies traditionally using physical modelling appear to be relatively expensive and risk substantial losses. Because of that, numerical simulation studies are a smart way to either create a new design or build a modular pavement on site before starting. This research examined the correlation of xyz velocity, flow depth and Froude number in a diagonal HDPE modular pavement using FLOW 3D. The simulations use Malaysian actual rainfall data to assess the ability of diagonal pavements to diffuse rainfall. The parameters xyz velocity, flow depth and Froude number were taken to see the absorbed rainfall capacity and the results show that the velocities x and y are greater than the velocities z. The flow depth was maintained at 425.6522 mm during the 600s and 6000s throughout the rainfall events for rainfall intensities of 5 mm/h and 85mm/h. Froude’s number is lower than zero. This FLOW 3D software is suitable as a modular pavement modelling since the velocity, flow depth and Froude number are closely related to the previous study. FLOW 3D can be used as an preliminary method for designing modular pavements.