By means of numerical simulations, we show that assemblies of frictionless rigid pentagons in slow shear flow possess an internal friction coefficient (equal to 0.183±0.008 with our choice of moderately polydisperse grains) but no macroscopic dilatancy. In other words, despite side-side contacts tending to hinder relative particle rotations, the solid fraction under quasistatic shear coincides ...

regarding the role and importance of subsurface drainage in water table control, many studies have been made throughout the world to find out new techniques and more economical solutions, especially as related to different pipe envelope material and their installations. this research was conducted to investigate the use of rice husk, as drain envelope material, in drainage installations. in add...

Fluid-fault interactions result in many two-way coupled processes across a range of length scales, from the micron scale shear zone to kilometer slip patch. The separation and complex coupling render fluid-fault challenging simulate, yet they are key for our understanding experimental data induced seismicity. Here we present spectral boundary-integral solutions in-plane interface sliding openin...