A versatile conservative three-dimensional Cartesian cut-cell method for simulation of incompressible viscous flows over complex geometries is presented in this paper. The present based on the finite volume a non-uniform staggered grid together with consistent mass and momentum flux computation. Contrary to commonly methods, an implicit time integration scheme employed method, which avoids nume...

Abstract A new discretization approach is presented for the simulation of flow in complex poro-fractured media described by means Discrete Fracture and Matrix Model. The method based on numerical optimization a properly defined cost-functional allows to solve problem without any constraint mesh generation, thus overcoming one main complexities related efficient effective simulations realistic D...

This paper focuses on the semiclassical behavior of spinfoam quantum gravity in four dimensions. There has been long-standing confusion, known as flatness problem, about whether curved geometry exists regime amplitude. The confusion is resolved by present work. By numerical computations, we explicitly find Regge geometries that contribute dominantly to large-$j$ Lorentzian Engle-Pereira-Rovelli...