This article presents a new turbulence closure based on the k-ω SST model for predicting turbulent flows of Herschel–Bulkley fluids, including Bingham and power-law fluids. The has been calibrated with direct numerical simulations (DNS) data fully-developed pipe flow shear-thinning viscoplastic shows good agreement in mean velocity, average viscosity, shear stress budget friction factor. latter...

We analyse through numerical simulations, experiments, and scaling laws the dam-break problem for viscoplastic materials. Numerically, both two three-dimensional (2D 3D) scenarios are considered thanks to a proposed adaptive stabilized finite element framework able compute efficiently free surface flows of highly choose focus on Bingham model. Momentum mass equations solved by using Variational...

In this article, we discuss the numerical solution of Bingham-Bratu-Gelfand (BBG) problem, a non-smooth nonlinear eigenvalue problem associated with total variation integral and an exponential nonlinearity. Using fact that one can view as possible Lagrange multiplier constrained minimization from Calculus Variations, associate BBG initial value (dynamical flow), well suited to time-discretizati...

A phenomenological theory is presented for describing the anisotropic plastic flow of orthotropic polycrystalline aluminum sheet metals under plane stress. The theory uses a stress exponent, a rate-dependent effective flow strength function, and five anisotropic material functions to specify a flowpotential, an associated flow rule of plastic strain rates, a flow rule of plastic spin, and an ev...

The paper describes a local model of concrete on the basis Karagozian & Case (K&C) approach that is successfully used for computed description behavior and reinforced constructions under dynamic loadings. A modified option K&C presented aiming at expansion functional capabilities providing details its computer realization, which scarcely described in publications. Basic ratios are p...

An efficient numerical integration scheme is proposed for the uniaxial loading of two-layer viscoplastic (TLVP) model, which a built-in material model in commercial finite element software Abaqus. The particular version TLVP under investigation governed by linear isotropic plastic hardening rule with time-hardening nonlinear creep law. new can be easily implemented any programming environment l...