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- Publications
- Influence
An adaptive finite element method for viscoplastic fluid flows in pipes
- P. Saramito, N. Roquet
- Mathematics
- 20 July 2001
The numerical modelling of the fully developed Poiseuille flow of a yield stress fluid in a square section is presented. The dead regions in outer corners and the plug region in the center are… Expand
An adaptive finite element method for Bingham fluid flows around a cylinder
- N. Roquet, P. Saramito
- Mathematics
- 1 August 2003
The numerical modeling of the steady flow of a yield stress fluid around a cylinder is presented. Three categories of yielded regions are exhibited. The asymptotic behavior when the cylinder gets… Expand
An adaptive finite element method for viscoplastic flows in a square pipe with stick-slip at the wall
- N. Roquet, P. Saramito
- Geology
- 1 December 2008
This paper presents the numerical solution of non-linear yield stress phenomena by using a new mixed anisotropic auto-adaptive finite element method. The Poiseuille flow of a Bingham fluid with slip… Expand
Concrete Mixing Kinetics by Means of Power Measurement
- B. Cazacliu, N. Roquet
- Materials Science
- 1 March 2009
This paper introduces a new model for concrete mixing kinetics. The model defines five successive stages through which the mixture characteristics change. It is also shown that the time-variation of… Expand
Résolution numérique d'écoulements à effets de seuil par éléments finis mixtes et adaptation de maillage
- N. Roquet
- Physics
- 2000
Ce travail decrit une methode numerique pour un probleme d'inequations variationnelles, avec une analyse de convergence suivie d'applications concretes. Les inequations sont issues de lois… Expand
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Stick-slip transition capturing by using an adaptive finite element method
- N. Roquet, P. Saramito
- Mathematics
- 1 March 2004
The numerical modeling of the fully developed Poiseuille flow of a Newtonian fluid in a square section with slip yield boundary condition at the wall is presented. The stick regions in outer corners… Expand
Discrete simulation of dense flows of polyhedral grains down a rough inclined plane.
- E. Az'ema, Y. Descantes, N. Roquet, J. Roux, François Chevoir
- Materials Science, Medicine
- Physical review. E, Statistical, nonlinear, and…
- 20 July 2012
The influence of grain angularity on the properties of dense flows down a rough inclined plane are investigated. Three-dimensional numerical simulations using the nonsmooth contact dynamics method… Expand
Analysis of a Regularized Bingham Model with Pressure-Dependent Yield Stress
- Nazek El Khouja, N. Roquet, B. Cazacliu
- Mathematics
- 7 October 2015
The goal of this article is to provide some essential results for the solution of a regularized viscoplastic frictional flow model adapted from the extensive mathematical analysis of the Bingham… Expand
Estimations d'erreur pour un fluide viscoplastique par éléments finis Pk et maillages adaptés
- N. Roquet, R. Michel, P. Saramito
- Mathematics
- 1 October 2000
Resume Nous montrons une estimation a priori de l'erreur en O (h k | ln h| ) , en utilisant des maillages adaptes et des methodes d'elements finis de type Pk , lors de l'approximation de l'ecoulement… Expand
Simulation numérique d'un écoulement viscoplastique frictionnel autour d'un cylindre circulaire
- Nazek El Khouja, N. Roquet, B. Cazacliu
- Engineering
- 20 December 2013
The aim of this paper is to study the flow of a frictional viscoplastic material around a circular cylinder. A Frictional Viscoplastic Law FVL(p0) for this purpose is described and discussed. It is a… Expand