Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
An RBF-reconstructed, polymer stress tensor for stochastic, particle-based simulations of non-Newtonian, multiphase flows
Year:2016
Research Areas
  • Fluid mechanics,
  • Multiphase flows,
  • Equations on partial differentials,
  • Mechanical aeronautics and naval engineering
Information
Abstract
This paper presents a Compactly-Supported, Radial Basis Functions (CSRBFs) method for building the polymer, extra-stress tensor arising in micro-macro simulations of particle-based, viscoelastic, free-surface flows. The extra-stress tensor is reconstructed on the domain and evaluated at the mesh-nodes by CSRBFs using the known values of the tensor at each of the ensembles of dumbbells which carry the molecular information of the non-Newtonian fluid, circumventing the need for ad-hoc methodologies entailing repositioning/creation/destruction of polymer particles. The macroscopic equations and free-surface representation are then discretized using available finite element techniques. The versatility, computational performance and potential of the CSRBF technique is illustrated with simulations of 2d Newtonian bubbles rising in a viscoelastic fluid using the Hooke and FENE kinetic models with highly refined meshes under strong density and viscosity ratios. The results show the ability of the method to accurately build the polymer stress tensor in flows featuring intense viscoelastic effects, while opening the way for adaptive, isotropic or anisotropic, mesh refinement procedures.
International
Si
JCR
Si
Title
Journal of Non-Newtonian Fluid Mechanics
ISBN
0377-0257
Impact factor JCR
2,172
Impact info
Volume
227
10.1016/j.jnnfm.2015.12.00
Journal number
From page
90
To page
99
Month
ENERO
Ranking
2015: IF: 2.172. MECÁNICA: 27/135 (Q1)
Participants
  • Autor: Juan Luis Prieto Ortiz (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Mecánica de fluidos aplicada a la Ingeniería Industrial
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)