RT Journal Article
T1 The role of thermal diffusion, particle clusters, hydrodynamic and magnetic forces on the flow behaviour of magneto-polymer composites.
A1 Suarez-Fernandez, William R
A1 Duran, Juan D G
A1 Lopez-Lopez, Modesto T
K1 Péclet number
K1 magnetic particles
K1 polymer solution
K1 rheology
K1 viscoelasticity
K1 viscosity
AB In this paper, we study the shear-induced flow of magneto-polymer composites, consisting of dispersions of magnetic particles in solutions of polymers, as a competition between the colloidal forces amid particles and their bulk transport induced by the hydrodynamic forces. For this aim, we analyse the role of different experimental parameters. Firstly, by using only solutions of a well-known anionic polymer (sodium alginate), we provoke a moderate hindering of particle movement, but keeping the liquid-like state of the samples. On the contrary, a gel-like behaviour is conferred to the samples when a cationic polymer (chitosan) is additionally added, which further reduces the particle movement. We analyse the effect of an applied magnetic field, which is opposed to particle transport by hydrodynamic forces, by inducing magnetic attraction between the particles. We perform the analysis under both stationary and oscillatory shear. We show that by using dimensionless numbers the differences between samples and experimental conditions are emphasized. In all cases, as expected, the transport of particles driven by bulk hydrodynamic forces dominates at high values of the shear rate. This article is part of the theme issue 'Transport phenomena in complex systems (part 1)'.
PB The Royal Society Publishing
YR 2021
FD 2021-01-21
LK http://hdl.handle.net/10668/18217
UL http://hdl.handle.net/10668/18217
LA en
NO Suarez-Fernandez WR, Duran JDG, Lopez-Lopez MT. The role of thermal diffusion, particle clusters, hydrodynamic and magnetic forces on the flow behaviour of magneto-polymer composites. Philos Trans A Math Phys Eng Sci. 2021 Sep 6;379(2205):20200302.
NO W.R.S.F. acknowledges financial support by the UTE University of Ecuador through paid licenses fortrips and stays from Ecuador to Spain. J.D.G.D. received support from the Ministerio de Economía, Industria yCompetitividad, MINECO and Agencia Estatal de Investigación, AEI, Spain, cofounded by Fondo Europeo deDesarrollo Regional, FEDER, European Union, project no. FIS2017-85954-R. M.T.L.L. received support fromthe Ministerio de Economía, Industria y Competitividad, MINECO, and Agencia Estatal de Investigación,AEI, Spain, cofounded by Fondo Europeo de Desarrollo Regional, FEDER, European Union, project no.FIS2017-85954-R
DS RISalud
RD Apr 8, 2025