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Dynamics of multiphase systems with complex microstructure. II. Particle-stabilized interfaces.

Abstract

In this paper we use the GENERIC (general equation for nonequilibrium reversible-irreversible coupling) nonequilibrium thermodynamics framework to derive constitutive equations for the surface extra stress tensor of an interface stabilized by a two-dimensional suspension of anisotropic colloidal particles. The dependence of the surface stress tensor on the microstructure of the interface is incorporated through a dependence on a single tensorial structural variable, characterizing the average orientation of the particles. The constitutive equation for the stress tensor is combined with a time-evolution equation describing the changes in the orientation tensor as a result of the applied deformation field. We examine the predictions of the model in in-plane steady shear flow, in-plane oscillatory shear flow, and oscillatory dilatational flow. The model is able to predict the experimentally observed shear thinning behavior in surface shear flow, and also the experimentally observed emergence of even harmonics in the frequency spectrum of the surface stress in oscillatory dilatational flow. Our results show that the highly nonlinear stress-deformation behavior of interfaces with a complex microstructure can be modeled well using simple structural models like the one presented here.

Authors+Show Affiliations

Food Physics Group, Wageningen University, Bomenweg 2, 6703 HD Wageningen, The Netherlands and ETH Zurich, Department of Materials, Polymer Physics, Wolfgang-Pauli-Strasse 10, 8093 Zurich, Switzerland.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24032817

Citation

Sagis, Leonard M C.. "Dynamics of Multiphase Systems With Complex Microstructure. II. Particle-stabilized Interfaces." Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, vol. 88, no. 2, 2013, p. 022150.
Sagis LM. Dynamics of multiphase systems with complex microstructure. II. Particle-stabilized interfaces. Phys Rev E Stat Nonlin Soft Matter Phys. 2013;88(2):022150.
Sagis, L. M. (2013). Dynamics of multiphase systems with complex microstructure. II. Particle-stabilized interfaces. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, 88(2), p. 022150.
Sagis LM. Dynamics of Multiphase Systems With Complex Microstructure. II. Particle-stabilized Interfaces. Phys Rev E Stat Nonlin Soft Matter Phys. 2013;88(2):022150. PubMed PMID: 24032817.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dynamics of multiphase systems with complex microstructure. II. Particle-stabilized interfaces. A1 - Sagis,Leonard M C, Y1 - 2013/08/29/ PY - 2013/03/26/received PY - 2013/9/17/entrez PY - 2013/9/17/pubmed PY - 2013/9/17/medline SP - 022150 EP - 022150 JF - Physical review. E, Statistical, nonlinear, and soft matter physics JO - Phys Rev E Stat Nonlin Soft Matter Phys VL - 88 IS - 2 N2 - In this paper we use the GENERIC (general equation for nonequilibrium reversible-irreversible coupling) nonequilibrium thermodynamics framework to derive constitutive equations for the surface extra stress tensor of an interface stabilized by a two-dimensional suspension of anisotropic colloidal particles. The dependence of the surface stress tensor on the microstructure of the interface is incorporated through a dependence on a single tensorial structural variable, characterizing the average orientation of the particles. The constitutive equation for the stress tensor is combined with a time-evolution equation describing the changes in the orientation tensor as a result of the applied deformation field. We examine the predictions of the model in in-plane steady shear flow, in-plane oscillatory shear flow, and oscillatory dilatational flow. The model is able to predict the experimentally observed shear thinning behavior in surface shear flow, and also the experimentally observed emergence of even harmonics in the frequency spectrum of the surface stress in oscillatory dilatational flow. Our results show that the highly nonlinear stress-deformation behavior of interfaces with a complex microstructure can be modeled well using simple structural models like the one presented here. SN - 1550-2376 UR - https://www.unboundmedicine.com/medline/citation/24032817/Dynamics_of_multiphase_systems_with_complex_microstructure__II__Particle_stabilized_interfaces_ DB - PRIME DP - Unbound Medicine ER -
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