Europhys. Lett.
Volume 73, Number 4, February 2006
Page(s) 533 - 539
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 13 January 2006
Europhys. Lett., 73 (4), pp. 533-539 (2006)
DOI: 10.1209/epl/i2005-10438-x

Emergence of rheological properties in lattice Boltzmann simulations of gyroid mesophases

G. Giupponi1, J. Harting2 and P. V. Coveney1

1  Centre for Computational Science, Department of Chemistry University College London - 20 Gordon Street, WC1H 0AJ, London, UK
2  Institute for Computational Physics, University of Stuttgart Pfaffenwaldring 27, 70569 Stuttgart, Germany

received 28 June 2005; accepted in final form 21 December 2005
published online 13 January 2006

We use a lattice Boltzmann (LB) kinetic scheme for modelling amphiphilic fluids that correctly predicts rheological effects in flow. No macroscopic parameters are included in the model. Instead, three-dimensional hydrodynamic and rheological effects are emergent from the underlying particulate conservation laws and interactions. We report evidence of shear thinning and viscoelastic flow for a self-assembled gyroid mesophase. This purely kinetic approach is of general importance for the modelling and simulation of complex fluid flows in situations when rheological properties cannot be predicted a priori.

47.11.+j - Computational methods in fluid dynamics.
82.70.Uv - Surfactants, micellar solutions, vesicles, lamellae, amphiphilic systems (hydrophilic and hydrophobic interactions).
83.60.-a - Rheology: Material behaviour.

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