Simulation of semidilute suspensions by Dissipative Particle Dynamics

Abouzar Moshfegh, Ahmad Jabbarzadeh

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)

Abstract

The stochastic Dissipative Particle Dynamics (DPD) method is calibrated to
discover how relative viscosity of monodisperse colloidal suspension versus volume fraction behaves against different settings assumed for solid mesoparticles. This process together with monitoring the system statistical properties and temperature reveals routes towards capturing the experimental relative viscosity with reasonable computational cost and numerical complexity. Amongst many setting parameters, we only focus on alteration patterns in relative viscosity in semidilute regime obtained by changing solid DPD particles diameter, repulsion coefficient and dissipation rate. Repulsion parameter for solid species plays a major role in adjusting system homogeneity which is crucial to have a stable suspension by avoiding agglomeration. An interesting connection is made between the degree of suspension homogeneity, 3D occupancy patterns and maximum peak in radial distribution function (RDF). The isotropy in diffusion patterns and MSD linear graphs assist to obtain the optimum species size ratio leading to experimental relative viscosity.
Original languageEnglish
Title of host publicationProceedings of the jointly organized 11th World Congress on Computational Mechanics (WCCM XI)
Subtitle of host publication5th European Congress on Computational Mechanics (ECCM V) and 6th European Congress on Computational Fluid Dynamics (EVFD VI)
EditorsEugenio Oñate, Xavier Oliver, Antonio Huerta
Place of PublicationBarcelona, Spain
PublisherInternational Center for Numerical Methods in Engineering
Pages6098-6109
Number of pages12
Volume5
ISBN (Electronic)9788494284472
Publication statusPublished - 1 Jul 2014
Externally publishedYes
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: 20 Jul 201425 Jul 2014

Other

OtherJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period20/07/1425/07/14

Keywords

  • Colloidal suspension
  • DPD
  • Parameterisation
  • Semidilute regime

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