Multi-particle collision dynamics (MPCD) is a particle based Navier-Stokes solver and in the last ten years it has been largely used to analyze meso- scopic systems where both hydrodynamics and ther- mal effects have to be taken into account, typical ex- amples being colloidal suspensions and polymer solu- tions. Though the soundness of this approach is well documented, only a few studies present a systematic validation of the method as a Navier-Stokes solver for relatively complex flows (e.g. unsteady, non-uniform). In this study we use MPCD to simulate an unsteady periodic flow (second Stokes’ problem) and a two di- mensional flow (lid-driven cavity). Quantitative com- parisons with analytical and finite difference results show that MPCD is able to correctly reproduce the hy- drodynamics of these systems in a wide range of nu- merical parameter values, allowing the applications of MPCD to the analysis of complex fluids in confined geometries such as in Lab-On-a-Chip microfluidic de- vices. Discrepancies for certain parameter ranges and in specific flow conditions are singled out and discussed.

Flow simulations with multi-particle collision dynamics / E. De Angelis; M. Chinappi; G. Graziani. - In: MECCANICA. - ISSN 0025-6455. - STAMPA. - 47:(2012), pp. 2069-2077. [10.1007/s11012-012-9576-8]

Flow simulations with multi-particle collision dynamics

DE ANGELIS, ELISABETTA;
2012

Abstract

Multi-particle collision dynamics (MPCD) is a particle based Navier-Stokes solver and in the last ten years it has been largely used to analyze meso- scopic systems where both hydrodynamics and ther- mal effects have to be taken into account, typical ex- amples being colloidal suspensions and polymer solu- tions. Though the soundness of this approach is well documented, only a few studies present a systematic validation of the method as a Navier-Stokes solver for relatively complex flows (e.g. unsteady, non-uniform). In this study we use MPCD to simulate an unsteady periodic flow (second Stokes’ problem) and a two di- mensional flow (lid-driven cavity). Quantitative com- parisons with analytical and finite difference results show that MPCD is able to correctly reproduce the hy- drodynamics of these systems in a wide range of nu- merical parameter values, allowing the applications of MPCD to the analysis of complex fluids in confined geometries such as in Lab-On-a-Chip microfluidic de- vices. Discrepancies for certain parameter ranges and in specific flow conditions are singled out and discussed.
2012
Flow simulations with multi-particle collision dynamics / E. De Angelis; M. Chinappi; G. Graziani. - In: MECCANICA. - ISSN 0025-6455. - STAMPA. - 47:(2012), pp. 2069-2077. [10.1007/s11012-012-9576-8]
E. De Angelis; M. Chinappi; G. Graziani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/130257
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