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Exploiting timescale separation in micro and nano flows

Lockerby, Duncan A. and Duque Daza, C.A. and Borg, Matthew Karl and Reese, Jason (2011) Exploiting timescale separation in micro and nano flows. In: CECAM Workshop on Multiscale Modelling of Simple and Complex Liquid Flow Using Particle-Continuum Hybrids, 2011-10-05 - 2011-10-07, Zaragoza.

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    Abstract

    In this paper we describe how timescale separation in micro/nano flows can be exploited for computational acceleration. A modified version of the seamless heterogenous multiscale method (SHMM) is proposed: a multi-step SHMM. This maintains the main advantages of SHMM (e.g., re-initialisation of micro data is not required; temporal gearing (computational speed-up) is easily controlled; and it is applicable to full and intermediate degrees of timescale separation) while improving on accuracy and greatly reducing the number of macroscopic computations and micro/macro coupling instances required. The improved accuracy of the multi-step SHMM is demonstrated for two canonical one-dimensional transient flows (oscillatory Poiseuille and oscillatory Couette flow) and for rarefied-gas oscillatory Poiseuille flow.

    Item type: Conference or Workshop Item (Paper)
    ID code: 36519
    Notes: Same paper presented at two different events
    Keywords: Heterogenous Multiscale Method (HMM), seamless HMM, rarefied oscillatory Poiseuille flow, Mechanical engineering and machinery, Solid state physics. Nanoscience
    Subjects: Technology > Mechanical engineering and machinery
    Science > Physics > Solid state physics. Nanoscience
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Technology and Innovation Centre > Advanced Engineering and Manufacturing
    Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 20 Dec 2011 13:59
    Last modified: 13 Jun 2013 23:21
    URI: http://strathprints.strath.ac.uk/id/eprint/36519

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