Exploiting timescale separation in micro and nano flows

Duncan A.  Lockerby; Carlos A. Duque-Daza; Matthew K. Borg; Jason M. Reese

Exploiting timescale separation in micro and nano flows

Duncan A. Lockerby, Carlos A. Duque-Daza, Matthew K. Borg, Jason M. Reese

Mechanical And Aerospace Engineering

Research output: Contribution to conference › Paper › peer-review

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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.

Original language	English
Number of pages	7
Publication status	Published - 22 Aug 2011
Event	3rd Micro and Nano Flows Conference, MNF11 - Thessaloniki, Greece Duration: 22 Aug 2011 → 24 Aug 2011

Conference

Conference	3rd Micro and Nano Flows Conference, MNF11
Country/Territory	Greece
City	Thessaloniki
Period	22/08/11 → 24/08/11

Keywords

Heterogenous Multiscale Method (HMM)
seamless HMM
rarefied oscillatory Poiseuille flow

Access to Document

Reese_JM_Pure_Exploiting_timescale_separation_in_micro_and_nano_flows_Aug_2011Accepted author manuscript, 999 KB

Non-Equilibrium Fluid Dynamics for Micro/Nano Engineering Systems | Docherty, Stephanie
Docherty, S. (Research Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/11 → 7/10/15
Project: Research - Internally Allocated

ARCHIE-WeSt (UOSHPC)
Martin, R. (Manager)
University Of Strathclyde
Facility/equipment: Facility

Cite this

@conference{0a198a633a8246cb986b7bd13f42b3fe,

title = "Exploiting timescale separation in micro and nano flows",

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. ",

keywords = "Heterogenous Multiscale Method (HMM), seamless HMM, rarefied oscillatory Poiseuille flow",

author = "Lockerby, \{Duncan A.\} and Duque-Daza, \{Carlos A.\} and Borg, \{Matthew K.\} and Reese, \{Jason M.\}",

year = "2011",

month = aug,

day = "22",

language = "English",

note = "3rd Micro and Nano Flows Conference, MNF11 ; Conference date: 22-08-2011 Through 24-08-2011",

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TY - CONF

T1 - Exploiting timescale separation in micro and nano flows

AU - Lockerby, Duncan A.

AU - Duque-Daza, Carlos A.

AU - Borg, Matthew K.

AU - Reese, Jason M.

PY - 2011/8/22

Y1 - 2011/8/22

N2 - 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.

AB - 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.

KW - Heterogenous Multiscale Method (HMM)

KW - seamless HMM

KW - rarefied oscillatory Poiseuille flow

M3 - Paper

T2 - 3rd Micro and Nano Flows Conference, MNF11

Y2 - 22 August 2011 through 24 August 2011

ER -

Exploiting timescale separation in micro and nano flows

Abstract

Conference

Keywords

Access to Document

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Projects

Non-Equilibrium Fluid Dynamics for Micro/Nano Engineering Systems | Docherty, Stephanie

Equipment

ARCHIE-WeSt (UOSHPC)

Cite this