A study on temporal accuracy of OpenFOAM

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/474068.do
DOI
10.1016/j.ijnaoe.2016.11.007
Title
A study on temporal accuracy of OpenFOAM
Description
This research was supported by Basic Science Research Program throughthe National Research Foundation of Korea (NRF) funded by the Ministryof Science, ICT & Future Planning (NRF-2016R1C1B1010002).
abstract
Crank-Nicolson scheme in native OpenFOAM source libraries was not able to provide 2nd order temporal accuracy of velocity and pressure since the volume flux of convective nonlinear terms was 1st accurate in time. In the present study the simplest way of getting the volume flux with 2nd order accuracy was proposed by using old fluxes. A possible numerical instability originated from an explicit estimation of volume fluxes could be handled by introducing a weighting factor which was determined by observing the ratio of the finally corrected volume flux to the intermediate volume flux at the previous step. The new calculation of volume fluxes was able to provide temporally accurate velocity and pressure with 2nd order. The improvement of temporal accuracy was validated by performing numerical simulations of 2D Taylor-Green vortex of which an exact solution was known and 2D vortex shedding from a circular cylinder. Copyright (C) 2016 Production and hosting by Elsevier B.V. on behalf of Society of Naval Architects of Korea.
provenance
Made available in Cube on 2018-09-28T10:36:22Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Sang Bong
accessioned
2018-09-28T10:36:22Z
available
2018-09-28T10:36:22Z
issued
2017
citation
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING(9): 4
issn
2092-6782
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/474068.do
Funder
과학기술정보통신부
Funding Program
개인기초연구(미래부)
Project ID
1711053065
Jurisdiction
Rep.of Korea
Project Name
Development of numerical analysis system for resistance and self-propulsion performance using adaptive LTS
rights
openAccess
subject
OpenFOAM
Temporal accuracy
Crank-Nicholson
Convective
Volume flux
type
article


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