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Numerical simulation of flow past a square cylinder

Sohankar, Ahmad ; Norberg, Christoffer LU and Davidson, Lars (1999) 3rd ASME/JSME Joint Fluids Engineering Conference
Abstract
2D and 3D unsteady flow past a rigid prism of a square
cross-section with one side facing the oncoming flow is numerically simulated for Reynolds numbers between 200 to 500. An incompressible code is used employing an implicit fractional step method finite-volume with second-order accuracy in space and time. For 2D flow, it is found that, for Re >300, the time-mean flow patterns are not perfectly symmetric with respect to the oncoming flow. In contrast, such a non-symmetric mean flow pattern is not observed in 3D simulations. There is a marked and characteristic pulsation in the force components in the 3D flow for Re <300. These force pulsations contain characteristic time periods with high and low levels of forces.... (More)
2D and 3D unsteady flow past a rigid prism of a square
cross-section with one side facing the oncoming flow is numerically simulated for Reynolds numbers between 200 to 500. An incompressible code is used employing an implicit fractional step method finite-volume with second-order accuracy in space and time. For 2D flow, it is found that, for Re >300, the time-mean flow patterns are not perfectly symmetric with respect to the oncoming flow. In contrast, such a non-symmetric mean flow pattern is not observed in 3D simulations. There is a marked and characteristic pulsation in the force components in the 3D flow for Re <300. These force pulsations contain characteristic time periods with high and low levels of forces. It is found that when the flow is within a low levels of forces the intensity of threedimensional effects becomes stronger, whereas the opposite is true within a high level of forces. (Less)
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author
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publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
3rd ASME/JSME Joint Fluids Engineering Conference, July 18-23, 1999, San Francisco, USA
pages
6 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
3rd ASME/JSME Joint Fluids Engineering Conference
conference location
San Francisco, United States
conference dates
1999-07-18 - 1999-07-23
ISBN
9780791819616
language
English
LU publication?
yes
additional info
FEDSM99-7172
id
80d535b2-af3e-4e9d-96e2-80f6ae0c2afd
date added to LUP
2023-02-15 17:55:28
date last changed
2023-02-23 15:11:00
@inproceedings{80d535b2-af3e-4e9d-96e2-80f6ae0c2afd,
  abstract     = {{2D and 3D unsteady flow past a rigid prism of a square<br/>cross-section with one side facing the oncoming flow is numerically simulated for Reynolds numbers between 200 to 500. An incompressible code is used employing an implicit fractional step method finite-volume with second-order accuracy in space and time. For 2D flow, it is found that, for <i>Re </i>&gt;300, the time-mean flow patterns are not perfectly symmetric with respect to the oncoming flow. In contrast, such a non-symmetric mean flow pattern is not observed in 3D simulations. There is a marked and characteristic pulsation in the force components in the 3D flow for <i>Re </i>&lt;300. These force pulsations contain characteristic time periods with high and low levels of forces. It is found that when the flow is within a low levels of forces the intensity of threedimensional effects becomes stronger, whereas the opposite is true within a high level of forces.}},
  author       = {{Sohankar, Ahmad and Norberg, Christoffer and Davidson, Lars}},
  booktitle    = {{3rd ASME/JSME Joint Fluids Engineering Conference, July 18-23, 1999, San Francisco, USA}},
  isbn         = {{9780791819616}},
  language     = {{eng}},
  publisher    = {{American Society Of Mechanical Engineers (ASME)}},
  title        = {{Numerical simulation of flow past a square cylinder}},
  url          = {{https://lup.lub.lu.se/search/files/137954956/Sohankar_al_ASME_JSME_1999.pdf}},
  year         = {{1999}},
}