Beta
ManageSearchChatDiscover
23881

DOWNSTREAM INSTABILITY OF VISCOELASTIC FLOW PAST A CYLINDER

Article

Last updated: 24 Dec 2024

OverviewSimilar Items

Subjects

-

Tags

-

Abstract

This work aims at simulating two-dimensional viscoelastic incompressible fluid flow past a non-confined cylinder. The finite volume method is used to descritize the governing equations written in the generalized orthogonal coordinate system. For the viscoelastic constitutive equation, two models are studied; the Oldryod-B model and the Phan-Thien-Tanner model PTT model. The quadratic scheme QUICK is employed to evaluate the convection terms. The terms of diffusion, advection and
acceleration are treated explicitly. The Elastic Viscous Split Stresses (EVSS) scheme is used to decompose the stress tensor to enhance the stability of computations. The obtained results indicate that, for Newtonian flow, the onset of von Karman street occurs at Reynolds number Re ≥ 47. Upon the onset of vortex shedding the downstream instability zone is elongated and the shedding frequency is reduced. The PTT model proves more stability of computations and reached higher Deborah numbers.

DOI

10.21608/asat.2007.23881

Keywords

Viscoelastic Fluids, Generalized Orthogonal Coordinates, Flow past a Cylinder

Authors

First Name

H.

Last Name

KAMAL

MiddleName

-

Affiliation

Egyptian Armed Forces+, Laboratoire de Mécanique de Lille, UMR-CNRS 8107 Université des Sciences et Technologies de Lille, Polytech’Lille - Cité Scientifique, 59655 Villeneuve d’Ascq Cedex, France

Email

-

City

-

Orcid

-

First Name

H.

Last Name

NAJI

MiddleName

-

Affiliation

Laboratoire de Mécanique de Lille, UMR-CNRS 8107 Université des Sciences et Technologies de Lille, Polytech'Lille - Cité Scientifique, 59655 Villeneuve d'Ascq Cedex, France.

Email

-

City

-

Orcid

-

First Name

L.

Last Name

THAIS

MiddleName

-

Affiliation

Laboratoire de Mécanique de Lille, UMR-CNRS 8107 Université des Sciences et Technologies de Lille, Polytech'Lille - Cité Scientifique, 59655 Villeneuve d'Ascq Cedex, France.

Email

-

City

-

Orcid

-

First Name

G.

Last Name

MOMPEAN

MiddleName

-

Affiliation

Laboratoire de Mécanique de Lille, UMR-CNRS 8107 Université des Sciences et Technologies de Lille, Polytech'Lille - Cité Scientifique, 59655 Villeneuve d'Ascq Cedex, France..

Email

-

City

-

Orcid

-

Volume

12

Article Issue

ASAT Conference, 29-31 May 2007

Related Issue

4431

Issue Date

2007-05-01

Receive Date

2019-01-08

Publish Date

2007-05-01

Page Start

1

Page End

9

Print ISSN

2090-0678

Online ISSN

2636-364X

Article File

ASAT_Volume 12_Issue ASAT Conference, 29-31 May 2007_Pages 1-9.pdf

PDF . 186.2kB

Link

https://asat.journals.ekb.eg/article_23881.html

Detail API

https://asat.journals.ekb.eg/service?article_code=23881

Order

16

Type

Original Article

Type Code

737

Publication Type

Journal

Publication Title

International Conference on Aerospace Sciences and Aviation Technology

Publication Link

https://asat.journals.ekb.eg/

MainTitle

DOWNSTREAM INSTABILITY OF VISCOELASTIC FLOW PAST A CYLINDER

Details

Type

Article

Created At

22 Jan 2023