CSIR Central

Dynamic behavior of flow around rows of square cylinders kept in staggered arrangement

IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur


Field	Value

Title	Dynamic behavior of flow around rows of square cylinders kept in staggered arrangement

Creator	Chatterjee, Dipankar Biswas, Gautam

Subject	Computational fluid dynamics

Description	A two-dimensional numerical study is carried out to understand the vortex dynamics behind two rows of square cylinders arranged in a staggered fashion in an unbounded medium and at low Reynolds number (Re=100). A uniform cross flow of an incompressible fluid is considered. The transverse spacing between the cylinders is varied (S/d=1, 2, 3 and 5; with S and d are the transverse spacing and cylinder size) while the streamwise gap is fixed at L/d=1 (L being the streamwise gap). Computations are performed by a finite volume based CFD solver using PISO algorithm. An unsteady two-dimensional laminar model is used for all the computations. Effect of transverse spacing on flow characteristics and global fluid dynamic parameters are discussed. Furthermore, the establishment of the low-dimensional chaotic nature of the flow is predicted for relatively small transverse spacing of the cylinders. The transition to chaos is manifested through a quasi-periodic route. The quasi-periodic route to chaos is established through different characterization tools, such as the spectra, autocorrelation function, time-delay reconstruction and the Poincare section. The chaotic behavior of the flow system is quantified through the calculation of the Lyapunov exponent and fractal dimension.

Publisher	Elsevier

Date	2015-01

Type	Article PeerReviewed

Identifier	Chatterjee, Dipankar and Biswas, Gautam (2015) Dynamic behavior of flow around rows of square cylinders kept in staggered arrangement. Journal of Wind Engineering and Industrial Aerodynamics, 136. pp. 1-11.

Relation	http://cmeri.csircentral.net/213/