American Society of Civil Engineers


Modeling Flow around Bluff Bodies


by Makola M. Abdullah, (Associate Professor, Dept. of Civil and Environmental Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310.), Kenneth K. Walsh, (Research Assistant, Dept. of Civil and Environmental Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310.), Shannon Grady, (Post Doctoral Research Associate, School of Computational Science and Information Technology, The Florida State Univ., Tallahassee, FL 32306-4120.), and G. Dale Wesson, (Assistant Professor, Dept. of Chemical Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310.)

Journal of Computing in Civil Engineering, Vol. 19, No. 1, January 2005, pp. 104-107, (doi:  http://dx.doi.org/10.1061/(ASCE)0887-3801(2005)19:1(104))

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Document type: Technical Note
Abstract: The interaction of wind with elastic structures is complex. It is impossible to describe both wind and structural motion without considering the interaction therein. The purpose of this technical note is to present a method for simulating wind-structure interaction using commercial software. The use of commercial software is significant because it enables the utilization of this method by civil engineers of various technical backgrounds. The proposed method is a time-dependent, incremental load.response technique. It employs a partitioned procedure that uses Fluent’s computational fluid dynamics software for finding the wind-induced forces on a structure, and Matlab for determining the corresponding structural response. The method is validated by analyzing the two-dimensional vortex-induced oscillations of an elastically mounted circular cylinder. The cylinder is modeled as an elastically mounted rigid body with motion limited to the perpendicular direction with respect to the mean flow. The maximum nondimensional displacement of the cylinder is calculated and found to fall within the range of previously published numerical and experimental values


ASCE Subject Headings:
Computer software
Cylinders
Fluid-structure interactions
Laminar flow
Vortices