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Study on direct measurement method of vorticity from particle images

RUAN Xiaodong, FU Xin, YANG Huayong

Frontiers in Energy 2007, Volume 1, Issue 4, Pages 408-412 doi: 10.1007/s11708-007-0059-1

Abstract: To overcome the shortcomings of conventional methods for vorticity measurement, a new direct measurementof vorticity (DMV) method extracting vorticity from particle images was proposed.

Keywords： conventional vorticity measurement particle DMV theory

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Simulation of cross-flow-induced vibration of tube bundle by surface vorticity method

WANG Fenghao, JIANG Gedong, Lin John Zhang

Frontiers in Energy 2008, Volume 2, Issue 3, Pages 243-248 doi: 10.1007/s11708-008-0049-7

Abstract: A fluid-structure interaction model based on Surface Vorticity Method (SVM) was used to study flow-inducedThe results on fluid forces, tube responses and vorticity maps were presented.The vorticity maps of the four rotated-square tubes changed dramatically when the rigid tubes were replacedFrom the vorticity maps and vibration responses of the staggered tube bundle of different structural

Keywords： dominant sub-critical Reynolds staggered Vorticity three-row

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Kinetic energy based model assessment and sensitivity analysis of vortex induced vibration of segmental bridge decks

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 480-501 doi: 10.1007/s11709-017-0435-5

Abstract: In this paper, semi 3D models for segmental Bridge decks are created in ABAQUS CFD program with the support of MATLAB codes to simulate and analyze vortex shedding generated due to wind excitation through considering the stationary position of the deck. Three parameters (wind speed, deck streamlined length and dynamic viscosity of the air) are dedicated to study their effects on the kinetic energy of the system in addition to the shapes and patterns of the vortices. Two benchmarks from the literature Von Karman and Dyrbye and Hansen are considered to validate the vortex shedding aspects for the CFD models. Good agreement between the results of the benchmarks and the semi 3D models has been detected. Latin hypercube experimental method is dedicated to generate the surrogate models for the kinetic energy of the system and the lift forces. Variance based sensitivity analysis is utilized to calculate the main sensitivity indices and the interaction orders for all the three parameters. The kinetic energy approach performed very well in revealing the rational effects and the roles of each parameter in the generation of vortex shedding and predicting vortex induced vibration of the deck.

Keywords： vortex induced vibration reynolds number kinetic energy vorticity latin hypercube sampling