Article (Scientific journals)
Simultaneous finite element analysis of circuit-integrated piezoelectric energy harvesting from fluid-structure interaction
Ravi, Srivathsan; Zilian, Andreas
2019In Mechanical Systems and Signal Processing, 114, p. 259-274
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Keywords :
Energy harvesting; Fluid-structure interaction; Space-time finite element method; Monolithic coupling
Abstract :
[en] Flow-driven piezoelectric energy harvesting is a strongly coupled multiphysics phenomenon that involves complex three-way interaction between the fluid flow, the electromechanical effect of the piezoelectric material mounted on a deformable substrate structure and the controlling electrical circuit. High fidelity computational solution approaches are essential for the analysis of flow-driven energy harvesters in order to capture the main physical aspects of the coupled problem and to accurately predict the power output of a harvester. While there are some phenomenological and numerical models for flow-driven harvesters reported in the literature, a fully three-dimensional strongly coupled model has not yet been developed, especially in the context of flow-driven energy harvesting. The weighted residuals method is applied to establish a mixed integral equation describing the incompressible Newtonian flow, elastic substrate structure, piezoelectric patch, equipotential electrode and attached electric circuit that form the multiphysics fluid-structure interaction problem. A monolithic numerical solution method is derived that provides consistent and simultaneous solution to all physical fields as well as to fluid mesh deformation. The approximate solution is based on a mixed space-time finite element discretization with static condensation of the auxiliary fields. The discontinuous Galerkin method is utilized for integrating the monolithic model in time. The proposed solution scheme is illustrated in the example of a lid driven cavity with a flexible piezoelectric bottom wall, demonstrating quantification of the amount of electrical energy extractable from fluid flow by means of a piezoelectric harvester device. The results indicate that in order to make reliable predictions on the power output under varying operational states, the realization of strong multiphysics coupling is required for the mathematical model as well as the numerical solution scheme to capture the characteristics of flow-driven energy harvesters.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Ravi, Srivathsan
Zilian, Andreas  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
External co-authors :
no
Language :
English
Title :
Simultaneous finite element analysis of circuit-integrated piezoelectric energy harvesting from fluid-structure interaction
Publication date :
January 2019
Journal title :
Mechanical Systems and Signal Processing
ISSN :
1096-1216
Publisher :
Academic Press, London, United Kingdom
Volume :
114
Pages :
259-274
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
European Projects :
FP7 - 322151 - FSI-HARVEST - Numerical modelling of smart energy harvesting devices driven by flow-induced vibrations
FnR Project :
FNR3996097 - Numerical Modelling Of Smart Energy Harvesting Devices Driven By Flow-induced Vibrations, 2012 (01/02/2013-31/01/2017) - Srivathsan Ravi
Funders :
CE - Commission Européenne [BE]
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since 05 June 2018

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