Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 54 1 2022 03 21 Finite Element Modeling of Fluid-Solid-Piezoelectric for Investigating the Ways of Improving the Performance of the Micro Energy Harvester in the Fluid Flow Finite Element Modeling of Fluid-Solid-Piezoelectric for Investigating the Ways of Improving the Performance of the Micro Energy Harvester in the Fluid Flow 31 54 4557 10.22060/mej.2021.19490.7037 FA Masoomeh Salari دانشکده مهندسی مکانیک Hamed Afrasiab Assistant Professor, Mechanical Engineering Department, Babol Noshirvani University of Technology, Babol, Iran Mohammad Hadi Pashaei Associate Professor, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran Reza Akbari Alashti دانشکده مهندسی مکانیک Journal Article 2021 01 12 <span style="letter-spacing: .05pt;">A coupled fluid-solid-piezoelectric model has been developed by finite element method to study and improve the performance of a micro piezoelectric transducer designed for fluid flow energy harvesting. In this harvester, when the turbulence flow of water passes over a bluff body, the vortex shedding phenomenon occurs and applies a periodical lift force to a piezoelectric beam placed in the downstream region. The resulting oscillations in the piezoelectric beam lead to electrical power generation. Navier-Stokes equations and large-eddy simulation method have been used to describe the fluid turbulence flow, and equations of conservation of linear momentum along with piezoelectric constitutive relations have been employed to obtain solid deformation and electric field intensity. Numerical experiments designed by Taguchi’s method have been used to study the effect of different parameters on the harvester performance. The results have shown that using a triangular or D-shape bluff body, and selecting the minimum possible values for the length to height ratio of the bluff body, the distance between the beam and the bluff body, and eccentricity of the beam relative to the bluff body is beneficial for better performance. Furthermore, the shape of the bluff body has been the most influential parameter on the harvester performance.</span> <span style="letter-spacing: .05pt;">A coupled fluid-solid-piezoelectric model has been developed by finite element method to study and improve the performance of a micro piezoelectric transducer designed for fluid flow energy harvesting. In this harvester, when the turbulence flow of water passes over a bluff body, the vortex shedding phenomenon occurs and applies a periodical lift force to a piezoelectric beam placed in the downstream region. The resulting oscillations in the piezoelectric beam lead to electrical power generation. Navier-Stokes equations and large-eddy simulation method have been used to describe the fluid turbulence flow, and equations of conservation of linear momentum along with piezoelectric constitutive relations have been employed to obtain solid deformation and electric field intensity. Numerical experiments designed by Taguchi’s method have been used to study the effect of different parameters on the harvester performance. The results have shown that using a triangular or D-shape bluff body, and selecting the minimum possible values for the length to height ratio of the bluff body, the distance between the beam and the bluff body, and eccentricity of the beam relative to the bluff body is beneficial for better performance. Furthermore, the shape of the bluff body has been the most influential parameter on the harvester performance.</span> https://mej.aut.ac.ir/article_4557_3596c80a46918e6dde2f3c37290cba47.pdf