## 1 Introduction
The presence of the bluff splitter body is able to improve the flow shedding effect, generating a larger vortex formation area, while the cantilever PVEH plate acts similarly to a vibrating elastic plate when interacting with the vortex thus generating power output without the need to consider the PVDF patch location. Mentioned above, the coupled bluff splitter body and PVEH plate energy harvester model requires a piezoelectric plate that is thin and elastic and also has the ability to produce larger voltage output compared to a PVDF plate. A piezoelectric bimorph plate proposed by [PERSON] et al. is composed of a brass plate sandwiched between two lead zirconate titanate (PZT) plates. This material is capable of two-way conversion between mechanical and electrical energy with either series or parallel connections [35]. It is realized that a parallel piezoelectric bimorph coupling will generate twice the higher electromechanical conversion efficiency compared with a series coupling [36]. Large voltage is able to be generated through vibrational displacement of the plate especially during resonant frequency where electrical impedance dropped to a local minimum and voltage output is maximized [37; 38]. Currently, the piezoelectric bimorph plate used in this research has a relatively higher natural frequency compared to some of the previous research listed above. In order to generate a steady, continuous and high frequency VIV, a higher consistent fluid flow velocity value is needed. [PERSON] et al. introduced the idea of installing a vertical axis wind turbine on top of an exhaust air cooling tower to harness the constant high-speed exhaust air flow for energy harvesting [39; 40; 41]. This concept of utilizing forced flow is also suitable for the ITEVIV energy harvesters in this research, as a high-speed constant fluid flow criteria, needed to ensure continuous energy harvesting, in advance maximizing the total energy generated. A conventional upward draft exhaust air cooling tower flow rate can achieve an air discharge velocity of 10 m/s [42]. Due to the lack of research on the ITEVIV energy harvesting method and the potential development this method possesses as the future source of renewable energy, this research is thus aimed at proposing a solution for ITEVIV energy harvester enhancement for the shortcomings listed above. A fixed T-shaped coupled bluff splitter body and PVEH plate model is introduced because the introduction of a bluff splitter body is aimed at enhancing the vortex generated from flow shedding. The wide bluff splitter body is able to shed or separate flow, while providing a sufficient area for clear vortex formation around the PVEH plate model. Larger pressure difference is then induced during vortex occurrence and results in a stable vortex frequency acting by the side of the plate. The structural model is then improved by optimizing wind speeds in order to generate maximum VIV, utilizing the resonance effect. The structural model used a thin PVEH plate instead of a PVDF patch to ensure maximum power output generation without the need to determine the location at the host plate that generates the highest strain for maximum voltage production. As the natural frequency of the PVEH plate is relatively higher, the IIEVIV energy harvester is proposed to be more suitably installed at a location with constant high velocity flow--i.e., exhaust air fan or fluid piping--because this encourages consistent VIV generation of the PVEH plate while maximizing the power output. This research is conducted using a FSI simulation to understand the vibrational performance and resulting voltage output of the proposed model when undergoing different high velocity wind speeds, especially when achieving resonance. In the next section, the theories and calculation methods of vortex induced vibration are mentioned. The third section lists the materials and methodologies applied to conduct the research followed by the results and discussions obtained in the subsequent section.