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Multiphysics vibration FE model of piezoelectric macro fibre composite on carbon fibre composite structures
摘要： This paper presents a finite element (FE) model developed using commercial FE software COMSOL to simulate the multiphysical process of piezoelectric vibration energy harvesting (PVEH), involving the dynamic mechanical and electrical behaviours of piezoelectric macro fibre composite (MFC) on carbon fibre composite structures. The integration of MFC enables energy harvesting, sensing and actuation capabilities, with applications found in aerospace, automotive and renewable energy. There is an existing gap in the literature on modelling the dynamic response of PVEH in relation to real-world vibration data. Most simulations were either semi-analytical MATLAB models that are geometry unspecific, or basic FE simulations limited to sinusoidal analysis. However, the use of representative environment vibration data is crucial to predict practical behaviour for industrial development. Piezoelectric device physics involving solid mechanics and electrostatics were combined with electrical circuit defined in this FE model. The structure was dynamically excited by interpolated vibration data files, while orthotropic material properties for MFC and carbon fibre composite were individually defined for accuracy. The simulation results were validated by experiments with < 10% deviation, providing confidence for the proposed multiphysical FE model to design and optimise PVEH smart composite structures.
关键词： Energy harvesting,Multiphysics,FE,CRFP,MFC,COMSOL
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE International Ultrasonics Symposium (IUS) - Kobe, Japan (2018.10.22-2018.10.25)] 2018 IEEE International Ultrasonics Symposium (IUS) - Fast SAW Device Simulation in COMSOL Using the Hierarchical Cascading Method
摘要： Using the hierarchical cascading method for modeling semiconductor devices makes it possible to achieve high accuracy by considering the influence of the details of the structure of the device. In this paper, we consider the simulation of a quantum cascade laser (QCL) with a periodic structure. The simulation is performed using the finite element method (FEM) in the COMSOL Multiphysics software. The results show that the proposed method allows to obtain the characteristics of the device with high accuracy.
关键词： finite element method,quantum cascade laser,COMSOL Multiphysics,simulation
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Intelligent and Advanced System (ICIAS) - Kuala Lumpur, Malaysia (2018.8.13-2018.8.14)] 2018 International Conference on Intelligent and Advanced System (ICIAS) - Simulation of Interdigitated Electrodes (IDEs) Geometry Using COMSOL Multiphysics
摘要： Interdigitated Electrodes (IDEs) based sensor in comb-like electrodes structure is also an attractive candidate in gas sensor and biosensor applications, owing to its simple structural design. The sensitivity can be improved based on geometric parameters of the sensor. Hence, in this paper, we study the physical model of the IDEs-based sensor and concern with its geometrical parameters (gap sizes, number of fingers and width of fingers) based on the finite element simulations using COMSOL Multiphysics. The simulation results were used to show the electrical field that generated by the IDEs and compare to other to find the optimum design. Based on the results, the relationship between the geometric parameters and the IDEs performances are studied. The simulation results show that the higher electric fields are generated with the smaller gap size and smaller width of fingers. Besides that, the results show that the gap size and the width of fingers affect the IDEs performance significantly compared to the number of fingers. The IDE with the design 18 fingers, 0.1 mm gap size between fingers and 0.1 mm width of the finger is the optimum design which generates 30.6 kV/m average of electric field magnitude.
关键词： IDEs,COMSOL Multiphysics,geometry parameter
更新于2025-09-23 15:22:29
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A fully coupled numerical simulation of a hybrid concentrated photovoltaic/thermal system that employs a therminol VP-1 based nanofluid as a spectral beam filter
摘要： The realistic numerical modelling of multiphysics applications is an efficient way to precisely predict the operation of concentrated solar systems. Although many multiphysics conjugating approaches have been proposed in the literature, it is difficult to adopt such methods into simulating complex concentrated solar technologies. Consequently, this study introduces a novel 2D:3D numerical optical, thermal and electric coupling approach for a hybrid compound parabolic concentrator photovoltaic/thermal (CPC-PV/T) collector using a nanofluid as a spectral beam filter. In this approach, the volumetric absorbed radiation in each component of the system obtained from the non-gray 2D model is patched into the 3D model as a volumetric heat source using sophisticated computational tools. The main features of the full coupling method (FCM) are extensively analyzed and compared with the other two coupling methods previously adopted. Further, the module performance has been investigated employing both the nanofluid and base-fluid spectrum filters (BF-filter) compared with a stand-alone concentrated PV cell. From findings, the FCM can be applied to reveal more realistic operation characteristics of the proposed system compared with the other approaches, since the FCM can take into account the non-uniformity of solar illumination and the direction of reflected solar beams upon the receiver, along with the variation in the optical characteristics of utilized materials over the solar irradiance. Additionally, suspending indium tin oxide (ITO) nanoparticles into the Therminol VP1 oil raises the absorption rate over the thermal-bands with 62.5% higher than the use of BF-filter, whilst the cell temperature and the transmitted irradiance within the PV-band are obviously declined.
关键词： Radiative heat transfer,Multiphysics coupling method,Nanofluid,Concentrated photovoltaic/thermal system,Spectral beam filter
更新于2025-09-23 15:21:01
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Photonic Design, Verification, and Implementation
摘要： The requirement of different sectors such as healthcare, telecommunications, and industry for new systems that will provide higher performance and lower foot-print has triggered the development of many new photonic-based solutions. A key aspect of the development of an optical system is the design and verification before its production to reduce failure and, as consequence, the time-to-market. There are commercial software solutions able to simulate and to analyze the packaging of optical systems, photonic integrated circuits (PICs) based devices, transmission systems & networks, and fiber-optic lasers & amplifiers. Also, it is possible to take into account thermal and mechanical issues by multiphysics simulations. In this article, we explore the different available solutions to simulate your optical design before the production at the component level including free-form optics and photonic integrated circuits (PICs) and also at the system level.
关键词： photonic integrated circuits,multiphysics simulations,photonic-based solutions,optical system design
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting - Boston, MA, USA (2018.7.8-2018.7.13)] 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting - An Origami Inspired Circularly-Polarized Folding Patch Antenna Array
摘要： This work investigates and develops the physical reconfiguration and deployment of a previously designed 2x2 corporate-fed microstrip patch antenna array. The physical reconfiguration of the antenna is achieved using a Miura-ori fold pattern due to its utilization for deployment. Increasing the fold angle impacts the input impedance and beamforming capabilities by changing the element spacing and orientation. The previous design experienced a graceful degradation in electromagnetic performance as the fold angle increased. Further optimization led to a more robust and functional antenna array system. The antenna is enhanced by designing the array with circularly polarized patch elements. The use of circular polarization eliminates the need to study the polarization changes during intermediate folding states and enables pattern reconfigurability. The performance of the circularly polarized array is evaluated over a comprehensive range of angles to evaluate the impact of physical reconfiguration. Results from a simulated circularly polarized array are provided for a 3GHz design.
关键词： multiphysics simulation,adaptive arrays,origami,microstrip antenna arrays
更新于2025-09-19 17:15:36
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Heterojunction Perovskite Solar Cells: Opto-Electro-Thermal Physics, Modeling, and Experiment
摘要： Organic-inorganic heterojunction perovskite solar cell (PSC) is promising for low-cost and high-performance photovoltaics. To further promote the performance of PSCs, understanding and controlling the underneath photoconversion mechanisms are highly necessary. Here, we present a comprehensive opto-electro-thermal (OET) study on the heterojunction PSCs by quantitatively addressing the coupled optical, carrier transport and thermodynamic behaviors within the device. With achieving a well agreement with the experiment, we theoretically explore the thermodynamic mechanisms involving the energy conversions and focus especially on the origins of the various energy losses in PSCs. We summarize six categories of microscopic heat conversion processes in the heterojunction PSC, where the Joule and Peltier heats can be defined as the intrinsic losses in PSCs. Moreover, we also discuss the possible manipulation methods to decrease the energy losses, e.g., by tailoring the doping concentration and energy-level alignment. An exemplified OET optimization is also presented, which predicts that the PCE of the fabricated PSC can be enhanced from 21.37% to 23.84%.
关键词： photovoltaics,multiphysics simulation,perovskite solar cells,opto-electro-thermal physics,optimization design,heterojunction devices
更新于2025-09-19 17:13:59
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LAO-NCS: Laser Assisted Spin Torque Nano Oscillator-Based Neuromorphic Computing System
摘要： Dealing with big data, especially the videos and images, is the biggest challenge of existing Von-Neumann machines while the human brain, benefiting from its massive parallel structure, is capable of processing the images and videos in a fraction of second. The most promising solution, which has been recently researched widely, is brain-inspired computers, so-called neuromorphic computing systems (NCS). The NCS overcomes the limitation of the word-at-a-time thinking of conventional computers benefiting from massive parallelism for data processing, similar to the brain. Recently, spintronic-based NCSs have shown the potential of implementation of low-power high-density NCSs, where neurons are implemented using magnetic tunnel junctions (MTJs) or spin torque nano-oscillators (STNOs) and memristors are used to mimic synaptic functionality. Although using STNOs as neuron requires lower energy in comparison to the MTJs, still there is a huge gap between the power consumption of spintronic-based NCSs and the brain due to high bias current needed for starting the oscillation with a detectable output power. In this manuscript, we propose a spintronic-based NCS (196 × 10) proof-of-concept where the power consumption of the NCS is reduced by assisting the STNO oscillation through a microwatt nanosecond laser pulse. The experimental results show the power consumption of the STNOs in the designed NCS is reduced by 55.3% by heating up the STNOs to 100?C. Moreover, the average power consumption of spintronic layer (STNOs and memristor array) is decreased by 54.9% at 100?C compared with room temperature. The total power consumption of the proposed laser assisted STNO-based NCS (LAO-NCS) at 100?C is improved by 40% in comparison to a typical STNO-based NCS at room temperature. Finally, the energy consumption of the LAO-NCA at 100?C is expected to reduce by 86% compared with a typical STNO-based NCS at the room temperature.
关键词： COMSOL multiphysics,power efficient,laser,spin torque nano-oscillators,neuromorphic computing system
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) - Ottawa, ON, Canada (2019.7.8-2019.7.12)] 2019 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) - On the sensitivity of optical fiber surface plasmon resonance based sensor for detection of dielectric analytes using COMSOL Multiphysics
摘要： Due to the importance of the public health toward the exposure to hazardous gases, real-time and sensitive gas sensors are among the priorities at present. Among different types of gas sensors, optical sensors with advantages like high sensitivity, low cost, miniaturization, and online monitoring have received great attention between the researchers. In this article, a fiber optic sensor based on surface plasmon resonance (SPR) of gold thin film is simulated by COMSOL Multiphysics. For this purpose, a single-mode optical fiber was considered to be uncladed on its middle part and coated with a thin film of gold and the sensitivity and resonance condition of the device was investigated as a function of thickness of the metal.
关键词： Optical Fiber,COMSOL Multiphysics,Gold,Sensor,Surface Plasmon
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) - Zhenjiang, China (2019.8.4-2019.8.8)] 2019 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) - Simulation of Local Laser Annealing of Amorphous TiNiCu Alloy to Create Nanostructured Functional Material
摘要： Present work considers simulation via Comsol Multiphysics software of local laser annealing of amorphous TiNiCu thin ribbon to create a layered nanostructured crystalline-amorphous functional material with the two-way shape memory effect, which is intended for manufacturing of the nanoactuator. Several simulations were performed with different parameters of laser radiation, such as pulse duration and power density. Laser treatment was simplified as a boundary heat source at sample surface.
关键词： liquid,crystalline state,laser treatment,nanotweezers,Comsol Multiphysics,amorphous,state,shape memory effect,quenching
更新于2025-09-16 10:30:52