Journal of Recent Trends in Mechanics (e-ISSN: 2582-3213)

A Comprehensive Review on Recent Progress of Energy Harvesting Using Piezoelectric Materials

2023-12-13T10:49:03+0530

This review provides a comprehensive exploration of piezoelectric energy harvesting and explains its foundational theories, recent technological advances, and manifold applications. Piezoelectric materials are capable of converting mechanical vibrations into electrical energy and offer an eco-friendly and adaptable means of power generation. The study delves into the intricate physics and materials science of piezoelectricity, surveying cutting-edge developments in technology, materials, and integration strategies. Real-world applications across diverse sectors, from wearable electronics to IoT devices, underscore the transformative potential of piezoelectric energy harvesting. The literature review also includes analyses of energy conversion mechanisms, wind-driven energy harvesting, walking-induced energy harvesting, and various piezoelectric structure configurations. The paper concludes by addressing the challenges, advantages, and applications of piezoelectric materials, emphasizing their pivotal role in sustainable energy solutions and technological advancements. This comprehensive examination illuminates the urgency of understanding and harnessing piezoelectric energy harvesting in the global pursuit of reduced energy consumption and environmentally conscious practices.

Design and Analysis of Hybrid Composite Materials for Roofing Application using FEA Modelling - Case Study

2023-11-20T13:58:33+0530

In engineering sciences, material plays the most inevitable role in many areas like Civil, Mechanical, Electronics and Electrical Engineering. Without basic materials it is not possible to develop products as per the specific requirements of customers so, materials are treated as important assets for developing usable products like automobiles, spacecraft etc. Specifically, composite materials are the modern improvement in material science and engineering. Today in most engineering areas composite plays an essential role. Generally composite materials are classified into various types such as: 1. Natural composites 2. Polymer composites. Composite materials for several engineering applications provide good results for making many innovative products. In this work, the hybrid composite material study is done by treating polymer matrix composites (E glass fibre) as matrix and natural fibre (sisal fiber) as reinforcement using Epoxy resin as a bond interface between matrix and reinforcement phases. In this article, an attempt has been made to design the sample specimen for civil applications especially roofing areas for building construction work. In the initial phase, the material is designed and analyzed using the ANSYS (FEA) package. Using the FEA package both structural and thermal analysis simulation is done to test the effect of stress, strain and Temperature over the outer surface of material designed for specific use say roofing applications.

Analysis of Double Diffusion Convection Prandle Nanofluid on a Stretching Surface with Internal Heat Generation

2023-10-12T11:45:55+0530

In this project, we have developed a mathematical model for a double diffusion convection prandle nanofluid over a stretching surface with internal heat generation. Here, the findings are extended by examining double diffusion convection Prandle nanofluid over a stretchable surface that generates heat internally. The basic mathematical tools available in the literature of the Navier stokes equations, Energy equation, Concentration equation and Solutal concentration equation are utilized to capture flow over a stretching sheet with internal heat generation in the form of partial differential equations (PDEs). Using suitable similarity variables after algebraic manipulation the system of PDE is converted into a coupled nonlinear system of ordinary differential equations. Correct solutions are rare because of the non-linearity. Therefore, analysis of various physical quantities is performed numerically by Parametric Continuation Method (PCM) with the help of Matlab. The flow field, temperature change, concentration analysis, Solutal concentration, Skin friction and heat transfer through the boundary are studied parametrically. Graphical and tabulated results are drawn that show how different parameters such as prandle number, Reynolds’s number, internal heat generation parameter, Nano Lewis number, thermospheric parameter, Brownian parameter, Magnetic Reynolds’s number and grashop parameter affect the physical characteristics of the flow.

Improvement of Heat Transfer Coefficient through Double Pipe Use of Inward and Outward Sinusoidal Ribs for a Double Pipe Heat Exchanger

2023-11-23T14:36:03+0530

When heat transfer augmentation techniques are required in industrial applications; waste heat recovery plays a crucial role. In many industrial processes and energy systems, efficient heat transfer is essential. This study looks into adding inward and outward sinusoidal ribs to a double-pipe heat exchanger to increase the heat transfer coefficient. On the inner pipe of the heat exchanger, inward and outward sinusoidal ribs are installed to increase the rate and coefficient of heat transfer for counter-flow heat exchangers. With temperatures and velocities of 15°C and 80°C, respectively, and 0.01 m/s and 0.005 m/s, water is used as the working fluid in both the hot and cold fluids in the present experiment. The inner pipe's ribs caused the hot fluid's turbulence, which significantly improved the cooling. In this study, Inward quadruple sinusoidal rib tubes generated the highest heat transfer rates out of all the ribs. The proposed configuration aims to optimize the convective heat transfer characteristics, leading to improved overall heat exchange performance. The double-pipe heat exchanger, a common design in many applications, consists of an inner and outer pipe. The inner pipe is modified with sinusoidal ribs, strategically positioned in both inward and outward orientations. The purpose of these ribs is to create turbulence and improve convective heat transfer between the fluid in the inner pipe and the fluid in the annular space by upsetting the flow patterns.

Minimal Quantity Lubrication with MoS2 Cutting Fluid for the Machining of Aisi316 Stainless Steel

2023-11-01T11:02:54+0530

There has been a dramatic uptick in the creation of cutting-edge materials for high-performance uses during the last decade. While these materials address several technical concerns, their poor machinability features make them difficult to machine. There are a plethora of plans available. However, the minimal quantity lubrication (MQL) approach is one of the environmentally friendly machining methods that has received a lot of attention recently. Molybdenum disulfide (MoS2) is well-known as a solid lubricant, but its potential as an effective medium in MQL, especially in turning operation, has not yet been investigated. This study compared the effectiveness of paraffin oil (a mineral oil) as a base fluid for turning AISI 316L grade austenitic stainless steel to conventional water-soluble oil (WSO) using a response surface methodology (RSM)-based experimental design. The findings showed that MoS2's micro-particles had superior heat transmission capabilities, which helped lower the cutting temperature. The same powder was also effective in reducing cutting power and thinning chips while enhancing the quality of the finished product's finish. It was shown that conventional cutting fluid blended with MoS2 produced better machining results than the fluid used alone. Grey relational analysis (GRA)-based multi-objective optimisation was also attempted to find the best cutting condition. The machining of the AISI316L grade stainless steel with MoS2 solid lubricant combined with an appropriate base fluid under an MQL environment has therefore been shown to have considerable potential.