This study explores transient magnetohydrodynamic (MHD) heat and mass transfer in the flow of a hybrid nanofluid over a stretching surface, considering both steady and unsteady scenarios. The investigation incorporates chemical reactions, slip boundary conditions, and the effects of thermal radiation. The hybrid nanofluid, composed of copper oxide (CuO) and gold (Au) nanoparticles in a water-based fluid, demonstrates enhanced thermal performance compared with base fluids. Key findings reveal that higher nanoparticle concentrations significantly improve heat transfer, highlighting the potential of hybrid nanofluids in advanced thermal management applications. Additionally, machine learning models effectively predict heat transfer characteristics with high accuracy (R² = 0.99), showcasing their effectiveness in complementing traditional numerical methods. These findings contribute to the understanding of hybrid nanofluids in complex thermal systems and highlight the utility of emerging computational tools for thermal analysis.

Rotor blades are a critical structural component of the tidal turbine since they are responsible for harvesting the kinetic energy of the water and transmitting it through the main drive train to the generator. At hand the rotor blades are manufactured using the materials like Conventional Steels and Aluminium Alloys. With the use of these existing materials it results in relatively low fracture toughness in high strength conditions, limited performance at elevated temperature. One of the main drawback of steel is suspected to corrosion and it also loses its properties at high temperatures. To overcome this issue Composite Material is being used. Rotor blade is made up of composite materials. The materials are glass fiber epoxy and natural fiber(sugar cane fiber) with the composition 10% of natural fiber and 90% of glass fiber epoxy. The modeling of the Rotor blade is carried out in SOLID WORKS and analysed using ANSYS FLUENT, Also the rotor blade is fabricated by HAND LAY-UP METHOD. The mechanical properties are tested. The results are validated.

In recent days utility of renewable energy sources is increased for various purposes and at varied locations under various conditions. Among all such sources wind source is one of the important sources being used extensively. The angle at which the surface of the blade contacts the wind is the pitch angle. In varying wind conditions, it is variable for optimum operation of the turbine and to prevent over speed and electrical over load in high winds. Pitch variation is allowed by gears in the hub of the rotor. It is proposed to analyse the effect of variations in pitch angles on wind turbines. The performance characteristics of the wind turbines by varying the pitch angle are implemented in MATLAB. The values of tip speed ratio of a wind turbine are estimated and coefficient of power is also evaluated. The coefficient of power is achieved at a particular tip speed ratio, pitch angle. By using Mat lab, the optimized output is obtained for interaction, the data can be plotted very easily, and graphical interactive tools can change the sizes, colours, scales etc.

In the recent years, we are facing severe water problems. There is little pure water left on earth and nearly all of this is polluted by both pollutants and toxic chemicals. Solar still is a popular solar device used for converting available brackish or waste water into potable water. Because of its lower productivity, it is not popularly used. The yield of the solar still is very less compared to that of other conventional desalination methods. The basin solar still is developed by adding a magnetic treatment unit. The study is conducted by testing the solar still by using with magnetic treatment unit and without magnetic treatment unit. Parameters like temperature of the basin solar still, glass cover surface temperature, ambient temperature, productivity, efficiency and other properties will be calculated and compared for the above mentioned tests.

This paper examines and estimates the similarities or dissimilarities of two methods for dc to ac power conversion. Cascaded H-Bridge Inverter is the first approach and new Multi-level Scheme which has H-Bridge and Level Modules. SIMULINK/MATLAB software is used to show the output voltage and current waveforms. Real power, reactive power and the total distortion of harmonics in resultant load voltage developed by the two methods are compared. It is indicated that THD developed in the new multi-level scheme is advantageous up to some stages of the first scheme. And the resultant real and reactive powers are effective for the latter scheme

Objectives of the proposal are to analyze and design a Pico satellite; the one reason for miniaturizing satellites is to reduce the cost: heavier satellites require larger rockets with greater thrust which also has greater cost to finance. In retrospect, smaller and lighter satellites require smaller and cheaper launch vehicles and can sometimes be launched in multiples. They can also be launched 'piggyback', using excess capacity on larger launch vehicles. Miniaturized satellites allow for cheaper designs as well as ease of mass production, although few satellites of any size other than 'communications constellations' where dozens of satellites are used to cover the globe have been mass-produced in practice.