Department of Mechanical engineering
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Item Editorial for the Special Issue “Heat Transfer Enhancement and Fluid Flow Features Due to the Addition of Nanoparticles in Engineering Applications"(MDPI, 2023-02) Bhattacharyya, SuvanjanThis Special Issue titled “Heat Transfer Enhancement and Fluid Flow Features Due to the Addition of Nanoparticles in Engineering Applications” comprises nine original research articles devoted to recent advances, as well as up-to-date progress, in all areas of heat transfer due to the addition of different types of nanoparticles in engineering and its influence on emerging technologies. The application of nanofluids which are fluids including suspended solid particles with diameters below 100 nm has clearly increased since the past two decades. Nanofluids are considered as potential working fluids to improve heat transfer characteristics compared with conventional fluids due to the high thermal conductivity of the suspended particles. Furthermore, they are ideally suited for practical applications in distinct domains due to their remarkable characteristics. Thermal systems are one of the most important parts of various industries, which have always been researched due to their cooling abilities and improved efficiency. Because of the wide applications of natural convection in cooling industrial tools, this challenging topic has gathered the attention of many researchers. Natural convection has wide applications in various industries and technologies such as growing crystals, cooling microchips, oil extraction, solar collectors, voltage increase transformers, etc. The optimization of heat transfer devices for reaching higher levels of efficiency requires the miniaturization of devices and increased heat transfer per unit surface at the same time. In tandem, this Special Issue highlights the techniques for enhancing convective heat transfer, including passive techniques such as treated surfaces, rough surfaces, extended surfaces, displaced enhancement devices, swirl flow devices, coiled tubes, surface tension devices, and additives for fluids such as nanoparticles.Item Thermal P erformance of N ano R efrigerants: A Short R eview(Journal of Mechanical Engineering Research and Developments, 2021) Bhattacharyya, SuvanjanThe effort to promote energy efficient and environmentally friendly nano based refrigerants is now being favoured. To this effect, in this paper, the new trend, prospects , and investigations of nano based refrigerant in refrigeration systems are reviewed. It was found that various thermal characteristics have been reported as favourable regarding nano refrige rants. These include a reduction in the power consumption, increase in the coefficient of performance (COPr), improved tribological pressure drop property of nano lubricant, and increase in the thermal conductivity of the hybrid refrigerant. The discussions here thus suggest that nano particles are highly favoured to be included in a typical refrigera tion system.