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Recent Trends of Cutting Fluids and Lubrication Techniques in Machining
Published in Yashvir Singh, Nishant K. Singh, Mangey Ram, Advanced Manufacturing Processes, 2023
Nanofluids belong to that class of fluids that are prepared by dispersing nano-sized materials (nanoparticles, nanofibers, and nanotubes) into the base fluid. When added into the base oils, nanoparticles create Brownian motion, which enhances the stability and thermo-physical behavior of the base fluid. As a result, nanofluids possess excellent thermo-physical attributes such as convective heat transfer coefficient, viscosity, and thermal conductivity compared to base fluids. Thus, nanofluids have broader relevance in enhancing heat transfer during several applications in industries, electronics, food, biomedicine, transportation, and nuclear reactors [23–26].
Hybrid Nanofluids
Published in S. Harikrishnan, A.D. Dhass, Thermal Transport Characteristics of Phase Change Materials and Nanofluids, 2023
In present heat transfer applications, the poor thermal conductivity of conventional fluids makes them unsuitable. The most commonly utilized base fluids are water, oil, and ethylene glycol, all of which have a reduced heat transfer capability due to their lower thermal conductivity. With the addition of particularly thermally conductive nano-sized particles to the base fluid, conventional fluids’ heat transfer capacity is improved. The thermophysical and image properties of liquids, such as thermal conductivity, viscosity, oxidative stability, and specific heat capacity, have been dramatically improved by the addition of nanoparticles. Nanofluids can be used in a wide range of industrial applications, including metal cutting, heat exchangers, engine cooling, solar collectors, nuclear cooling, and electronics cooling. Dispersion of nanometer-sized particles into the base fluid is known as “nanofluid” by Choi and Eastman[1–3].
Impingement Cooling of Heated Steel Specimen Using Nano-Fluids: An Experimental Investigation
Published in Purna Chandra Mishra, Muhamad Mat Noor, Anh Tuan Hoang, Advances in Mechanical and Industrial Engineering, 2022
Sagni Majumdar, Rouhan Mondal, Purna Chandra Mishra, Santosh Kuma Nayak
Keeping in mind the above factors, another factor which plays a vital role is the quality of water or coolant used in cooling of material. The thermal conductivities of fluids can be increased by mixing small solid particles at Nano level in the fluids. In our project, the water used for cooling is mixed with the nanoparticles of different concentrations and nanoparticles of varied materials to see which shows better result. Proper mixing of water and nanoparticles enhances the thermal properties of fluids, thereby increases the heat transfer rate. Nanoparticles made of metal oxides, carbides, etc. are used in the nanofluids. Particles at nanosized display properties are different from those of regular particles. When compared with ordinary particles, nanoparticles have a significant increase in the surface areas and a considerable ability for heat transfer improvement.
The role of nanofluids in the performance augmentation for the solar collectors used in solar water heating
Published in International Journal of Ambient Energy, 2023
Markndeyulu Vuggirala, N. Alagappan, C. H. V. K. N. S. N. Moorthy
This review leads to the following key conclusions. The type of solar collector type may be chosen depending upon the capacity requirement. However, parabolic trough collectors are observed to be giving best outcome compared to the flat plate and evacuated tube collectors.Nanofluids are found to be performing best in the augmentation of the heat transfer performance by the heat transfer fluids.Nanofluids with Carbon Nano Tubes are found to be the best performers due to their top thermal conductivity.However, agglomeration and stability are the major challenges while using nanofluids.Though the performance analysis can be carried out using theoretical modelling, software simulation, experimental study is suggested for having a complete and real outcome.
Comparative studies on thermal performance of spiraled rod inserts in laminar flow with nanofluids
Published in International Journal of Ambient Energy, 2023
S. Anbu, P. Kalidoss, K. Elangovan, P. Arunkumar
Nanofluids and inserts have been actively researched as prospective solutions for improving heat transmission in a variety of applications. However, they also have some limitations that should be considered. Limitations of Nanofluids: (i) Clogging: The small size of the nanoparticles might cause clogging in the system's channels and pipes, which can be troublesome in some applications. (ii) Stability issues: Nanoparticles have a propensity to agglomerate and settle out of the fluid, which causes stability problems and reduces the efficiency of the nanofluids. (iii) Corrosion: Due to their high surface area and reactivity, nanoparticles may potentially promote corrosion of the components in the heat transfer system (iv) High cost: Nanofluid creation and handling can be costly due to the high cost of nanoparticles and the additional processing steps required to prepare the nanofluids.
Numerical simulation to the activation energy study on blood flow of seminal nanofluid with mixed convection effects
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2023
As is known, a nanofluid is a liquid that contains nanometer-sized particles, called nanoparticles. These fluids are designed into colloidal suspensions of nanoparticles in the base fluid. The nanoparticles used in nanofluids are usually made of metals, oxides, carbides, or carbon nanotubes. In the early time, nanofluid is used to deliver heat, drugs, light, or other substances to certain types of cells. The particles are designed to be attracted to diseased cells, allowing those cells to be treated directly. This performance weakens damage to healthy cells in the body and allows early detection of the disease. Generally, modern science and researchers have discovered many applications and great importance of nanofluids like electronics, fuel cells, solar cells, batteries, space, fuels, better air quality, chemical sensors, etc.… Mosayebidorcheh and Hatami [21] examined the influences of the chemical reaction and magnetic field on the blood flow of nanofluid, and they use the least square method to extract a series of solutions. Akram et al. [22] studied the Prandtl nanofluids with Hybrid effects in a non-uniform inclined channel. Bhatti [23] securitized the nature of magnetized Gold (Au) Nanoparticles inspired by intra-Uterine Nanofluid Flow. Numerous deliberations of nanofluid flow combined with heat energy can be realized through the studies [24–30].