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Cavitation - Springer Nature

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Last Updated: 10 January 2023

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Surface Polishing of Laser Powder Bed Fused Inconel 625 Surfaces Using Multi-jet Hydrodynamic Cavitation Abrasive Finishing: An Emerging Class of Cleaner Surface Enhancement Process

Polishing the laser powder bed fused parts and obtaining uniform roughness is extremely difficult. The process in this article uses cavitation principles as a helpful tool for polishing hard-to-machine materials within ten minutes. The MJ-HCAF method's efficiency was shown by polished surfaces, which demonstrated the MJ-HCAF's performance. Water is the primary working fluid used by the proposed method, with abrasives averaging 1. 0% to produce a polished surface u2014indicating an emerging class of cleaner manufacturing process. The Product Sustainability Index for a sustainable approach revealed that cavitation-assisted abrasive polishing mode had the highest PSI ranking of 7. 88.

Source link: https://doi.org/10.1007/s40684-022-00471-7


Numerical Investigation of Effects of Silt Particles with Different Mean Diameters on Cavitation Flow Evolution in the Nozzle

The vapor content in silt particle-water cavitation flow was greater than that of pure water cavitation flow, according to the study. Maximum and absolute minimum slip velocities were higher than those in pure water cavitation flow. The silt particle-water cavitation flow change in the nozzle was influenced by two primary factors, including slip speed and turbulent kinetic energy.

Source link: https://doi.org/10.2991/978-94-6463-022-0_3


Cavitation Detection of Centrifugal Pumps Using SVM and Statistical Features

Centrifugal pump is one form of pump that is widely used in industry. Cavitation can be caused by its device that initiates pressure change. Pattern recognition-based fault detection and classification performance are gaining interest from many researchers lately due to its superior detection and classification results. Support vector machine is one of the pattern recognition methods that requires statistical information as input for building the model. ten scientific parameters are extracted from the time-domain vibration signal and selected using Relief Feature Selection in this research. Variance, root mean square, and standard deviation are the most appropriate feature to use for SVM classification, according to the feature selection process. With a 99% certitude, the binary SVM method provides the best view of early cavitation. With an overall accuracy of 100 percent, the Bayesian optimization algorithm with multi-class SVM is the most accurate way to classify all pump conditions.

Source link: https://doi.org/10.1007/978-981-19-0867-5_1


Experimental Investigation on the Effects of Particle Concentrations on Cavitation Development in the Venturi Tube

Experimentally tested various particle sizes on cavitation growth in the Venturi tube. The effects of the concentration on cavitation evolution were various at different times. With the increasing concentration, cavitation evolution was gradually promoted; for T _0 + 30 ms and T _0 + 91 ms seconds, the first and then the second degrees of development became more prominent; at T _0 ms and T _0 + 91 ms moments, the first and then the weaker.

Source link: https://doi.org/10.2991/978-94-6463-022-0_22


Numerical Investigation on Effects of Solid Grain Concentrations on Cavitation Evolution Around NACA0015 Hydrofoil

The effects of solid grains with different concentrations of cavitation evolution around NACA0015 hydrofoil were investigated. The difference between averaged lift and drag coefficients and lift-drag ratio under all concentration conditions was investigated; cavitation bubble evolution was addressed. According to the concentration, the change in the causation bubble formation process and the delivery of streamlines were variable.

Source link: https://doi.org/10.2991/978-94-6463-022-0_24


Effects of Different Silt Particle Concentrations on Cavitation Evolution in the Centrifugal Pump

Numerical experiments on the effects of different silt particle concentrations on cavitation evolution in the centrifugal pump were performed. Under the cavitation number of 0. 9, cavitation evolution degree under the concentration of 1% became more apparent than in pure water cavitation flow; for 5% and 10%, the degrees were lower than that of PWCF. The cavitation evolution degree under all concentration conditions was more prominent than in PWCF at 0. 11.

Source link: https://doi.org/10.2991/978-94-6463-022-0_25


Effect of pressure and time on bioactive content, PPO inactivation, physicochemical and sensory properties of aonla (Emblica officinalis) juice during hydrodynamic cavitation processing

Aonla juice treated with hydrodynamic cavitation at a pressure range of 5 to 30 min was evaluated, according to physical and nutritional characteristics of the juice, with a pressure range of 5 to 30 min. PPO at 95. 98. com for 3 min, but for a dark color with a browning index value of 67. 38 was noted. Thermally treated samples inactivated 100% of PPO at 95 u2103 for 3 min. The retention of various bioactives in thermally treated juice samples was less than that of HC-treated samples.

Source link: https://doi.org/10.1007/s10068-022-01164-2


Numerical Investigation on Heat Transfer Enhancement in Microchannels Through Micro-orifice Induced Cavitation

Thermal control of such components for their efficient operation has gotten more emphasis. Microchannel-based liquid cooling techniques have demonstrated promising success in achieving the above target, and the micro-orifice induced cavitation phenomenon has been instrumental in increasing the product's effectiveness. The present research investigates the heat transfer coefficient variance with orifice size, as well as quantitatively proving the increase of heat transfer in micro-orifice entrenched microchannel in comparison to a single microchannel. The convective heat transfer coefficient was found to be 4. 8 percent at 4. 25 m/s and 15. 6 percent at 4. 76 m/s, compared to that of a straight channel, and the percentage increase of the same was 4. 8 percent. When we reduced the orifice size, it was discovered that the heat transfer coefficient increased with the decrease in orifice area as a result of the decrease in the channel's base temperature.

Source link: https://doi.org/10.1007/978-981-19-3053-9_54


Effect of Pipe-End Material on Water Hammer and Cavitation in Viscoelastic Pipelines

The classical model can give a realistic representation of water hammer in viscoelastic pipelines. This paper discusses the improvement of the numerical solution of water hammer and cavitation in viscoelastic pipelines by including the pipe-end rigidity in boundary conditions. Fluid transient in both downstream and upstream-valve HDPE straight pipe, which are rigidly fixed, is determined by a method of characteristics. Both cavitating and non-cavitating flows are used in classical viscoelastic simulation. Two types of pipe-end material are compared herein: the rigid end and the viscoelastic end.

Source link: https://doi.org/10.1007/978-3-031-14615-2_18


Cavitation-Based Processes for Water and Wastewater Treatment

Cavitation based on advanced oxidation techniques is one of several viable alternatives for recently developed wastewater treatment techniques. Many chemical compounds present in the cavitated liquid phase can be efficiently degraded during the implosion of cavitation bubbles, concentrated electricity, and resulting high temperature and pressure. The main reactions observed in the cavitation zone are chemical deposition and oxidation of dissolved oxygen and hydroxyl radicals produced during the imposition of cavitation bubbles. An increasing number of journals dedicated to various aspects of cavitation phenomena and its application for water and wastewater treatment, as well as hybrid processes based on external oxidants that foster effective formation of radical species in cavitation conditions is being bolstered by an increasing number of journals dedicated to various aspects of cavitation phenomena and its application for water and wastewater treatment. A comparison of hydrodynamic and acoustic cavitation techniques for the same class of pollutants has been discussed.

Source link: https://doi.org/10.1007/698_2022_866

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions