Experimental and computational analyses for induced cavitating flows in orifice plates

Cappa, Otávio Augusto Puglieri; Soeira, Thiago Vinicius Ribeiro; Simões, André Luiz Andrade; Junior, Guilherme Barbosa Lopes; Gonçalves, Julio Cesar de Souza Inácio

doi:10.1007/s43153-019-00007-8

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…Moreover, when the orifice plate is used as a HC device, it is easy to maintain and frequent calibration or adjustment is not required [37]. Furthermore, by adjusting the geometric parameters of the orifice plate (such as the number of holes, the size of holes and the shape of holes), different strength of HC effect can be achieved [38].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of uniform sized ZnS quantum dots using hydrodynamic cavitation and their characterization

Zhang,

Qi,

Liu

et al. 2024

Phys. Scr.

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As representative non-toxic cadmium-free quantum dots (QDs), ZnS QDs with high quantum efficiency, super stability and excellent biocompatibility had attracted wide attention in the fields of photocatalysis, solar cells and biomedicine. In this study, hydrodynamic cavitation (HC) technology was applied to the preparation of ZnS QDs. By adjusting HC device parameters, water soluble ZnS QDs with small particle size, narrow particle size distribution range, high absorbance, high luminous efficiency and high quantum yield were prepared. The morphology, size distribution, element composition and optical properties of ZnS QDs were studied by various characterization methods. ZnS QDs with average particle size of 1.48 nm, fluorescence quantum yield of 34.07% and Stokes shift of 112 nm were obtained. In addition, the mechanism of preparation of ZnS QDs by using HC method was also studied. It is hoped that this HC technology can provide a new idea for large-scale preparation of ZnS QDs with excellent properties.

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Section: Introductionmentioning

confidence: 99%

Synthesis of uniform sized ZnS quantum dots using hydrodynamic cavitation and their characterization

Zhang,

Qi,

Liu

et al. 2024

Phys. Scr.

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“…On the other hand, they have also shown that Venturi can produce cavitation clouds under certain pressure conditions. Cavitation clouds can reduce cavity collapse intensity and, consequently, pollutant removal efficiency (CAPPA et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Removal of natural organic matter in waters using hydrodynamic cavitation and hydrogen peroxide (HC-H2O2)

Araujo

Soeira

Poleto

et al. 2020

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The presence of natural organic matter (NOM) in water does not present direct risk to the human body or to the environment. However, its presence along with other pollutants can lead to countless issues and damage human health and the environment. The hydrodynamic cavitation (HC) phenomenon started being used in the early 21st century as a process capable of treating supply-water and wastewater based on pollutant and pathogen degradation. Process effectiveness increases when it is combined to chemical agents, creating an advanced oxidation process (AOP). Although several studies have presented broaden applications for the HC process, its use for NOM removal from supply-water was not yet assessed; therefore, it remains a gap in scientific knowledge. The aim of the current study is to assess HC potential in NOM removal. In order to do so, the experiments were carried out in bench scale hydrodynamic cavitation system operated at batch model within 15-min duration period-of-time. In addition, decantation experiments (24-h period-of-time) were performed in order to check HC influence on molecules found in reaction medium after the exposure of NOM to the phenomenon. NOM was produced by a synthetic humic acid (HA) matrix at fixed concentration of 100 ppm. In total, 16 experiments were carried out; each experiment was featured by the following pair: pH (2.6, 3.0, 3.5 and 5.5) and hydrogen peroxide (0, 1, 5 and 30 mL). The best removal efficiencies (34%-36%) were observed in the most acidic pH ranges (2.6-3.0) at H2O2 concentration of 15mL. Results have presented high NOM removal efficiency (approximately 90%) after decantation at the most acidic pH ranges, as well. It can be explained by the fact that hydrodynamic cavitation in acid solution can break molecular structures suspended in the liquid medium, which favors decantation. Based on the present study, hydrodynamic cavitation with hydrogen peroxide addition can remove NOM from water; moreover, pH control is an essential factor for process development.

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Bioactives from microalgae: A review on process intensification using hydrodynamic cavitation

Mittal

Ranade

2023

J Appl Phycol

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Microalgae are emerging as an important renewable and sustainable source of high-value biomolecules having applications in food, cosmetics, pharmaceutical, agrochemicals and fuel industries. Deriving high-value biomolecules from micro-algae however faces numerous process and technological challenges. It is essential to develop innovative ways of intensifying processes used for valorising microalgae. Hydrodynamic cavitation (HC) offers an attractive platform for process intensification relevant to microalgae because of its scalability, ability to handle dense slurries, intense physicochemical effects, and low cost. Here we briefly review the overall processes involved in deriving high-value biomolecules from micro-algae. Opportunities for intensifying these processes and enhancing productivity of processing microalgae via HC are then identified and critically reviewed. The current state of the art and yet unresolved challenges are highlighted. An attempt is made to identify specific suggestions to help direct future research efforts. The review will be useful for researchers and practitioners aiming to harness HC for deriving high-value products from microalgae.

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Experimental and computational analyses for induced cavitating flows in orifice plates

Cited by 10 publications

References 39 publications

Synthesis of uniform sized ZnS quantum dots using hydrodynamic cavitation and their characterization

Synthesis of uniform sized ZnS quantum dots using hydrodynamic cavitation and their characterization

Removal of natural organic matter in waters using hydrodynamic cavitation and hydrogen peroxide (HC-H2O2)

Bioactives from microalgae: A review on process intensification using hydrodynamic cavitation

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