Computational study of different venturi and orifice type hydrodynamic cavitating devices

Kuldeep,; Saharan, Virendra Kumar

doi:10.1016/s1001-6058(16)60631-5

Cited by 66 publications

(15 citation statements)

References 25 publications

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“…By comparing different cavitating devices, it is found that orifice plate 1 with configuration of multiple holes with small diameter yielded maximum efficiency as compared to other plate in all parameters studied. Similar results were found in production of methyl ester [30]; computational study of different venturi and orifices [36]. The reason behind this is enhanced cavitational activity occurred due to more shear force witnessed by liquid generating large number of small cavities and its subsequent collapse.…”

Section: Discussionsupporting

confidence: 79%

Comparing geometric parameters of a hydrodynamic cavitation process treating pesticide effluent

Randhavane

2018

Environmental Engineering Research

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Paper focuses on comparison between two different orifice plate configurations (plate number 1 and plate number 2) used as cavitating device in the hydrodynamic cavitation reactor for improving pollutant removal efficiencies. Effect of four different parameters such as hydraulic characteristics (in terms of range of flow rates, orifice velocities, cavitation number at different inlet pressures); cavitation number (in range of 5.76-0.35 for plate number 1 and 1.20-0.35 for plate number 2); inlet pressure (2-8 bars) and reaction time (0 to 60 min) in terms of chemical oxygen demand (COD) removal and chlorpyrifos degradation has been studied and compared. Optimum inlet pressure of 5 bars exists for degradation of pollutants for both the plates. It is found that geometry of orifice plate plays important role in removal efficiencies of pollutant. Results obtained confirmed that orifice plate 1 with configuration of 1.5 mm 17 holes; cavitational number of 1.54 performed better with around 60% COD and 98% chlorpyrifos removal as compared to orifice plate 2 having configuration of 2 mm single hole; cavitational number of 0.53 with 40% COD and 96% chlorpyrifos in 2 h duration time.

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Section: Discussionsupporting

confidence: 79%

Comparing geometric parameters of a hydrodynamic cavitation process treating pesticide effluent

Randhavane

2018

Environmental Engineering Research

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“…Previous works indicated that structure and dimensions of a Venturi cavitator influenced cavity length [29][30][31] , breakup 22 and pressure oscillation 32,33 . Divergence angle significantly changes the flow condition in a Venturi Table 1.…”

Section: Experimental Investigation Of the Dynamic Cavitation Behaviomentioning

confidence: 99%

Experimental investigation of the dynamic cavitation behavior and wall static pressure characteristics through convergence-divergence venturis with various divergence angles

Liu

Fan

et al. 2020

Sci Rep

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As a highly efficient and energy-saving cavitation method, Venturi cavitation is widely used in many industrial fields. This study synchronously investigated the cavity behavior and its corresponding wall static pressure characteristics in Venturi channels with various divergence angles to research the role of the divergence angle in cavity shape and the wall static pressure oscillation. Five rectangular Venturi channels with different divergence angles (4°, 6°, 8°, 10°, and 12°) were tested at the cavitation number (0.3–1.0). Based on the dynamic behaviour of gas–liquid interface, three cavity shedding types were identified: front shedding (I), central shedding (II) and tail shedding (III). A modified correlation for predicting average cavity length was proposed with the consideration of the effect of the divergence angle. Combined with the wall static pressure characteristics, as the divergence angle increased, the wall static pressure fluctuation in the Venturi became more intense. According to the wall static pressure oscillation characteristics, for the larger divergence angles (θ = 6°, 8°, 10° and 12°), the wall static pressure oscillation frequency was the same as the cavity shedding frequency and increased with the increase of the divergence angle. For smaller divergence angle (θ = 4°), no definite periodicity in pressure oscillation frequency could be observed.

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“…Orifice plates [22,24,35,[37][38][39], Venturi tubes [40,41], and high-pressure nozzles [42][43][44][45][46][47][48] are examples of static HC elements [49]. While they are cheap and simple devices, but they require powerful feeding pumps due to the high pressure loss needed to generate HC in these types of devices.…”

Section: Hc Reactors: Technical Aspectsmentioning

confidence: 99%

Plant and Biomass Extraction and Valorisation under Hydrodynamic Cavitation

Ferreira

Crudo³

et al. 2019

Processes

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Hydrodynamic cavitation (HC) is a green technology that has been successfully used to intensify a number of process. The cavitation phenomenon is responsible for many effects, including improvements in mass transfer rates and effective cell-wall rupture, leading to matrix disintegration. HC is a promising strategy for extraction processes and provides the fast and efficient recovery of valuable compounds from plants and biomass with high quality. It is a simple method with high energy efficiency that shows great potential for large-scale operations. This review presents a general discussion of the mechanisms of HC, its advantages, different reactor configurations, its applications in the extraction of bioactive compounds from plants, lipids from algal biomass and delignification of lignocellulosic biomass, and a case study in which the HC extraction of basil leftovers is compared with that of other extraction methods.

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Computational study of different venturi and orifice type hydrodynamic cavitating devices

Cited by 66 publications

References 25 publications

Comparing geometric parameters of a hydrodynamic cavitation process treating pesticide effluent

Comparing geometric parameters of a hydrodynamic cavitation process treating pesticide effluent

Experimental investigation of the dynamic cavitation behavior and wall static pressure characteristics through convergence-divergence venturis with various divergence angles

Plant and Biomass Extraction and Valorisation under Hydrodynamic Cavitation

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