Modelling the erosion efficiency of cavitation cleaning jets

Vickers, G. W.; Houlston, R.

doi:10.1007/bf00383042

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…A great deal of research has been conducted on understanding the profile of water jets (Davies et al, 1980;Haller et al, 2002;Hrycak et al, 1969;Olive, 1959;Reichman and Cheung, 1980;Shavlovsky, 1972;Summers, 1995;Yanaida, 1974;Vickers et al, 1980;Yanaida and Ohashi, 1978). However, in spite of this, there is still little understanding of the detailed structure and characteristics of water jets in air (Haller et al, 2002).…”

Section: Jet Stream Characterizationmentioning

confidence: 99%

“…The extent of jet decay is dependant primarily on surface tension and aerodynamic forces, with a growing layer of droplets appearing adjacent to the diminishing jet core to form a multi-component flow consisting of inner core fluid, the surrounding air flow, and droplet flow. Research in the field of jet technology has shown that, with increasing distance from the nozzle, the factors that contribute to jet efficiency are the central core jet pressure and to a greater extent liquid droplet impact (Olive, 1959;Reichman and Cheung, 1980;Vickers et al, 1980;Smith et al, 2003). The fluid flow associated with high velocity impinging droplets is complicated and no full understanding has yet been derived (Haller et al, 2002).…”

Section: Consideration Of Droplet Impactmentioning

confidence: 99%

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Ultra scale-down studies of the effect of flow and impact conditions duringE. coli cell processing

Chan

Booth

Mannweiler³

et al. 2006

Biotechnol. Bioeng.

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The ability to recover cells from a fermentation broth in an intact form can be an important criterion for determining the overall performance of a recovery and purification sequence. Disruption of the cells can lead to undesired contamination of an extracellular product with intracellular components and vice versa loss of intracellular products may occur. In particular, the value of directed location of a product in the periplasmic space of say Escherichia coli (E. coli) would be diminished by such premature non-selective cell disruption. Several options exist for cell recovery/removal; namely centrifugation, in batch or continuous configuration, filtration or membrane operations, and in selected cases expanded beds. The choice of operation is dependant on many variables including the impact on the overall process sequence. In all cases, the cells are exposed to shear stresses of varying levels and times and additionally such environments exist in ancillary operations such as pumping, pipe flow, and control valves. In this study, a small-scale device has been designed to expose cells to controlled levels of shear, time and impact in a way that seeks to mimic those effects that may occur during full-scale processes. The extent of cell breakage was found to be proportional to shear stress. An additional level of breakage occurred due to the jet impacting on the collecting surface. Here it was possible to correlate the additional breakage with the impact velocity, which is a function of the distance that the jet travels before meeting the collection surface and the initial jet velocity.

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Section: Jet Stream Characterizationmentioning

confidence: 99%

Section: Consideration Of Droplet Impactmentioning

confidence: 99%

Ultra scale-down studies of the effect of flow and impact conditions duringE. coli cell processing

Chan

Booth

Mannweiler³

et al. 2006

Biotechnol. Bioeng.

View full text Add to dashboard Cite

show abstract

“…These process parameters included surfactant concentration, dissolved oxygen (O 2 ) and carbon dioxide (CO 2 ) contents, pressure drop in the cavitation tube nozzle, hydrophobic particle concentration slurry temperature, and the time interval after nanobubble generation. Vickers and Houlston (1983) characterized some parameters in a cavitation cleaning jet. In this study, a model of erosion damage and the cleaning efficiency of cavitation and conventional cleaning jets is presented.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic cavitation characteristics of an orifice system and its effects on CRUD-like SiC deposition

Kim

Bang

2016

Annals of Nuclear Energy

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“…Some progress has been made in the TFT LCD industry as well; how much vapour is generated through the cavitation and how efficiently the vapour is activated in the nozzle are the current issues under the cavitation theory. The vapour generated by the cavitation in a fluid is used in enhancing the cleaning effect through the nozzle [6]. Although the vapour is generated by various factors, the study mainly focuses on the cavitation theory, main factors of the cavitation, and bubble theory in determining a number of factors affecting the vapour generation.…”

Section: Introductionmentioning

confidence: 99%

Parameter design of water jet nozzle utilizing independence axiom

Lee

Shin

2008

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper explores the design of a water jet nozzle for cleaning the glass surface of a thin film transistor liquid crystal display. The theoretical background in this study is based on cavitation theory, main factors of cavitation, and bubble theory in determining the dominant design parameters (DPs) associated with nozzle design. From the bubble dynamics theory, three functional requirements (FRs) are extracted to maximize the cleaning effects in the context of axiomatic design. Based on the independence design axiom, the decoupled design matrix between FRs and DPs is developed. In this study, the sensitivity of the design matrix is evaluated via both design of experiments (DOEs) based analysis of means and back-propagation neural network-based causality analysis. Axiomatic design solutions are further compared with those obtained from a formal optimization method. This study shows that the axiomatic design with DOE is efficient since it does not require any mathematical formulation of design problem and its solution is easily obtained when the decoupled design matrix is quantitatively described.

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Modelling the erosion efficiency of cavitation cleaning jets

Cited by 10 publications

References 1 publication

Ultra scale-down studies of the effect of flow and impact conditions duringE. coli cell processing

Ultra scale-down studies of the effect of flow and impact conditions duringE. coli cell processing

Hydrodynamic cavitation characteristics of an orifice system and its effects on CRUD-like SiC deposition

Parameter design of water jet nozzle utilizing independence axiom

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