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Towards an absolute...
Towards an absolute scale for adhesion strength of ship hull microfouling
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- Oliveira, Dinis, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Larsson, Lars, 1945 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Granhag, Lena, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2019-04-10
- 2019
- Engelska.
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Ingår i: Biofouling. - : Informa UK Limited. - 0892-7014 .- 1029-2454. ; 35:2, s. 244-258
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Abstract
Ämnesord
Stäng
- In-water ship hull cleaning enables significant fuel savings through removal of marine fouling from underwater surfaces. Unfortunately, cleaning may also shorten the lifetime of hull coatings, with subsequent increase in fouling growth rate. Deleterious effects of cleaning would be minimized by matching cleaning forces to the adhesion strength of early stages of fouling, or microfouling. Calibrated waterjets are routinely used for comparing different coatings in terms of adhesion strength of microfouling. However, an absolute scale is lacking for translating such results into cleaning forces, of interest for design and operation of hull cleaning devices. This paper discusses how to determine such forces, namely using Computational Fluid Dynamics. Semi-empirical formulas are derived for forces under immersed waterjets, where the normal and tangential components of wall forces are given as functions of different flow parameters. Nozzle translation speed is identified as a parameter for future research, as this may affect cleaning efficacy.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Miljöledning (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Environmental Management (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- adhesion strength
- ship hull fouling
- marine fouling
- Energy efficiency
- microfouling
- calibrated waterjet
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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