3D CDF modeling of ship's heeling moment due to liquid sloshing in tanks - a case study

• Autorzy: Krata P. , Jachowski J.
• Języki publikacji: EN

Abstrakty

EN

Modeling of liquid sloshing inside partly filled ships' tanks can be carried out by a variety of methods. The simplest and perhaps the less reliable is a quasi-static approach which is, however, recommended in the Intact Stability Code by the International Maritime Organization. Hence the only advantage of the static estimation of liquid sloshing is simplicity of calculations, the research into the application of CFD (Computational Fluid Dynamics) was performed in Department of Ship Operation at Gdynia Maritime University. The paper presents results of numerical simulations o f a liquid sloshing phenomenon performed by means of a code Fluent. The research was focused on a computation of the heeling moment affecting stability of a vessel, especially on the dynamic effects, which are omitted in obligatory intact ship's stability regulations nowadays. The computed distributions of dynamic pressures on tank walls were carried out for large oscillation amplitude which is characteristic for stormy sea conditions. Ali the simulations were computed in 3D mode and they provide high accuracy results. A case study described in the paper enables realistic comparison of the results of CFD liquid sloshing simulations and the simple statics based computations. The study reveals some weaknesses of the contemporary quasi-static approach towards the free surface effect and it might be the contribution to the more sophisticated estimation of the ship's stability than it is achieved nowadays.

Słowa kluczowe

EN

CFD; safety against capsizing; ship's stability; liquid sloshing; free surface effect

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 4
• Strony: 245--251
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Krata P.

autor

Jachowski J.

• Gdynia Maritime University, Department of Ship Operation Jana Pawia II Av. 3, 81-345 Gdynia, Poland tel: [phone], fax: [phone],

Bibliografia

• [1] Akyildiz, H., Unal, E., Experimental investigation of pressure distribution on a rectangular tank due to the liquid sloshing, Ocean Engineering, No. 32, pp. 1503-1516, 2005.
• [2] Liu, D., Lin, P., A numerical study of three-dimensional liquid sloshing in tanks, Journal of Computational Physics, Vol. 227, pp. 3921-3939, 2008.
• [3] FLUENT Tutorial Guide, Fluent Inc. 2006.
• [4] Francescutto, A., Contento, G., Bifurcations in ship rolling: experimental results and parameter identification technique, Ocean Engineering, No. 26, pp. 1095-1123, 1999.
• [5] Intact Stability Code, International Maritime Organization, London 2002.
• [6] Jachowski, J., Krata, P., Ship’s heeling moment due to liquid sloshing in tanks – 3D attitude, Journal of KONES Powertrain and Transport, Vol. 16, No. 2, pp. 191-198, Warszawa 2009.
• [7] Krata, P., Linear characteristics of sloshing phenomenon for the purpose of on-board ship’s stability assessment, Journal of Theoretical and Applied Mechanics (JTAM), Vol. 47, No. 2, pp. 307-320, Warszawa 2009.