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Free surface flow simulation around a Wigley hull using viscous and potential flow approaches

The incompressible free surface flow around a Wigley hull form has been simulated using a commercial RANSE code using the two-phase Eulerian-Eulerian fluid approach, and a potential flow code using on the Rankine source method. The flow has been simulated around the hull at two Froude numbers and co...

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التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Ahmed, Y. M., Ciortan, C., Wnek, A. D., Guedes Soares, C.
التنسيق: مقال
منشور في: Taylor & Francis Group, London 2015
الموضوعات:
TJ Mechanical engineering and machinery
الوصول للمادة أونلاين:http://eprints.utm.my/id/eprint/59279/
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id my.utm.59279
record_format eprints
spelling my.utm.592792022-04-26T15:07:00Z http://eprints.utm.my/id/eprint/59279/ Free surface flow simulation around a Wigley hull using viscous and potential flow approaches Ahmed, Y. M. Ciortan, C. Wnek, A. D. Guedes Soares, C. TJ Mechanical engineering and machinery The incompressible free surface flow around a Wigley hull form has been simulated using a commercial RANSE code using the two-phase Eulerian-Eulerian fluid approach, and a potential flow code using on the Rankine source method. The flow has been simulated around the hull at two Froude numbers and comparisons between the results and the experimental results have been made. Two turbulence models (k-ε and Shear Stress Transport) are used in the commercial RANSE code. The computational grid in the commercial code has been used for generating the unstructured tetrahedral and structured hexahedral computational grid required for the RANSE code solver. The potential flow code uses quadrilateral structured patches to mesh both the ship hull surface and the water surface around the hull. In all the simulations, the hull is fixed. The results compare well with the available experimental data. the theoretical prediction of waves around simple bodies, or ship hulls of simplified analytical lines (Wehausen, 1973). The Boundary Element Method (BEM), which is well known as " panel method " is widely used since the works of Hess and Smith (1964) and Dawson (1977) for predicting wave patterns around ships hulls. In this method, the inviscid, irrotational fluid is considered, and with the aid of panel methods for discretization, the flow is computed by solving the Laplace equation. Triangular or quadrilateral panels are used for approximating the surface of the ship. The Rankine source method (Gatchell et al., 2001; Jensen & Soding, 1986; Larson et al., 1989) is the most widely used technique for ship wave resistance simulation problems. The discretization process in this case is made for both body surface and free water surface. The free surface boundary condition can be incorporated successfully in the simulation process based on a so-called double model solution, which was proposed by Dawson (1977). Since then it has been widely applied as a practical method and many improvements have been made to account for the nonlinearity of the free surface physics. Taylor & Francis Group, London 2015 Article PeerReviewed Ahmed, Y. M. and Ciortan, C. and Wnek, A. D. and Guedes Soares, C. (2015) Free surface flow simulation around a Wigley hull using viscous and potential flow approaches. Maritime Technology and Engineering – Guedes Soares & Santos (Eds) . pp. 985-992.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Ahmed, Y. M.
Ciortan, C.
Wnek, A. D.
Guedes Soares, C.
Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
description The incompressible free surface flow around a Wigley hull form has been simulated using a commercial RANSE code using the two-phase Eulerian-Eulerian fluid approach, and a potential flow code using on the Rankine source method. The flow has been simulated around the hull at two Froude numbers and comparisons between the results and the experimental results have been made. Two turbulence models (k-ε and Shear Stress Transport) are used in the commercial RANSE code. The computational grid in the commercial code has been used for generating the unstructured tetrahedral and structured hexahedral computational grid required for the RANSE code solver. The potential flow code uses quadrilateral structured patches to mesh both the ship hull surface and the water surface around the hull. In all the simulations, the hull is fixed. The results compare well with the available experimental data. the theoretical prediction of waves around simple bodies, or ship hulls of simplified analytical lines (Wehausen, 1973). The Boundary Element Method (BEM), which is well known as " panel method " is widely used since the works of Hess and Smith (1964) and Dawson (1977) for predicting wave patterns around ships hulls. In this method, the inviscid, irrotational fluid is considered, and with the aid of panel methods for discretization, the flow is computed by solving the Laplace equation. Triangular or quadrilateral panels are used for approximating the surface of the ship. The Rankine source method (Gatchell et al., 2001; Jensen & Soding, 1986; Larson et al., 1989) is the most widely used technique for ship wave resistance simulation problems. The discretization process in this case is made for both body surface and free water surface. The free surface boundary condition can be incorporated successfully in the simulation process based on a so-called double model solution, which was proposed by Dawson (1977). Since then it has been widely applied as a practical method and many improvements have been made to account for the nonlinearity of the free surface physics.
format Article
author Ahmed, Y. M.
Ciortan, C.
Wnek, A. D.
Guedes Soares, C.
author_facet Ahmed, Y. M.
Ciortan, C.
Wnek, A. D.
Guedes Soares, C.
author_sort Ahmed, Y. M.
title Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
title_short Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
title_full Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
title_fullStr Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
title_full_unstemmed Free surface flow simulation around a Wigley hull using viscous and potential flow approaches
title_sort free surface flow simulation around a wigley hull using viscous and potential flow approaches
publisher Taylor & Francis Group, London
publishDate 2015
url http://eprints.utm.my/id/eprint/59279/
_version_ 1732945367452876800
score 13.251813

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