Prediction of wave pattern and wave resistance of surface piercing bodies by a boundary element method

Bal, Şakir

doi:10.1002/fld.1527

Cited by 42 publications

(6 citation statements)

References 30 publications

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“…The method was first presented by Dawson (1977) and since then it has been widely applied as a practical method to predict wave resistance. Many improvements have also been made to account for non-linear effects; see e.g., Nakos & Sclavounos (1990), Raven (1996), Bertram (2000), Bal (2008). Considerable efforts have been devoted to increase efficiency and accuracy by introducing several variations, such as the desingularized method and the RAPID method.…”

Section: Introductionmentioning

confidence: 99%

A BEM-isogeometric method for the ship wave-resistance problem

et al. 2013

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In the present work IsoGeometric Analysis is applied to the solution of the Boundary Integral Equation associated with the Neumann-Kelvin problem and the calculation of the wave resistance of ships. As opposed to low-order panel methods, where the body is represented by a large number of quadrilateral panels and the velocity potential is assumed to be piecewise constant (or approximated by low degree polynomials) on each panel, the isogeometric concept is based on exploiting the same NURBS basis, used for representing exactly the body geometry, for approximating the singularity distribution (and, in

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Section: Introductionmentioning

confidence: 99%

A BEM-isogeometric method for the ship wave-resistance problem

et al. 2013

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“…The wave parameters are related to the wind speed, fetch, and water depth at the bank slope. However, the relationship is not a simple function and must be corrected using actual monitoring data [23,24]. By comparing the predicted and measured waves, some improvements in wave prediction methods have been proposed, and the nonbreaking or breaking wave run-up was determined more accurately for ocean areas [25,26].…”

Section: Introductionmentioning

confidence: 99%

Influence of Wind-Generated Wave Action on Mountain Reservoir Bank Collapse: A Case Study at the Lancang River, Western China

2022

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Slopes facing reservoir water often collapse, affecting reservoir capacity. It is important to understand the factors affecting such collapses and predict the locations of collapse after impoundment for practical purposes. However, the mechanism of bank collapse in mountainous areas after reservoir impoundment remains unclear. To address this issue, field geotechnical property surveys, laboratory tests, and numerical simulations were employed to evaluate bank collapse susceptibility. The results showed that (i) bank collapse mainly occurs in slopes with a small cohesion and internal friction angle of less than 30°; (ii) the main effects of wave action on bank collapse are scour, erosion, and cyclic impact on the bank slope: wave erosion occurs in the bank slope with a wave height of less than 1.0 m, cohesion of less than 90 kPa, and slope angle of less than 30°, and wave impaction mainly occurs at the area with a wave height of more than 2.0 m and a slope angle of more than 30°; (iii) for valley reservoirs, softening of water on the slope rock and soil mainly reduces cohesion, which commonly occurs within 30 days; the cyclic action of wave impact load mainly damages the structure and reduces the internal friction angle. The influence of waves on bank collapse is mainly related to the wave height and wave velocity. The antiwave impact broken energy of rock and soil is an important index to evaluate whether bank collapse occurs in the long term, which is related to the strength, structure, and impact resistance. The present research is helpful to better understand the mechanism and evolution process of reservoir bank collapse.

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“…An IBEM [iterative boundary element (panel) method] for the solution of hydrofoil transfering under a free surface was explained in detail in Bal and Kinnas [21]. Their iterative method is extended to apply to the surface piercing bodies and some numerical results of the method are given in Bal [22], Bal [23].…”

Section: Introductionmentioning

confidence: 99%

2D and 3D Potential Flow Simulation around NACA 0012 Airfoil with Ground Eﬀect

Ozdemir

Barlas

2021

Preprint

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The purpose of this paper is to develop a Boundary Element Based Method (BEM) for determining the steady potential about two and three dimensional airfoil. The numerical investigation of NACA 0012 airfoil with using Boundary Element Method is utilized. Two different physical problems of the NACA 0012 airfoil are examined: potential flow around airfoil in an unbounded fluid and potential flow prediction with ground effect. Computation of potential flow around the airfoil is investigated by the mixed constant strength source and constant strength dipole based panel method. Boundary Element Code is written in FORTRAN. To check the accuracy of the 2D boundary element based code, the validation studies are carried out by comparing the present results obtained for the NACA 0012 airfoil from the XFoil and other published simulation results. 3D results are also evaluating with the available experimental and other numerical simulation results. The numerical outcomes are examined in terms of pressure distribution and lifting force on the foil.

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Prediction of wave pattern and wave resistance of surface piercing bodies by a boundary element method

Cited by 42 publications

References 30 publications

A BEM-isogeometric method for the ship wave-resistance problem

A BEM-isogeometric method for the ship wave-resistance problem

Influence of Wind-Generated Wave Action on Mountain Reservoir Bank Collapse: A Case Study at the Lancang River, Western China

2D and 3D Potential Flow Simulation around NACA 0012 Airfoil with Ground Eﬀect

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