Topic
Added mass
About: Added mass is a research topic. Over the lifetime, 2849 publications have been published within this topic receiving 47899 citations.
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TL;DR: In this article, a mixed numerical model is developed to simulate wave motion in rubble-mound structures, where the mixed model utilizes a combined finite difference method of characteristics scheme to integrate the unsteady continuity and momentum equations in the x-t plane to obtain the internal water levels while the two-dimensional properties of the flow are found from a finite element solution for the internal flow domain, x-y plane, at any time t. The model is applied to the Sines breakwater in order to check the dynamic stability of the seaward slope under severe wave attack.
Abstract: A mixed numerical model is developed to simulate wave motion in rubble‐mound structures. The mixed model utilizes a combined finite difference method of characteristics scheme to integrate the unsteady continuity and momentum equations in the x-t plane to obtain the internal water levels while the two‐dimensional properties of the flow are found from a finite element solution for the internal flow domain, x-y plane, at any time t. The two‐dimensional solution is used to update pressure distribution coefficient and hydraulic conductivity values in the x-t plane. The model is applied to the Sines breakwater in order to check the dynamic stability of the seaward slope under severe wave attack. The predicted values for the internal water surface are found to be in fair agreement with a physical model measurement. Furthermore, the model indicates a lower factor of safety than the traditional analysis. Special provisions are included in the model to account for added mass and to detect and correct for internal ...
13 citations
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TL;DR: In this paper, the drag and added mass coefficients of a flexible pipe undergoing vortex-induced vibration (VIV) in an oscillatory flow are investigated experimentally with maximum reduced velocities ranging from 4 to 7.9 and Keulegan-Carpenter (KC) numbers ranging from 10 to 178.
13 citations
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TL;DR: In this paper, a comprehensive and complete model is introduced for describing bubble motion in a point-particle approximation including bubble dynamics (eccentricity) and therefore using composite formulations especially for drag and transverse lift, and in addition accounting for added mass with bubble deformation and wall effects as well as the Basset force.
13 citations
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TL;DR: In this article, the hydrodynamic force due to heaving radiation motion is presented in terms of the added mass and damping coefficients for a polynomial cap and for a rough disc, modelled by a superposition of sinusoidal surfaces defined by randomly generated parameters.
13 citations
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TL;DR: In this article, a set of two-dimensional analytical solutions considering the effects of diffraction and radiation are presented to investigate the hydrodynamic interaction between an incident linear wave and a proposed floating breakwater system consisting of a rectangular-shaped body and two attached vertical side porous walls in an infinite fluid domain with finite water depth.
Abstract: A set of two-dimensional analytical solutions considering the effects of diffraction and radiation are presented in this study to investigate the hydrodynamic interaction between an incident linear wave and a proposed floating breakwater system consisting of a rectangular-shaped body and two attached vertical side porous walls in an infinite fluid domain with finite water depth. The Matched Eigenfunction Expansion Method (MEEM) for multiple fluid domains is applied to derive theoretically the velocity potentials and associated unknown coefficients for wave diffraction and body motion induced radiation in each subdomain. Also, the exciting forces, as well as the added mass and damping coefficients for the floating breakwater system under the surge, heave, and pitching motions, are formulated. The displacements of breakwater motions are determined by solving the equation of motion. As a verification of the analytical model, the present solutions of the limiting cases in terms of exciting forces, moments, added masses, and damping coefficients are found to be well matched with other published numerical results. Additionally, the hydrodynamic performances and the dynamic responses in terms of Response Amplitude Operators (RAOs) of the proposed floating breakwater system are evaluated versus various dimensionless variables, such as wavelength and porous-effect parameter. The results show that the attached porous walls with selected porous properties are observed to have the advantages of reducing wave impacts on the floating breakwater system and at the same time its dynamic responses are also noticeably improved.
13 citations