A particle-element contact algorithm incorporated into the coupling methods of FEM-ISPH and FEM-WCSPH for FSI problems.pdfVIP

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A particle-element contact algorithm incorporated into the coupling methods of FEM-ISPH and FEM-WCSPH for FSI problems.pdf

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A particle-element contact algorithm incorporated into the coupling methods of FEM-ISPH and FEM-WCSPH for FSI problems.pdf

Ocean Engineering 123 (2016) 154–163 Contents lists available at ScienceDirect Ocean Engineering journal homepage: /locate/oceaneng A particle-element contact algorithm incorporated into the coupling methods of FEM-ISPH and FEM-WCSPH for FSI problems Ting Long, Dean Hu n, Gang Yang, Detao Wan State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China article info Article history: Received 9 April 2015 Received in revised form 6 April 2016 Accepted 27 June 2016 Available online 21 July 2016 Keywords: Contact algorithm Coupling method Linear momentum Angular momentum FSI problems abstract Numerical simulation of FSI problems is one of the most important topics in computational ?uid dynamics. In this paper, a particle-element contact algorithm is incorporated into coupling methods of FEM-ISPH and FEM-WCSPH for solving FSI problems. The objective of contact algorithm is to adjust positions and normal velocities of slave particles and master nodes by conservation of linear momentum and angular momentum. Compared with particle–particle contact algorithm, which is based on contact force of Monaghan boundary condition, the calculation of contact force is not required in the present contact algorithm. Moreover, correction algorithms of Yildiz et al. are used for both WCSPH and ISPH to treat noises in ?uid ?eld and improve the accuracy of numerical simulations. Numerical examples investigate the comparison of particle-element contact algorithm and commonly used particle–particle contact algorithm, and it indicates that the present contact algorithm is effective for FSI problems. 2016 Elsevier Ltd. All rights reserved. 1. Introduction Fluid–Structure Interaction (FSI) is an important problem in computational mechanics. For example, the drive to model nonlinear ?utter response has spawned in computational aeroelastics (Bennet and Edwards, 1998). The response of cardiac, arterial and respiratory systems is crucial in