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An Improved Passive Wave Absorption Technique for FNPT-NS Solver

机译:用于FNPT-NS求解器的改进的被动波吸收技术

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The paper presents an improved passive wave absorber for numericallymodelling extremely wave. The development is driven by the challengeon effectively absorbing the undesirable wave, especially the waves withlarge wavelength, in the numerical wave tanks (NWTs). The developedabsorber is adopted by the hybrid model, qaleFOAM, which combines atwo-phase Navier-Stokes model (NS) and the fully nonlinear potentialtheory (FNPT) using the spatially hierarchical approach. The formergoverns a limited computational domain, where the viscous effects aresignificant, and is solved by using OpenFOAM/InterDyMFoam. Thelatter covers the rest of the domain and solved by using the QuasiLagrangian Eulerian Finite Element Method (QALE-FEM). Theaccuracy of the qaleFOAM with the new self-adaptive technique isdemonstrated by comparing its prediction with experimental results, inwhich extreme focusing waves are considered. The effectiveness of thewave absorber is assessed by comparing with the conventional dampingtechnique.
机译:本文在数值上呈现改进的被动波吸收器建模极其波。发展是受到挑战的推动有效地吸收不良波,尤其是波浪大波长,在数值波坦克(NWT)中。发达国家混合模型,Qalefoam采用吸收器,Qalefoam结合了一个两阶段Navier-Stokes模型(NS)和完全非线性潜力理论(FNPT)使用空间层次方法。前者管理有限的计算领域,其中粘性效果重要的,并通过使用OpenFoam / interdymfoam来解决。这后者涵盖了域的其余部分,并通过使用准Quasi来解决拉格朗日Eulerian有限元方法(QALE-FEM)。这用新的自适应技术的QaleFoam的准确性是通过将其预测与实验结果进行比较来证明考虑了哪个极端聚焦波。的有效性通过与传统阻尼进行比较来评估波吸收器技术。

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