Two-phase free-surface flow interaction with moving bodies using a consistent, momentum preserving method

Eijk, Martin van; Wellens, Peter

doi:10.1016/j.jcp.2022.111796

Cited by 7 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grid convergence states that the simulation solution converges to the 'true' simulation solution as the grid is refined. CFD simulations reported by for instance Eijk and Wellens [40] show the clear presence of grid convergence. Therefore, this work explores a novel hierarchical multi-fidelity mapping method exploiting this grid convergence information to relieve the effects of the curse of dimensionality at the expensive high fidelity.…”

Section: Motivationmentioning

confidence: 90%

“…Realistic test scenarios where the data is acquired by means of CFD simulations using the CFD solver described in Eijk and Wellens [40]. The design problem will consist of only two actively controlled variables.…”

Section: Design Simulation Setupmentioning

confidence: 99%

“…The in-house CFD solver that has been used is called EVA [40][41][42] and developed with a focus on extreme fluid-structure interaction (FSI). EVA is a multiphase flow solver based on the 2D Navier-Stokes equations for the motion of a mixed fluid.…”

Section: Case Descriptionmentioning

confidence: 99%

“…Note that when waves are concerned, simulations benefit from Generating Absorbing Boundary Conditions [5,6], both in terms of accuracy and of computing time. Slamming of an object onto a free water surface constitutes another type of impact simulation, demonstrated by means of a falling cylinder on water in van der Eijk and Wellens [40].…”

Section: Case Descriptionmentioning

confidence: 99%

“…After the rescue vessel slams the water, constituting the moment with the highest vertical accelerations, flow separation and the generation of a cavity follows. EVA [40] has been validated for the whole entry procedure.…”

Section: Case Descriptionmentioning

confidence: 99%

See 4 more Smart Citations

Multi-fidelity Kriging extrapolation together with CFD for the design of the cross-section of a falling lifeboat

Wenink,

van der Eijk,

Yorke-Smith

et al. 2023

ISP

Self Cite

View full text Add to dashboard Cite

Surrogate modelling techniques such as Kriging are a popular means for cheaply emulating the response of expensive Computational Fluid Dynamics (CFD) simulations. These surrogate models are often used for exploring a parameterised design space and identifying optimal designs. Multi-fidelity Kriging extends the methodology to incorporate data of variable accuracy and costs to create a more effective surrogate. This work recognises that the grid convergence property of CFD solvers is currently an unused source of information and presents a novel method that, by leveraging the data structure implied by grid convergence, could further improve the performance of the surrogate model and the corresponding optimisation process. Grid convergence states that the simulation solution converges to the true simulation solution as the numerical grid is refined. The proposed method is tested with realistic multi-fidelity data acquired with CFD simulations. The performance of the surrogate model is comparable to an existing method, and likely more robust. More research is needed to explore the full potential of the proposed method. Code has been made available online at https://github.com/robertwenink/MFK-Extrapolation.

show abstract

Section: Motivationmentioning

confidence: 90%

Section: Design Simulation Setupmentioning

confidence: 99%