CFD modelling and grid uncertainty analysis of the free-falling water entry of 2D rigid bodies

Wang, Shan; Gadelho, J.F.M.; Islam, Hafizul; Soares, C. Guedes

doi:10.1016/j.apor.2021.102813

Cited by 17 publications

(5 citation statements)

References 49 publications

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“…In parallel, simplified expressions for the maximal force and acceleration have been obtained through fitting the relations between the peak value of the non-dimensional force and the non-dimensional mass. The relationships derived in (Yu et al, 2019) have also been mentioned by other researchers' work (Iafrati and Grizzi, 2019;Iafrati, 2016;Wen et al, 2020;Wang et al, 2021a;Sheng et al, 2022). However, it is worth noting that only fitting functions of force and acceleration were discussed in the previous studies, whereas the detailed theoretical basis with related relationships have not been derived yet.…”

Section: Introductionmentioning

confidence: 80%

On applicability of von Karman's momentum theory in predicting the water entry load of V-shaped structures with varying initial velocity

Lu¹,

Buono²,

Xiao³

et al. 2022

Preprint

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Section: Introductionmentioning

confidence: 80%

On applicability of von Karman's momentum theory in predicting the water entry load of V-shaped structures with varying initial velocity

Lu¹,

Buono²,

Xiao³

et al. 2022

Preprint

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“…A wedge drop was not simulated at this stage, as slamming is a highly complex phenomenon to capture accurately in numerical models. [21][22][23][24] Future iterations of the WEC may be studied using any method of numerical wave generation, and therefore with limited time and computational power, it was decided that the moving wall method was suitable at this early stage in the design process. The model of the WEC and flume is shown in Figure 5.…”

Section: Numerical Modellingmentioning

confidence: 99%

Development of a novel, robust, near-shore, wave energy converter for energy security in remote communities

Nicholls-Lee

2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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This work aimed to test the feasibility, both experimentally and numerically, of a novel concept for a robust Wave Energy Converter (WEC) operating in the near-shore region. The converter uses a series of non-return valves, constrained by a tapered pipe, where the incoming wave builds up pressure in each compartment and finally drives a turbine onshore with the pressurised water. The device is aimed at remote communities, to gain energy security and reduce dependence on imports. The device facilitates local engagement, and it is intended that local people are trained to perform most maintenance tasks using low cost, readily available, parts. This work assessed the feasibility of the WEC through physical testing, the results of which were compared to initial numerical models. The device was shown to capture energy and, through a case study of Ushant Island off the coast of France, was shown to have the potential to become part of the future energy mix for remote communities.

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“…Jun Zhang et al, [21] analyzed the effect of mesh resolution, turbulence model, and near-wall models on erosion prediction and found that they affect accuracy. Shan Wang et al, [22] investigated the number and distribution of mesh and width of the water domain for increasing the accuracy of total slamming force, using open Foam. The mesh size also influences the pressure field in the air-particle flow [23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Mesh Resolution Effect to Numerical Result of CFD-ROM: Turbulent Flow in Stationary Parallel Plate

Candra Damis Widiawaty,

Ahmad Indra Siswantara,

Muhammad Arif Budiyanto

et al. 2024

CFDL

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Computational fluid dynamics (CFD) is extensively utilized to predict flow behaviour in various industries and applications. The Full Order Model (FOM) is a high-accuracy approach to flow modelling, but it requires significant computational resources due to its high order and thousands of variables. To address this problem, the Reduced Order Model (ROM) was developed. Despite the advancement brought by ROM, there is a notable gap in research concerning the impact of mesh configuration on CFD-ROM results. While the number of modes has been extensively studied for its influence on CFD-ROM, the mesh configuration, a critical aspect of the simulation process, has received relatively limited attention. This study investigates the effect of mesh resolution on numerical results in CFD-ROM concerning turbulent flow within stationary parallel plates. Employing rigorous methods, including Richardson Extrapolation, verification, validation, and error percentage. The results explicitly confirm that mesh resolution directly impacts the numerical results of the velocity field in CFD-ROM. It is found that there is a notable reduction in Convergence Grid Index (CGI) values for different mesh ratios: 6.401% for medium-to-coarse and 2.031% for fine-to-medium ratio. Thus, with the same mode number, mesh resolution selection can enhance the numerical result of the velocity field in CFD-ROM.

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CFD modelling and grid uncertainty analysis of the free-falling water entry of 2D rigid bodies

Cited by 17 publications

References 49 publications

On applicability of von Karman's momentum theory in predicting the water entry load of V-shaped structures with varying initial velocity

On applicability of von Karman's momentum theory in predicting the water entry load of V-shaped structures with varying initial velocity

Development of a novel, robust, near-shore, wave energy converter for energy security in remote communities

Analysis of Mesh Resolution Effect to Numerical Result of CFD-ROM: Turbulent Flow in Stationary Parallel Plate

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