Analysing fluid-structure interaction with CFD and FEA on a marine double-wall LNG piping system

Cambaz, Alihan; Gorgulu, Yasin Furkan; Arat, Halit

doi:10.31217/p.36.1.6

Cited by 3 publications

(4 citation statements)

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“…The ABS Guidance Notes on Thermal Analysis [19] recommend using either analytical models or finite element (FE) models that assume steady-state conditions. Alternatively, Cambaz et al [20] performed a transient heat transfer FE analysis, demonstrating that temperature variations at the same point over two days are less than 1%.…”

Section: Methodsmentioning

confidence: 99%

Comparative FEM Analysis of Vacuum and Perlite Insulation Techniques on the Structural Integrity of Independent Type C Liquefied Natural Gas Tank

Sviličić,

Rudan,

Galić

et al. 2024

JMSE

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In light of escalating global energy demands and the imperative to reduce greenhouse gas emissions, the efficient transportation of liquefied natural gas (LNG) has become increasingly critical. As the evaporation of LNG from storage tanks represents a significant energy loss, improving tank insulation is crucial to optimize storage efficiency. This paper conducts a structural assessment of a smaller-sized Type C independent tank made of AISI 304L steel and examines the impact of two insulation techniques—vacuum and perlite—on their heat, structural, and fatigue behavior. Utilizing the finite element method (FEM), this study performs a heat transfer analysis followed by a structural analysis under combined loads in accordance with the International Gas Carrier (IGC) code. The subsequent fatigue analysis follows IGC procedures and is performed using third-party software. This article presents a detailed analysis of the heat transfer throughout the entire LNG tank and the stress levels under various combined load scenarios while providing insights into the critical stress points and the areas with the lowest fatigue life. Finally, this study confirms the viability of using both novel materials, perlite as an insulation material and Durolight for the tank support, because they meet the required limits.

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Section: Methodsmentioning

confidence: 99%

Comparative FEM Analysis of Vacuum and Perlite Insulation Techniques on the Structural Integrity of Independent Type C Liquefied Natural Gas Tank

Sviličić,

Rudan,

Galić

et al. 2024

JMSE

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“…The average skewness of the generated mesh is 0.2014. Mesh quality in the range of 0 to 0.25 on the scale shared by Ansys is defined as "Excellent" [28][29][30][31][32]. The average orthogonal quality, which is the second quality indicator, is 0.79728.…”

Section: Finite Element Analysis Using Explicit Dynamicsmentioning

confidence: 99%

“…After the start of the cutting process, the end mill cutter rotates to cut the workpiece along its length. The quality scale of these two parameters is given in Tables 1 and 2 [28][29][30][31][32]. The study done can be categorized as groove cutting and side cutting.…”

Section: Finite Element Analysis Using Explicit Dynamicsmentioning

confidence: 99%

Estimating the Strength and Deformation Properties of the End Milling Process Using Numerical Analysis Methods

Gorgulu

Aydın

2023

Sakarya University Journal of Science

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In the study, the end mill made of titanium material and having a unique design with a 4-flute was simulated during the milling of the workpiece with a geometry of a rectangular prism made of aluminum material. Ansys Explicit Dynamics was used in the study. Modeling and simulation of the milling process were made with finite element analysis for the estimation of the strength properties. The end mill is chosen as a titanium alloy, while the milled workpiece is aluminum. All parameters were kept constant and only the depth of cut was examined in three scenarios 3, 6, and 9 mm. The simulations were carried out by taking the spindle speed of 4000 RPM and the feeding rate of 3350 mm/s. One of the conveniences provided by Explicit Dynamics is that it can be solved in very small time intervals, and for this reason, the time step in the analysis is solved by taking 0.001 seconds. While hexahedral mesh is applied to the tool, a tetrahedral mesh is applied to the workpiece. The generated mesh has 8,012 nodes and 17,052 mesh elements. Average deformations for both tool and workpiece are 36.92, 38.10, and 38.29 mm, respectively. Strain also shows a similar trend to the total deformation and the average values for all three scenarios were found to be 2.84 x 10-3, 4.43 x 10-3 and 3.99 x 10-3 mm/mm. Also, the stress values were obtained as 78.23, 76.83, and 77.99 MPa.

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“…In meshing, because of the grid quality and quantity ascertaining computation time and results, a hexahedral grid type was chosen in the prediction of results. The average skewness rate range recommended by Ansys is known to be less than 0.95 [25][26][27]. The mean skewness value for the simulation is 0.23, which is described as "Excellent" for Ansys.…”

Section: Computational Fluid Mechanics (Cfd)mentioning

confidence: 99%

Characteristics of Wind Flow Around a University Campus Settlement Estimated by CFD Simulation

Gorgulu

Hazer

2022

Preprint

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Performing a computational fluid dynamics (CFD) analysis of a settlement can present many parameters such as determining the wind load, predicting the temperature distribution, determining the turbulence formations about how that settlement should be located, to the scientists in the architectural and engineering departments. In this study, a CFD analysis has been done using a commercial analysis program “Ansys Fluent” and the geometry has been created using an architectural program known as “SketchUp”. Istanbul Health and Technology University Merter Campus buildings have been taken as the reference models. Streamlines, velocity, pressure, temperature and turbulence kinetic energy distribution contours have been projected. The highest flow velocities and turbulence density were observed between the campus buildings, and when the temperature distributions were examined, dramatic decreases were found in the building temperatures on the windward facade. The maximum wind loads, temperature distributions and so on have been detected and according to the results, recommendations have been made.

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Analysing fluid-structure interaction with CFD and FEA on a marine double-wall LNG piping system

Cited by 3 publications

References 0 publications

Comparative FEM Analysis of Vacuum and Perlite Insulation Techniques on the Structural Integrity of Independent Type C Liquefied Natural Gas Tank

Comparative FEM Analysis of Vacuum and Perlite Insulation Techniques on the Structural Integrity of Independent Type C Liquefied Natural Gas Tank

Estimating the Strength and Deformation Properties of the End Milling Process Using Numerical Analysis Methods

Characteristics of Wind Flow Around a University Campus Settlement Estimated by CFD Simulation

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