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A numerical analysis of dynamic slosh dampening utilising perforated partitions in partially-filled rectangular tanks

A numerical analysis of dynamic slosh dampening utilising perforated partitions in partially-filled rectangular tanks
A numerical analysis of dynamic slosh dampening utilising perforated partitions in partially-filled rectangular tanks
Conventional liquefied natural gas (LNG) cargo vessels are imposed with tank-fill limitations as precautions to prevent structural damage and stability-loss due to high-impact sloshing, enforcing cargo volume-fills to be lower than 10% or higher than 70% of the tank height. The restrictions, however, limit commercial operations, specifically when handling spot trades and offshore loading/unloading at multiple ports along a shipping route. The study puts forward a computational fluid dynamic (CFD) sloshing analysis of partially-filled chamfered rectangular tanks undergoing sinusoidal oscillatory kinetics with the use of the explicit volume-of-fluid and non-iterative time-advancement schemes. Establishing a 20% to 60% fill-range, the sloshing dynamics were acknowledged within an open-bore, partitioned, and perforated-partitioned tank when oscillating at frequencies of 0.5 Hz and 1 Hz. The overall torque and static pressure induced on the tank walls were investigated. High-impact slamming at the tank roof occurred at 40% and 60% fills, however, the implementation of the partition and perforated-partition barriers successfully reduced the impact due to suppression and dissipation of the wave dynamics.
CFD, NITA, Pendulum oscillation, Rectangular tank, Sloshing, VOF
Borg, Mitchell G.
4082cde8-bedf-4a43-a65d-8818a93698f8
Muscat-Fenech, Claire DeMarco
08254251-e8bf-48bc-ab2e-95610eed94dd
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Sant, Tonio
b0b68ffd-6d1d-4d17-8ca7-c3b58c9f26bb
Mizzi, Simon
1deca98f-ad1b-4409-a961-47b8debdf91a
Demirel, Yigit Kemal
44a59a7c-8ba9-481d-be96-d50c46fbdf34
Borg, Mitchell G.
4082cde8-bedf-4a43-a65d-8818a93698f8
Muscat-Fenech, Claire DeMarco
08254251-e8bf-48bc-ab2e-95610eed94dd
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Sant, Tonio
b0b68ffd-6d1d-4d17-8ca7-c3b58c9f26bb
Mizzi, Simon
1deca98f-ad1b-4409-a961-47b8debdf91a
Demirel, Yigit Kemal
44a59a7c-8ba9-481d-be96-d50c46fbdf34

Borg, Mitchell G., Muscat-Fenech, Claire DeMarco, Tezdogan, Tahsin, Sant, Tonio, Mizzi, Simon and Demirel, Yigit Kemal (2022) A numerical analysis of dynamic slosh dampening utilising perforated partitions in partially-filled rectangular tanks. Journal of Marine Science and Engineering, 10 (2), [254]. (doi:10.3390/jmse10020254).

Record type: Article

Abstract

Conventional liquefied natural gas (LNG) cargo vessels are imposed with tank-fill limitations as precautions to prevent structural damage and stability-loss due to high-impact sloshing, enforcing cargo volume-fills to be lower than 10% or higher than 70% of the tank height. The restrictions, however, limit commercial operations, specifically when handling spot trades and offshore loading/unloading at multiple ports along a shipping route. The study puts forward a computational fluid dynamic (CFD) sloshing analysis of partially-filled chamfered rectangular tanks undergoing sinusoidal oscillatory kinetics with the use of the explicit volume-of-fluid and non-iterative time-advancement schemes. Establishing a 20% to 60% fill-range, the sloshing dynamics were acknowledged within an open-bore, partitioned, and perforated-partitioned tank when oscillating at frequencies of 0.5 Hz and 1 Hz. The overall torque and static pressure induced on the tank walls were investigated. High-impact slamming at the tank roof occurred at 40% and 60% fills, however, the implementation of the partition and perforated-partition barriers successfully reduced the impact due to suppression and dissipation of the wave dynamics.

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Accepted/In Press date: 10 February 2022
Published date: 13 February 2022
Additional Information: Funding Information: Funding: The research was funded by Malta Marittima and Transport Malta via the ‘DeSloSH’ project supported through the Maritime Seed Award 2020. The APC was funded as part of the European Union’s Horizon 2020 research and innovation programme, VENTuRE (project no. 856887). Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords: CFD, NITA, Pendulum oscillation, Rectangular tank, Sloshing, VOF

Identifiers

Local EPrints ID: 473875
URI: http://eprints.soton.ac.uk/id/eprint/473875
PURE UUID: fc5ea748-7e5d-4c38-9878-16d2d4429824
ORCID for Tahsin Tezdogan: ORCID iD orcid.org/0000-0002-7032-3038

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Date deposited: 02 Feb 2023 17:35
Last modified: 17 Mar 2024 04:18

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Contributors

Author: Mitchell G. Borg
Author: Claire DeMarco Muscat-Fenech
Author: Tahsin Tezdogan ORCID iD
Author: Tonio Sant
Author: Simon Mizzi
Author: Yigit Kemal Demirel

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