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Sun, Zhe, Sui, Xu-peng, Korobkin, A. 
ORCID: https://orcid.org/0000-0003-3605-8450, Zou, Li and Zong, Zhi
(2022)
Slamming force decomposition with gravity effect.
Journal of Fluids and Structures, 114.
ISSN 0889-9746
Abstract
In this paper, the original slamming force decomposition, where the total vertical slamming force is decomposed into speed and acceleration terms with coefficients depending on the penetration depth only, is further developed by including the gravity effect through an additional term that is only dependent on the penetration depth as well. The speed, acceleration and gravity related coefficients are extracted by Computational Fluid Dynamics (CFD) approach, where gravity can be readily included or excluded, using only small number of CFD computations for particular body motions. Then the components of the hydrodynamic force acting on the entering body can be evaluated using these coefficients and the force decomposition formula for any motion of the body avoiding direct CFD computations for each particular motion. CFD results show that the gravity significantly affects the slamming force for relatively small values of the entry speed. It is shown that the improved force decomposition provides an accurate approximation of the computed forces under various speed/acceleration combinations for arbitrary two-dimensional body shapes including vertical entry of symmetric/asymmetric bodies and oblique entry of symmetric bodies, except for penetrations with large deceleration when the body stops shortly after the flow separation.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Zhe sun reports financial support was provided by Ministry of Science and Technology of the People’s Republic of China. Zhe sun reports financial support was provided by National Natural Science Foundation of China. Zhe sun reports financial support was provided by State Key laboratory of Deep Sea Mineral Resources Development and Utilization Technology. Zhe sun reports financial support was provided by Dalian Municipal Government. Funding Information: This work is supported by the National Key Research and Development Program of China ( 2021YFC2801701 & 2021YFC2801700 ), National Natural Science Foundation of China (No. 52171295 ), Open Project of State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology, China (Grant No. SH-2020-KF-A01 ), Young Scholar Supporting Project of Dalian City, China (Grant No. 2020RQ006 ), Fundamental Research Funds for the Central Universities, China (No. DUT22LK17 , DUT2017TB05 ), to which the authors are most grateful. Publisher Copyright: © 2022 Elsevier Ltd |
| Uncontrolled Keywords: | computational fluid dynamics,gravity,slamming force decomposition,mechanical engineering ,/dk/atira/pure/subjectarea/asjc/2200/2210 |
| Faculty \ School: | Faculty of Science > School of Mathematics |
| UEA Research Groups: | Faculty of Science > Research Groups > Fluid and Solid Mechanics |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 04 Mar 2024 18:35 |
| Last Modified: | 04 Mar 2024 18:35 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/94515 |
| DOI: | 10.1016/j.jfluidstructs.2022.103694 |
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