Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead
The performance of a porous swash bulkhead for the reduction of the resonant liquid motion in a swaying rectangular tank was investigated based on the assumption of linear potential theory. The Galerkin method (Porter and Evans, 1995) was used to solve the potential flow model by adding a viscous fr...
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| Format: | Article |
| Language: | English |
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The Korean Society of Ocean Engineers
2018-08-01
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| Series: | 한국해양공학회지 |
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| Online Access: | https://doi.org/10.26748/KSOE.2018.6.32.4.228 |
| _version_ | 1811281021198401536 |
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| author | Il-Hyoung Cho |
| author_facet | Il-Hyoung Cho |
| author_sort | Il-Hyoung Cho |
| collection | DOAJ |
| description | The performance of a porous swash bulkhead for the reduction of the resonant liquid motion in a swaying rectangular tank was investigated based on the assumption of linear potential theory. The Galerkin method (Porter and Evans, 1995) was used to solve the potential flow model by adding a viscous frictional damping term to the free-surface condition. By comparing the experimental results and the analytical solutions, we verified that the frictional damping coefficient was 0.4. Darcy’s law was used to consider the energy dissipation at a porous bulkhead. The tool that was developed with a built-in frictional damping coefficient of 0.4 was confirmed by small-scale experiments. Using this tool, the free-surface elevation, hydrodynamic force (added mass, damping coefficient) on a wall, and the horizontal load on a bulkhead were assessed for various combinations of porosity and submergence depth. It was found that the vertical porous bulkhead can suppress sloshing motions significantly when properly designed and by selecting the appropriate porosity(≈0.1) and submergence depth. |
| first_indexed | 2024-04-13T01:26:23Z |
| format | Article |
| id | doaj.art-6d9be35bc3894cf795301b1f09464dcd |
| institution | Directory Open Access Journal |
| issn | 1225-0767 2287-6715 |
| language | English |
| last_indexed | 2024-04-13T01:26:23Z |
| publishDate | 2018-08-01 |
| publisher | The Korean Society of Ocean Engineers |
| record_format | Article |
| series | 한국해양공학회지 |
| spelling | doaj.art-6d9be35bc3894cf795301b1f09464dcd2022-12-22T03:08:37ZengThe Korean Society of Ocean Engineers한국해양공학회지1225-07672287-67152018-08-01324228236https://doi.org/10.26748/KSOE.2018.6.32.4.228Sloshing Damping in a Swaying Rectangular Tank Using a Porous BulkheadIl-Hyoung Cho0Jeju National UniversityThe performance of a porous swash bulkhead for the reduction of the resonant liquid motion in a swaying rectangular tank was investigated based on the assumption of linear potential theory. The Galerkin method (Porter and Evans, 1995) was used to solve the potential flow model by adding a viscous frictional damping term to the free-surface condition. By comparing the experimental results and the analytical solutions, we verified that the frictional damping coefficient was 0.4. Darcy’s law was used to consider the energy dissipation at a porous bulkhead. The tool that was developed with a built-in frictional damping coefficient of 0.4 was confirmed by small-scale experiments. Using this tool, the free-surface elevation, hydrodynamic force (added mass, damping coefficient) on a wall, and the horizontal load on a bulkhead were assessed for various combinations of porosity and submergence depth. It was found that the vertical porous bulkhead can suppress sloshing motions significantly when properly designed and by selecting the appropriate porosity(≈0.1) and submergence depth.https://doi.org/10.26748/KSOE.2018.6.32.4.228Porous bulkheadEnergy dissipationPorosity coefficientModel testSloshingResonant frequency |
| spellingShingle | Il-Hyoung Cho Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead 한국해양공학회지 Porous bulkhead Energy dissipation Porosity coefficient Model test Sloshing Resonant frequency |
| title | Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead |
| title_full | Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead |
| title_fullStr | Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead |
| title_full_unstemmed | Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead |
| title_short | Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead |
| title_sort | sloshing damping in a swaying rectangular tank using a porous bulkhead |
| topic | Porous bulkhead Energy dissipation Porosity coefficient Model test Sloshing Resonant frequency |
| url | https://doi.org/10.26748/KSOE.2018.6.32.4.228 |
| work_keys_str_mv | AT ilhyoungcho sloshingdampinginaswayingrectangulartankusingaporousbulkhead |