Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM
In this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain and a symmetrical domain arrangement. The numer...
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2023-03-01
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| Series: | Journal of Applied Fluid Mechanics |
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| Online Access: | https://www.jafmonline.net/article_2198_f0ba50cd6021da497f86f3e36ea63eec.pdf |
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| author | N. V. A. Permadi J. H. Chen E. Sugianto |
| author_facet | N. V. A. Permadi J. H. Chen E. Sugianto |
| author_sort | N. V. A. Permadi |
| collection | DOAJ |
| description | In this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain and a symmetrical domain arrangement. The numerical simulation was carried out using the OpenFOAM software, and the flow was numerically modelled as single-phase and incompressible. The SST k-ω turbulence model was used in both domains, together with an insensitive Spalding wall function to represent the boundary layer near the wall. The results showed that simulations in both the full and symmetrical domains could accurately predict the total resistance. Compared to the symmetrical domain, the resistance value obtained with the full domain was more precise; the symmetrical domain under coarse grid conditions had an error value of 1.34%, whereas the full domain using the same grid size had an error value of 0.6%. Hence, the full domain was superior in terms of predicting the resistance with a coarse grid. Next, the pressure coefficient comparison at the leading edge of the rudder was calculated, where = 0.92, and the symmetric domain was found to have a value of 0.0747 whereas the full domain had a value of 0.236. Compared with the results from experiment (=0.302), the symmetric domain appears to give an underestimate for the pressure distribution at this position. In addition, the flow structures and properties in both domains differ, particularly in terms of the vortical structures generated by the sail and rudders. The simulation results for the full domain reveal that the flow around the SUBOFF model is asymmetric. The full domain was able to capture the flow structures in more detail than the symmetrical domain, and represented the velocity distribution at the propeller plane better. As a result, the full domain must be considered when carrying out propeller analysis and self-propulsion simulations. |
| first_indexed | 2024-04-10T05:48:54Z |
| format | Article |
| id | doaj.art-b384ec471e724812ac83aa9a9cc4a461 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 1735-3645 |
| language | English |
| last_indexed | 2024-04-10T05:48:54Z |
| publishDate | 2023-03-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-b384ec471e724812ac83aa9a9cc4a4612023-03-05T06:16:40ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452023-03-011651017102910.47176/jafm.16.05.15132198Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAMN. V. A. Permadi0J. H. Chen1E. Sugianto2Department of Systems & Naval Mechatronic Engineering, National Cheng Kung University, Tainan, TaiwanDepartment of Systems & Naval Mechatronic Engineering, National Cheng Kung University, Tainan, TaiwanDepartment of Marine Engineering, Hang Tuah University, Surabaya, IndonesiaIn this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain and a symmetrical domain arrangement. The numerical simulation was carried out using the OpenFOAM software, and the flow was numerically modelled as single-phase and incompressible. The SST k-ω turbulence model was used in both domains, together with an insensitive Spalding wall function to represent the boundary layer near the wall. The results showed that simulations in both the full and symmetrical domains could accurately predict the total resistance. Compared to the symmetrical domain, the resistance value obtained with the full domain was more precise; the symmetrical domain under coarse grid conditions had an error value of 1.34%, whereas the full domain using the same grid size had an error value of 0.6%. Hence, the full domain was superior in terms of predicting the resistance with a coarse grid. Next, the pressure coefficient comparison at the leading edge of the rudder was calculated, where = 0.92, and the symmetric domain was found to have a value of 0.0747 whereas the full domain had a value of 0.236. Compared with the results from experiment (=0.302), the symmetric domain appears to give an underestimate for the pressure distribution at this position. In addition, the flow structures and properties in both domains differ, particularly in terms of the vortical structures generated by the sail and rudders. The simulation results for the full domain reveal that the flow around the SUBOFF model is asymmetric. The full domain was able to capture the flow structures in more detail than the symmetrical domain, and represented the velocity distribution at the propeller plane better. As a result, the full domain must be considered when carrying out propeller analysis and self-propulsion simulations.https://www.jafmonline.net/article_2198_f0ba50cd6021da497f86f3e36ea63eec.pdfturbulent flowwall functionvelocity distributionstern wakeflow structuresnumerical accuracyopenfoam |
| spellingShingle | N. V. A. Permadi J. H. Chen E. Sugianto Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM Journal of Applied Fluid Mechanics turbulent flow wall function velocity distribution stern wake flow structures numerical accuracy openfoam |
| title | Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM |
| title_full | Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM |
| title_fullStr | Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM |
| title_full_unstemmed | Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM |
| title_short | Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM |
| title_sort | influence of full and symmetrical domains on the numerical flow around a suboff submarine model using openfoam |
| topic | turbulent flow wall function velocity distribution stern wake flow structures numerical accuracy openfoam |
| url | https://www.jafmonline.net/article_2198_f0ba50cd6021da497f86f3e36ea63eec.pdf |
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