Effects of fixed and dynamic mesh methods on simulation of stepped planing craft
In the present study, we investigate the effects of fixed and dynamic mesh methods on CFD simulation of stepped planing craft. To this accomplishment, three different body forms of without step, one step, and two step Cougar planing crafts are considered. Three-dimensional CFD analysis is conducted...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-03-01
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| Series: | Journal of Ocean Engineering and Science |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468013318301700 |
| _version_ | 1811317278905466880 |
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| author | M. Mehdi Doustdar Hamid Kazemi |
| author_facet | M. Mehdi Doustdar Hamid Kazemi |
| author_sort | M. Mehdi Doustdar |
| collection | DOAJ |
| description | In the present study, we investigate the effects of fixed and dynamic mesh methods on CFD simulation of stepped planing craft. To this accomplishment, three different body forms of without step, one step, and two step Cougar planing crafts are considered. Three-dimensional CFD analysis is conducted using finite volume method (FVM). Volume of fluid (VOF) model is used for free surface modeling. Overset mesh technique (dynamic mesh) and fixed mesh method are conducted by STAR CCM and ANSYS CFX CFD toolboxes, respectively. CFD results of total hydrodynamic resistance and dynamic trim angle are compared against our measured experimental data to assess the performance and accuracy of considered mesh methods. For more details, pressure distributions, wave patterns and streamlines around the hull models are also presented. Based on our CFD results, dynamic mesh method is more accurate and precise to simulate the stepped planing crafts compared to fixed mesh method. However, computational cost for dynamic mesh method is significantly greater than the fixed mesh method. We also found that the porpoising phenomenon is only detectable using dynamic mesh method in simulation of stepped Cougar planing craft. Keywords: CFD, Dynamic mesh method, Fixed mesh method, Stepped planing craft |
| first_indexed | 2024-04-13T12:05:08Z |
| format | Article |
| id | doaj.art-9a89b99e4f10408985b1b622436e795a |
| institution | Directory Open Access Journal |
| issn | 2468-0133 |
| language | English |
| last_indexed | 2024-04-13T12:05:08Z |
| publishDate | 2019-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Ocean Engineering and Science |
| spelling | doaj.art-9a89b99e4f10408985b1b622436e795a2022-12-22T02:47:40ZengElsevierJournal of Ocean Engineering and Science2468-01332019-03-01413348Effects of fixed and dynamic mesh methods on simulation of stepped planing craftM. Mehdi Doustdar0Hamid Kazemi1Corresponding author.; Department of Mechanical Engineering, Imam Hossein University, Tehran, IranDepartment of Mechanical Engineering, Imam Hossein University, Tehran, IranIn the present study, we investigate the effects of fixed and dynamic mesh methods on CFD simulation of stepped planing craft. To this accomplishment, three different body forms of without step, one step, and two step Cougar planing crafts are considered. Three-dimensional CFD analysis is conducted using finite volume method (FVM). Volume of fluid (VOF) model is used for free surface modeling. Overset mesh technique (dynamic mesh) and fixed mesh method are conducted by STAR CCM and ANSYS CFX CFD toolboxes, respectively. CFD results of total hydrodynamic resistance and dynamic trim angle are compared against our measured experimental data to assess the performance and accuracy of considered mesh methods. For more details, pressure distributions, wave patterns and streamlines around the hull models are also presented. Based on our CFD results, dynamic mesh method is more accurate and precise to simulate the stepped planing crafts compared to fixed mesh method. However, computational cost for dynamic mesh method is significantly greater than the fixed mesh method. We also found that the porpoising phenomenon is only detectable using dynamic mesh method in simulation of stepped Cougar planing craft. Keywords: CFD, Dynamic mesh method, Fixed mesh method, Stepped planing crafthttp://www.sciencedirect.com/science/article/pii/S2468013318301700 |
| spellingShingle | M. Mehdi Doustdar Hamid Kazemi Effects of fixed and dynamic mesh methods on simulation of stepped planing craft Journal of Ocean Engineering and Science |
| title | Effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| title_full | Effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| title_fullStr | Effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| title_full_unstemmed | Effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| title_short | Effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| title_sort | effects of fixed and dynamic mesh methods on simulation of stepped planing craft |
| url | http://www.sciencedirect.com/science/article/pii/S2468013318301700 |
| work_keys_str_mv | AT mmehdidoustdar effectsoffixedanddynamicmeshmethodsonsimulationofsteppedplaningcraft AT hamidkazemi effectsoffixedanddynamicmeshmethodsonsimulationofsteppedplaningcraft |