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Khanmoradi N, Moonesun M, Jafari Horestani S. Calculation of Hydrodynamics Resistance Coefficient of Diver by CFD Method at Free Surface Condition. ijmt 2023; 18 :15-24
URL: http://ijmt.ir/article-1-817-en.html
Calculation of Hydrodynamics Resistance Coefficient of Diver by CFD Method at Free Surface Condition
Nima Khanmoradi *1 , Mohammad Moonesun2 , Sara Jafari Horestani3
1- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
2- 2Department of Civil & Architectural Engineering, Shahrood University, Shahrood, Iran.
3- Department of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran.
Abstract:   (3043 Views)
The aim of the present study is calculation of the resistance and resistance coefficient of a diver on the water surface and near surface. The results of this article are useful for designing different types of water scooters. This study uses a computational fluid dynamics methodology by considering the effects of free surface. SST K-ω turbulent model is implemented in the Star-CCM+ application and is applied to the flow around a three-dimensional bare hull of an adult human. Three common swimming positions are considered: a ventral position with the arms extended at the front, a ventral position with the arms placed alongside the trunk and a ventral position with one arm extended at the front and another arm placed alongside the trunk. The flow velocities between 0.5 and 2.25m/s with increasing step of 0.25m/s are considered in the simulations which are typical speed of swimmers. According to the resistance coefficient vs Froude number diagrams, submerged diving with two hands alongside the trunk is produces lower resistance. Also, resistance in near surface swimming is lower than surface swimming in lowest speeds. But in higher speeds, that changes and resistance in surface swimming is lower than the other. The results of this research can be used for designing all types of marine propulsion vehicles, water scooter, and all swimming thrusters.
Keywords: human body, diver resistance, swimmer resistance, CFD, resistance coefficient, free surface simulation
Full-Text [PDF 1858 kb]   (1264 Downloads)    
Type of Study: Research Paper | Subject: Numerical Investigation
Received: 2023/04/8 | Accepted: 2023/06/5
References
1. Khanmoradi, N., Moonesun, M., Jafari, H. S., (Under Revision). Calculation of Hydrodynamics Resistance Coefficient of Diver by CFD Method. Journal of Hydraulic and Water Engineering.
2. Bixler, B., Pease, D., & Fairhurst, F. (2007). The accuracy of computational fluid dynamics analysis of the passive drag of a male swimmer. Sports biomechanics, 6(1), 81-98.
3. Costa, L. C., Ribeiro, J., Marinho, D., Mantha, V., Vilas-Boas, J., Fernandes, R. J., ... & Machado, L. (2011). Comparing computational fluid dynamics and inverse dynamics methodologies to assess passive drag during swimming gliding. In ISBS-Conference Proceedings Archive.
4. Chatard, J. C., Lavoie, J. M., Bourgoin, B., & Lacour, J. R. (1990). The contribution of passive drag as a determinant of swimming performance. International journal of sports medicine, 11(05), 367-372.
5. D'Acquisto, M. A. (1988). Breaststroke economy, skill and performance study of breaststroke mechanics, using a computer based" Velocity. Video" system. Zentrum f. Wissenschaftsinformation, Körperkultur u. Sport.
6. Lyttle, A. D., Blanksby, B. A., Elliott, B. C., & Lloyd, D. G. (1998). The effect of depth and velocity on drag during the streamlined glide. Journal of Swimming Research, 13.
7. Counsilman, J. E. (1955). Forces in swimming two types of crawl stroke. Research Quarterly. American Association for Health, Physical Education and Recreation, 26(2), 127-139.
8. Kolmogorov, S. V., Rumyantseva, O. A., Gordon, B. J., & Cappaert, J. M. (1997). Hydrodynamic characteristics of competitive swimmers of different genders and performance levels. Journal of Applied Biomechanics, 13(1), 88-97.
9. Lyttle, A. D., Blanksby, B. A., Elliott, B. C., & Lloyd, D. G. (2000). Net forces during tethered simulation of underwater streamlined gliding and kicking techniques of the freestyle turn. Journal of Sports Sciences, 18(10), 801-807.
10. Toussaint, H. M., Roos, P. E., & Kolmogorov, S. (2004). The determination of drag in front crawl swimming. Journal of biomechanics, 37(11), 1655-1663.
11. Vilas-Boas, J. P., Costa, L., Fernandes, R. J., Ribeiro, J., Figueiredo, P., Marinho, D., ... & Machado, L. (2010). Determination of the drag coefficient during the first and second gliding positions of the breaststroke underwater stroke. Journal of applied biomechanics, 26(3), 324-331.
12. Zaidi, H., Taiar, R., Fohanno, S., & Polidori, G. (2008). Analysis of the effect of swimmer's head position on swimming performance using computational fluid dynamics. Journal of Biomechanics, 41(6), 1350-1358.
13. Marinho, D. A., Reis, V. M., Alves, F. B., Vilas-Boas, J. P., Machado, L., Silva, A. J., & Rouboa, A. I. (2009). Hydrodynamic drag during gliding in swimming. Journal of Applied Biomechanics, 25(3), 253-257.
14. Mollendorf, J. C., ALBERT C TERMIN, I. I., Oppenheim, E. R. I. C., & Pendergast, D. R. (2004). Effect of swim suit design on passive drag. Medicine & Science in Sports & Exercise, 36(6), 1029-1035.
15. Novais, M., Silva, A., Mantha, V., Ramos, R., Rouboa, A., Vilas-Boas, J., ... & Marinho, D. (2012). The effect of depth on drag during the streamlined glide: A three-dimensional CFD analysis. Journal of human kinetics, 33(2012), 55-62.
16. Liu, Y., Yu, Z., Zhang, L., Liu, T., Feng, D., & Zhang, J. (2021). A fine drag coefficient model for hull shape of underwater vehicles. Ocean Engineering, 236, 109361.
17. Moonesun, M., Ghasemzadeh, F., Korol, Y., Nikrasov, V., Yastreba, A., Ursolov, A., & Mahdian, A. (2016). Technical notes on the near surface experiments of submerged submarine. International Journal of Maritime Technology, 5, 41-54.
18. Moonesun, M., Korol, Y., & Dalayeli, H. (2015). CFD analysis on the bare hull form of submarines for minimizing the resistance. International Journal of Maritime Technology, 3, 1-16.
19. dive-hurghada. (n. d.). PADI Diver Propulsion Vehicle Specialty (Scooter). https://www.dive-hurghada.com/prices/padi-scuba-diving-courses/padi-diver-propulsion-vehicle-specialty
20. finish-tackle. (n. d.). product. https://finish-tackle.com/product/magicjet-scooter/
21. Moreira, A., Rouboa, A., Silva, A. J., Sousa, L., Marinho, D., Alves, F., ... & Machado, L. (2006). Computational analysis of the turbulent flow around a cylinder. Portuguese Journal of Sport Sciences, 6(1), 105.
22. Jiskoot, J., & Clarys, J. P. (1975). Body resistance on and under the water surface. Swimming II, 2, 105-109.
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International Journal of Maritime Technology is licensed under a

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