DYNAMICS OF OSCILLATING TURBULENT FLOW OVER COASTAL BUILDINGS IN PORTS USING AI TECHNIQUES
Abstract
Time-dependent CFD models were used to simulate the flow structures over a square cylinder in oscillating flow. Two-dimensional models were used to study the hydrodynamic forces under sinusoidal flow boundary conditions that were predicted by machine learning algorithms. The study also examines the specifications of the caused entropy around a square cylinder under various conditions, as well as the examination of the second law. It is found that the flow structures and forces values were sensitive to any change in input flow parameter and rotation angle. Furthermore, it is found that the angle 10 degree of rotation object, gives best result for entropy generation in this work.
Keywords
Full Text:
PDFReferences
T. Sarpkaya, "Force on a circular cylinder in viscous oscillatory flow at low Keulegan—Carpenter numbers," Journal of Fluid Mechanics, vol. 165, pp. 61-71, 1986, doi:
1017/S0022112086002999.
E. D. Obasaju, P. W. Bearman, and J. M. R. Graham, "A study of forces, circulation and vortex patterns around a circular cylinder in oscillating flow," Journal of Fluid Mechanics, vol. 196, pp. 467-494, 1988, doi: 10.1017/S0022112088002782.
C. H. K. Williamson, "Sinusoidal flow relative to circular cylinders," Journal of Fluid Mechanics, vol. 155, pp. 141-174, 1985, doi: 10.1017/S0022112085001756.
T. Chi Chao and N. E. Huang, "Combined effects of current and waves on fluid force," Ocean Engineering, vol. 2, no. 4, pp. 183-193, 1973/06/01/ 1973, doi: https://doi.org/10.1016/00298018(73)90004-8.
T. Nomura, Y. Suzuki, M. Uemura, and N. Kobayashi, "Aerodynamic forces on a square cylinder in oscillating flow with mean velocity," Journal of Wind Engineering and Industrial Aerodynamics, vol. 91, no. 1, pp. 199-208, 2003/01/01/ 2003, doi: https://doi.org/10.1016/S01676105(02)00345-8.
D. Yeo and N. P. Jones, "Aerodynamic forces induced by vertically oscillating incoming flow on a yawed horizontal circular cylinder," Journal of Wind Engineering and Industrial Aerodynamics, vol. 104-106, pp. 188-195, 2012/05/01/ 2012, doi: https://doi.org/10.1016/j.jweia.2012.02.032.
L. Shen and E.-S. Chan, "Numerical simulation of oscillating flows over a bed-mounted circular cylinder," Applied Ocean Research, vol. 32, no. 2, pp. 233-241, 2010/04/01/ 2010, doi: https://doi.org/10.1016/j.apor.2009.11.001.
A. K. Saha, "Unsteady flow past a finite square cylinder mounted on a wall at low Reynolds number," Computers & Fluids, vol. 88, pp. 599-615, 2013/12/15/ 2013, doi: https://doi.org/10.1016/j.compfluid.2013.10.010.
A. Okajima, T. Matsumoto, and S. Kimura, "Force Measurements and Flow Visualization of Circular and Square Cylinders in Oscillatory Flow," JSME International Journal Series B, vol. 41, no. 4, pp. 796-805, 1998, doi: 10.1299/jsmeb.41.796.
T. S. Sarpkaya, "Forces on Cylinders Near a Plane Boundary in a Sinusoidally Oscillating Fluid," Journal of Fluids Engineering-transactions of The Asme, vol. 98, pp. 499-503, 1976.
T. Sarpkaya, "In - Line And Transverse Forces, On Cylinders In Oscillatory Flow At High Reynolds Numbers," presented at the Offshore Technology Conference, 1976. [Online]. Available: https://doi.org/10.4043/2533-MS.
T. Sarpkaya and F. Rajabi, "Hydrodynamic Drag On Bottom-Mounted Smooth And Rough Cylinders In Periodic Flow," presented at the Offshore Technology Conference, 1980. [Online]. Available: https://doi.org/10.4043/3761-MS.
Y. Liu, R. M. C. So, and Z. X. Cui, "A finite cantilevered cylinder in a cross-flow," Journal of Fluids and Structures, vol. 20, no. 4, pp. 589-609, 2005/05/01/ 2005, doi: https://doi.org/10.1016/j.jfluidstructs.2005.02.009.
D. Farivar, "Turbulent uniform flow around cylinders of finite length," AIAA Journal, vol. 19, no. 3, pp. 275-281, 1981/03/01 1981, doi: 10.2514/3.7771.
B. E. Launder and D. B. Spalding, "The numerical computation of turbulent flows," Computer Methods in Applied Mechanics and Engineering, vol. 3, no. 2, pp. 269-289, 1974/03/01/ 1974, doi: https://doi.org/10.1016/0045-7825(74)90029-2.
D. Wilcox, Turbulence Modeling for CFD (Third Edition) (Hardcover). 2006.
C. Hirsch, "Numerical Computation of Internal and External Flows: The Fundamentals of Computational Fluid Dynamics," Numerical Computation of Internal and External Flows: The Fundamentals of Computational Fluid Dynamics, 01/01 2007, doi: 10.1016/B978-0-75066594-0.X5037-1.
A. Bejan, "Entropy generation minimization: The new thermodynamics of finite‐size devices and finite‐time processes," Journal of Applied Physics, vol. 79, no. 3, pp. 1191-1218, 1996, doi: 10.1063/1.362674.
C. Iandoli and S. Enrico, "3-D Numerical Calculation of the Local Entropy Generation Rates in a Radial Compressor Stage," International Journal of Thermodynamics, vol. 8, 06/01 2005, doi:
5541/ijot.148.
R. E. Sheldahl and P. C. Klimas, "Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines," United States, 01 1981. [Online]. Available: https://www.osti.gov/biblio/6548367 https://www.osti.gov/servlets/purl/6548367
C. A. d. Moura and C. S. Kubrusly, The Courant-Friedrichs-Lewy (CFL) Condition: 80 Years After Its Discovery. Birkhäuser Basel, 2012.
A. Okajima, T. Matsumoto, and A. Kondo, "Force Measurements of Two Circular Cylinders in Oscillatory Flow," The proceedings of the JSME annual meeting, vol. 2000.1, pp. 897-898, 07/31 2000, doi: 10.1299/jsmemecjo.2000.1.0_897.
M. P. Norton, "Flow-induced vibration: 2nd edition, R.D. Blevins, Van Nostrand Reinhold, New York, 1990, 451 pages, $59.95," Experimental Thermal and Fluid Science, vol. 4, no. 1, pp. 135136, 1991/01/01/ 1991, doi: https://doi.org/10.1016/0894-1777(91)90027-O.
DOI: https://dx.doi.org/10.21622/MARLOG.2025.14.1.76
Refbacks
- There are currently no refbacks.
Copyright (c) 2025 Miral Michel, Adham Eladly, Shehab Mostafa, Gerges Refaat, Belal Tarek, Mohamed Hussein Shokry, Mahmoud Ismail, Ibraheem Gamal, Ahmed S. Shehata
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The International Maritime Transport and Logistics Journal (MARLOG)
E-ISSN: 2974-3141
P-ISSN: 2974-3133
Published by:
Academy Publishing Center (APC)
Arab Academy for Science, Technology and Maritime Transport (AASTMT)
Alexandria, Egypt