Some researchers have used the Reynolds-Averaged Navier–Stokes equations to reduce the long running time (Wu and Hsiao, Sik, Le, and Inverno et al. For example, studies by Zhao, Soo, Teixeira, Liu, Ren, and Ataur, used Navier–Stokes as the mathematical model and faced several challenges such as long running time and complex derivation. However, complicated derivation methods may arise from the mathematical model and numerical methods that are being used. With these limitations on physical testing, various mathematical models have been formulated to simulate breakwater-induced wave damping phenomena. Although physical testing is recommended for all design applications, using experimental data as a benchmark is not cost-effective and difficult to replicate due to the complexity of site specific considerations. Particularly, experimental results by Dimitros showed that a rectangular breakwater performs better in dissipating wave energy in comparison with the hemi-cylindrical model for the case of rigid breakwaters. Many researchers have investigated the effectiveness of a submerged breakwater experimentally, such as Armono, Abdul, Dimitros, Hall, Lorenzoni and Ahmadian. In addition to providing environmental benefits, these structures have also found applications as preliminary defense measures in extreme wave climates. In comparison to sub-aerial breakwaters, submerged structures permit the passage of some wave energy and in turn allow for circulation along the shoreline zone but at the cost of a reduced level of protection. As indicated by the name, these structures are constructed below a specified water level. In recent years, increased attention has been given to submerged breakwaters. The result of this paper may be useful in wave reflector engineering and design, particularly that of rectangle-shaped wave reflectors, as it can serve as a basis for designing bar wave reflectors that reduce wave amplitudes optimally. For validation, we compare the transmission coefficient values obtained from the analytical solution, numerical scheme, and experimental data. We then construct a numerical scheme for the SWEs based on the finite volume method on a staggered grid to simulate the propagation of a monochromatic wave as it passes over a single submerged rectangular bar. We also measure the effectiveness of the bar by comparing the amplitude of the incoming wave before and after the wave passes the submerged bar, and extend the result to the case of n-submerged bars. From the analytical solution, we derive the wave reflection and transmission coefficients and determine the optimal height and length of the bar that would give the smallest transmission coefficient. We first solve these equations for the single bar case using separation of variables to obtain the analytical solution for the wave elevation over a rectangular bar wave reflector with specific heights and lengths. So far, 112 ships brought materials for the coal power plant project.Ĭhattogram port has provided pilotage services, tugboat support, radio control and vessel traffic management information system (VTMIS), international ship and port facility security code (ISPS), and stevedoring services to these ships.Ībout 1.37 lakh tons of goods have been handled in these ships, from which the port received Tk6.84 crore revenue.In this paper, we investigate the wave damping mechanism caused by the presence of submerged bars using the Shallow Water Equations (SWEs). Power generation will begin in late 2025 or early 2026."įor the first time on 29 December 2020, the Matarbari jetty received a foreign ship carrying equipment for the project, and on 15 July 2021, it saw the second one. Big ships carrying 60,000 to 80,000 metric tons of coal will reach the port jetty next March. We are able to unload imported goods very quickly using two jetties. The project is scheduled to end in July 2026.ĬPGCBL Executive Director Abul Kalam Azad told TBS, "So far 75% of the power plant project has been completed. The cost of the project approved in 2014 was estimated at Tk35,984 crore but it was later raised to Tk51,855 crore. The Coal Power Generation Company Bangladesh Limited (CPGCBL) is implementing the 1,200 MW Matarbari Ultra Super Critical Coal-Fired Power Project. The Japan International Cooperation Agency (JICA) will lend Tk12,892 crore, the CPA will provide Tk2,213 crore, and the government Tk2,671 crore for the construction work. The cost of development of Matarbari port has been estimated at Tk17,777 crore.
0 Comments
Leave a Reply. |