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amini, S., Rostami Varnousfaaderani, M., Dehghan Manshadi, M., Norouzi, H. (2024). Calculation of Amphibian Floating Drag under the Effect of Sea Waves Using Computational Fluid Dynamics. Electronic and Cyber Defense, 13(2), 113-124.
saleh amini; Mahmoud Rostami Varnousfaaderani; Mojtaba Dehghan Manshadi; Hossein Norouzi. "Calculation of Amphibian Floating Drag under the Effect of Sea Waves Using Computational Fluid Dynamics". Electronic and Cyber Defense, 13, 2, 2024, 113-124.
amini, S., Rostami Varnousfaaderani, M., Dehghan Manshadi, M., Norouzi, H. (2024). 'Calculation of Amphibian Floating Drag under the Effect of Sea Waves Using Computational Fluid Dynamics', Electronic and Cyber Defense, 13(2), pp. 113-124.
amini, S., Rostami Varnousfaaderani, M., Dehghan Manshadi, M., Norouzi, H. Calculation of Amphibian Floating Drag under the Effect of Sea Waves Using Computational Fluid Dynamics. Electronic and Cyber Defense, 2024; 13(2): 113-124.

Calculation of Amphibian Floating Drag under the Effect of Sea Waves Using Computational Fluid Dynamics

مکانیک سیالات و آیرودینامیک
Article 9, Volume 13, Issue 2 - Serial Number 33, November 2024, Pages 113-124    PDF (1.32 M)
Document Type: Original Article
Authors
saleh amini1; Mahmoud Rostami Varnousfaaderani* 2; Mojtaba Dehghan Manshadi3; Hossein Norouzi4
1PhD student Malek Ashtar University of Technology, Shahinshahr, Isfahan
2assistant professor Malek Ashtar University of Technology, Shahinshahr, Isfahan
3professor, Malek Ashtar University of Technology, Shahinshahr, Isfahan
4PhD, Malek Ashtar University of Technology, Shahinshahr, Isfahan
Receive Date: 06 July 2024,  Revise Date: 29 September 2024,  Accept Date: 05 November 2024 
Abstract
Hovercrafts are amphibious marine vehicles that are capable of moving on the surface of the water and land. In this article, hovercraft drag has been calculated at different speeds and in three states. The first state of floating completely submerged in the air, the second floating above the surface of the ground and the third considering the waves below the float. In the second and third cases, numerical modeling has been done with different floating distances from the ground or the sea. Simulation in the first and second states is done in single phase and in the third state in two phases. 14 and 16 simulations have been done in single-phase and two-phase modes, respectively. A total of 30 simulations were carried out, a parametric study on the variables of water depth, wave length and height, floating speed and distance from the surface were considered.The cells of the solution domain is of trimmer type and structured in the Star CCM software, and for the numerical solution, the finite volume method is used in the Fluent software. The standard k-ω turbulence model has been used to model turbulence in single-phase mode, and the k-ω sst model has been used in two-phase mode. In order to identify and simulate the free surface of the flow in the third state, the fluid volume fraction method has been used. In order to validate, the numerical modeling of the drag of the KCS container carrier was carried out, and the comparison of the numerical results with the experimental results were in good agreement. The results showed that increasing the height of the waves decreases and increasing the wavelength increases the drag force. Also, reducing the distance from the surface reduces the drag force.
Keywords
Amphibious craft; Sea Waves; Drag Force; Two Phase; Free Surface
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