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#1 |
New Member
cody
Join Date: Nov 2023
Posts: 7
Rep Power: 2 ![]() |
Hello REEF3D Team,
I am currently using CFD for harbor resonance-related analysis. I have created a tank with dimensions of 40 meters in the x-direction and 2 meters in the y-direction. On the right side, I have placed a structure with two openings to observe the water level changes when waves enter these openings. However, as I need to observe the phenomenon after waves enter the openings on the right side, I did not include other wave dissipation features, such as numerical beaches, on the right side of the tank. However, with this setup, I have noticed that reflected waves significantly impact the subsequently generated waves. I would like to inquire about how to avoid the influence of reflected waves on the waves generated later. Thank you in advance, Cody |
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#2 |
Super Moderator
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 396
Rep Power: 18 ![]() |
Hi Cody,
for harbor resonance, CFD may be a bit overkill. Already, your mesh is probably under-resolved and the reason for the wave dissipation. I would recommend using SFLOW for your case (harbor resonance = long waves, so it should do fine). It will be much faster and you can resolve it to the required level. |
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#3 |
New Member
cody
Join Date: Nov 2023
Posts: 7
Rep Power: 2 ![]() |
Hello Bihs,
Thank you for your response and suggestions. I have started using SFLOW to analyze harbor resonance issues. Initially, I simulated an empty water tank to ensure that the generated waves align with theoretical expectations. During the experiment, I encountered an issue. When I set the grid size to 0.05 and the length of the y-coordinate to 0.05, the SFLOW calculation results closely matched the theoretical results (please refer to the attached image y_0.5_wave_time). However, when I changed the y-coordinate to 2.0 while keeping other conditions constant, I observed a significant decrease in wave height in the SFLOW results. I would like to know how to address and correct this issue. Attached are my executable files and the spatial and temporal output result images of the waves at y=2.0 (please see attached images y_2_wave_time and y_2_wave_space). I look forward to your further advice and guidance. Thank you very much. |
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dissipation |
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