کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1725742 1520712 2014 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical study on the water impact of 3D bodies by an explicit finite element method
ترجمه فارسی عنوان
مطالعه عددی بر تاثیر آب بر روی اجسام سه بعدی با استفاده از یک روش عنصر محدودی صریح
کلمات کلیدی
مدل سازی عددی، تاثیر آب، روش عددی صریح و صریح، ضریب تاثیر، اسلم مبدل موج
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
چکیده انگلیسی


• The water impact of three-dimensional buoys is investigated by an Arbitrary–Lagrangian Eulerian (ALE) solver.
• The interface between the solid structure and the fluids is captured by Volume of Fluid method.
• Convergence studies are carried out for three dimensional hemisphere and cones with different deadrise angles.
• It is found that the mesh density of the impact domain is very important to the quality of the results.
• The numerical calculations are validated both for the drop cases and the ones with constant impact velocity.

The hydrodynamic problem of the water impact of three-dimensional buoys is investigated by the explicit finite element method with an Arbitrary-Lagrangian Eulerian (ALE) solver. The fluid is solved by using an Eulerian formulation, while the structure is discretized by a Lagrangian approach, and a penalty coupling algorithm enables the interaction between the body and the fluids. The remap step in the ALE algorithm applies a donor cell+HIS (Half-Index-Shift) advection algorithm to update fluid velocity and history variables. The interface between the solid structure and the fluids is captured by Volume of Fluid method. Convergence studies are carried out for three dimensional hemisphere and cones with different deadrise angles. It is found that the mesh density of the impact domain is very important to the quality of the simulation results. The contact stiffness between the coupling nodes affects the local peak pressure values. The numerical calculations are validated by comparing with other available results, for both the drop cases and the ones with constant impact velocity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 78, 1 March 2014, Pages 73–88
نویسندگان
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