Three-dimensional local ALE-FEM method for fluid flow in domains containing moving boundaries/objects interfaces [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 622.33 *Carbonaceous materials
• Thông tin xuất bản: Los Alamos, N.M. : Oak Ridge, Tenn. : Los Alamos National Laboratory ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: 199 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 258589
• Chủ đề: 1. 20 fossil-fueled power plants; 2. 32 energy conservation, consumption, and utilization; 3. 33 advanced propulsion systems; 4. 42 engineering; 5. 97 mathematics and computing

Tóm tắt

 A three-dimensional finite element method for the numerical simulations of fluid flow in domains containing moving rigid objects or boundaries is developed. The method falls into the general category of Arbitrary Lagrangian Eulerian methods
  it is based on a fixed mesh that is locally adapted in the immediate vicinity of the moving interfaces and reverts to its original shape once the moving interfaces go past the elements. The moving interfaces are defined by separate sets of marker points so that the global mesh is independent of interface movement and the possibility of mesh entanglement is eliminated. The results is a fully robust formulation capable of calculating on domains of complex geometry with moving boundaries or devises that can also have a complex geometry without danger of the mesh becoming unsuitable due to its continuous deformation thus eliminating the need for repeated re-meshing and interpolation. Moreover, the boundary conditions on the interfaces are imposed exactly. This work is intended to support the internal combustion engines simulator KIVA developed at Los Alamos National Laboratories. The model's capabilities are illustrated through application to incompressible flows in different geometrical settings that show the robustness and flexibility of the technique to perform simulations involving moving boundaries in a three-dimensional domain.