Some aspects of fluidstructure coupling
Abstract
The formulation used in an algorithm that couples three dimensional hydrodynamic and structural domains is discussed. The fluid domain is governed by the NavierStokes equations, and the structural domain is governed by the equations of nonlinear structural dynamics. Here, both the fluid and structure are discretized using finite elements. The fluid is discretized with eightnoded quasiEulerian hexahedrons and the structural components are represented by Lagrangian triangular plate elements. The semidiscretized equations of motion are solved using an explicit temporal integrator. The coupling is accomplished by satisfying interface mechanics. The structure imposes kinematic constraints to the moving fluid boundary, and the fluid in turn provides an external loading on the structure. At each interface node, normals are computed from the nodal basis functions of only the hydrodynamic nodes.
 Publication:

Presented at the ASME Pressure Vessel and Piping Conf
 Pub Date:
 March 1982
 Bibcode:
 1982asme.conf.....K
 Keywords:

 Dynamic Structural Analysis;
 Hydrodynamics;
 Nuclear Power Reactors;
 Reactor Safety;
 Equations Of Motion;
 Finite Element Method;
 NavierStokes Equation;
 Fluid Mechanics and Heat Transfer