u3.13.03 2D models_ FLUIDE, 2D_ FLUI_STRU, AXIS_FLUIDE, AXIS_FLUI_STRU

Summary:

This document describes for 2D_ FLUIDE, 2D_, 2D_ FLUI_STRU, AXIS_FLUIDE, AXIS_FLUI_STRU models:

• the degrees of freedom carried by the finite elements that support modeling,

• the related support meshes,

• the loads supported,

• non-linear possibilities,

• test cases implementing the models.

The 2D_ FLUIDE (elements in a plane) and 2D_ FLUI_STRU (1D fluid-structure interaction elements) models correspond to the 2D formulation in linear hypothesis of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [R4.02.01]. Currently, consideration of free surface is not developed.

The models AXIS_FLUIDE (elements in a plane) and AXIS_FLUI_STRU (1D elements of fluid-structure interaction) correspond to the formulation in axisymmetry in linear hypothesis of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [R4.02.01]. Currently, consideration of free surface is not developed.

• 1. Discretization
  • 1.1. Degrees of freedom
  • 1.2. Stiffness matrix support mesh
  • 1.3. Cargo support mesh
• 2. Supported loads
• 3. Nonlinear possibilities
  • 3.1. Laws of behavior
  • 3.2. Deformations
• 4. Examples of implementation: test cases