ICFD Incompressible Fluid Solver

This course provides an introduction to the incompressible fluid solver (ICFD) in LS-DYNA. It focuses on the solution of CFD problems, where the incompressibility constraint may be applied, e. g. ground vehicle, aerodynamics, hemodynamics, free-surface problems, ship hydrodynamics, etc. The solver may run as a stand-alone CFD solver, where only fluid dynamics effects are studied, or it can be coupled to the solid mechanics solver to study loosely or strongly coupled fluid-structure interaction (FSI) problems.

The first day of the course includes a presentation of the general principles and applications of the solver, a step by step guide to setting up a simple CFD problem, advanced feature introduction (FSI, conjugate heat transfer) and so forth. A brief review of basic fluid mechanics and CFD concepts are also offered such that no expert knowledge of fluids is required. The second day will deal with the newly implemented features and advanced applications.

Contents

Introduction to the ICFD solver in LS-DYNA (Day 1)

• General principles and supported applications
• Step by step keyword description
• Setting up a pure CFD problem for aerodynamics
• Setting boundary conditions
• Fluid volume mesher
• Mesh refinement tools
• Strong and loose FSI coupling
• Thermal coupling and conjugate heat transfer
• Computation of the heat transfer coefficient

Advanced topics and new features (Day 2)

• Advanced controlling and monitoring tools
• Turbulence modeling
• New models and picking the right one
• Law of the wall and boundary layer
• Non Newtonian flows
• Flow in porous media
• DEM coupling
• New postprocessing tools in LS-PrePost