The ICFD solver may run as a stand alone solver or be fully coupled with the the solid mechanics and thermal solvers of LS-DYNA to solve complex multi-physic problems such as flaps oscillating in the wind, drag around vehicles or any type of bluff body, with pitching movement or static, behavior of a heart valve, wave impacts, slamming cases and so forth.
Description: A classic application of the ICFD solver is the study of turbulent flows and drag forces around bluff bodies such as cars or other types of vehicles
Description: The “Turek” problem is a challenging Fluid Structure Interaction (FSI) Benchmark application. The Von Karman vortex street that develops behind the cylinder interacts with the flexible flag. At steady state, periodic oscillations are observed .Large deformations of the flag in the channel occur which results in frequent automatic re-meshing of the fluid domain. It is also a case where the solid density and the fluid density may be equal which usually generates heavy instabilities in FSI cases. It is therefore a good problem for validating the strong FSI coupling available in LS-DYNA.
Description: This hemodynamics example highlights the state of the art strong FSI capabilities of the ICFD solver. Due to the pressure difference, the heart valve leaflets open to allow the blood flow. Then, a strong counter-pressure forces them shut again and the blood flow decreases. Courtesy of Mohammad Hossein of McGill University, Quebec.
Description: This example features a 3D mold filling case with the fluid progressivilly filling the solid shape. This problem may be treated as a conjugate heat transfer problem using strong coupling with the LS-DYNA thermal solver.
Description: This Fluid-Structure Interaction example features the flow around a horizontal wind turbine (HAWT) using a non inertial reference frame.
Description: This 3D validation problem combines sloshing and fluid-structure interaction. It is based on the experimental set up by E.Botia-Vera, A. Souto-Iglesias, A. Bulian and L. Lobovsky, Three sph novel benchmark test cases for free surface flows, 5th ERCOFTAC SPHERIC workshop on SPH applications. In order to solve this case, strong FSI coupling is mandatory.
Description: Free surface flow impacting on a vertical cylinder. The problem reaches steady state where the wave pattern behind the cylinder remains unchanged.
Description: This case represents a stamping application involving FSI and thermal coupling. A hot plate is pressed against a dye. A serpentine tube is embedded in the die and a coolant passes through that pipe which progressively cools the die and the plate.
Description: A bottle with a highly viscous material is squeezed from the sides. The cylinders represent two fingers. The study is aimed at analyzing how much flow re-enters the bottle after the finger forces are released. Courtesy of Procter & Gabmle.
Description: The following example shows a fully coupled Fluid Structure Interaction problem with a free-falling space capsule impacting the water. The fluid is modeled as a free surface flow.