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This is a basic tutorial for fluid-structure interaction modelling with ALE formulations. The simulation in this video is a quarter model of the simulation performed by Bisagni and Pigazzini (2017) https://www.tandfonline.com/doi/full/... 7:10 Correction: MU for water should be 1e-9 Things that I cover in this video: How to create fluid and domain parts with ALE formulation How to modify the density of sphere to achieve a desired mass How to create quarter model of a symmetrical problem How to use SPC set to apply plane symmetric boundary conditions How to use MAT_NULL and EOS for water How to define Vacuum part (domain for fluid) How to define the interaction between Lagrange and ALE (coupling between the fluid and structure) How to define the d3plot intervals based on the total number of plots How to display an overlay graph How to plot the FSI database For more details about ALE, you can check out my published papers: Failure Prediction in Bulk Metal Forming Process https://www.hindawi.com/journals/ijme... A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method https://www.mdpi.com/2077-1312/8/10/756 3D Numerical Simulation of Seamless Pipe Piercing Process by Fluid-Structure Interaction Method https://www.matec-conferences.org/art... A Proposed Solution to The Crack-Like Flaws in Hot Forging Process Based on Numerical Simulations with Ls-Dyna https://www.researchgate.net/publicat... Presentation slides covering good point for FSI modeling with ALE: http://ftp.lstc.com/anonymous/outgoin...