ACU-T: 4000 Transient Dam Break Simulation
Prerequisites
This tutorial introduces you to the workflow for setting up an AcuSolve transient dam break simulation using HyperMesh CFD. Prior to starting this tutorial, you should have already run through the introductory tutorial, ACU-T: 1000 UI Introduction, and have a basic understanding of HyperMesh CFD and AcuSolve. To run this simulation, you will need access to a licensed version of HyperMesh CFD and AcuSolve.
Problem Description
The problem to be addressed in this tutorial is shown schematically in the figure below. It consists of a square water column held in place by the reservoir walls. At time t=0, the walls are removed and the water column is now free to flow out. The simulation can be used to visualize and study the surge patterns as the column of water rushes out, as in a dam wall break.
Start HyperMesh CFD and Create the HyperMesh Model Database
Import and Validate the Geometry
Import the Geometry
Validate the Geometry
Set Up the Problem
Set Up the Simulation Parameters and Solver Settings
Assign Material Properties
Define Flow Boundary Conditions
Generate the Mesh
In this step, first you will create a surface mesh using the Interactive meshing tool; then, you will specify a global mesh size and growth rate for the model and generate the volume mesh using the Batch tool in the Mesh ribbon.
Create Surface Mesh
Generate Volume Mesh
Define Nodal Outputs and Nodal Initial Conditions
In this step, you will define the nodal output frequency and then specify the nodal initial conditions for the water column.
Define Nodal Output Frequency
Define the Nodal Initial Conditions
Run AcuSolve
Post-Process the Results with HM-CFD Post
Summary
In this tutorial, you successfully learned how to set up and solve a multiphase flow problem using HyperMesh CFD and AcuSolve. You started by importing the geometry and then completed the flow set up. Once the volume meshing was done, you specified the field initial conditions for the water column using the zone initialization tool. Once the solution was computed, you post-processed the results using the Post ribbon. Here, you generated an animation of the water flow as it surged once the dam walls were removed.