Defining Geometry Motion from a Text File

Duret Come

Overview

This model is an EDEM coupling interface application that allows you to define the movement of a geometry based on a text file. In the attached "motion_text.zip" you will find the following:

• motion_text.cpp : The source code
• motion_text.exe : The .exe of the compiled application
• motion_text.txt: The preference file associated to the application. In this preference file:
  • Line 1 : Name of the geometry that will be moved
  • Line 2 : timestep, number of data points, simulation end time
  • Line 3 and after : Time Vx Vy Vz ωx ωy ωz, where V is the velocity and ω is the angular velocity
• example folder : contains the example simulation deck

This can be useful when the geometry has a complex motion that would be difficult to define using only EDEM kinematics, and without having to couple EDEM with a MBD software. As an example, one can use the following workflow:

• Calculate the motion of the geometry in an MBD software
• Export the motion data (global axis, at the center of the geometry) as a text file and enter the necessary information in "motion_text.txt" as described above
• Set up your EDEM deck, start the coupling server and run the .exe application

Usage/Installation Instructions

1. Set motion_text.txt with the name of the geometry to be controlled in EDEM, and define its velocities and angular velocities.
       Place this file in the same folder as motion_text.exe.
2. Launch the simulation deck, then activate the coupling interface from the Simulator.
3. Run motion_text.exe. This should automatically start the simulation.