https://youtu.be/ooV7NI0nIj4 Coupled CFD and DEM Simulation A particle bed is fluidised by an airstream coming from the bottom. It shows the results of direct interaction of a fluid phase and a particle system. For the simulation Liggghts 3.8.0 and OpenFoam 5.x were used. This example will also be major part of a future tutorial where we will explain in detail, how to set up a […]
The installation of the coupling for Liggghts and OpenFoam called CFDEM can be difficult for beginners in the environment of Linux. While some program must only be downloaded from a website, it can be necessary for other programs to compile them on your computer. One of these programs for DEM simulations is Liggghts3.8.0. For the coupling CFDEM openFoam5.x and the coupling files must also be […]
When new roads get constructed or renewed the asphalt surface is usually done by using asphalt paving machines. These pavers are constructed to allow a truck to dump the warm asphalt in the front sections. The asphalt then gets conveyed through the machine and falls into the dispenser where screw conveyors spread the warm asphalt sideways. In this video we want to give an example, […]
High Performance Computing on a Budget A very common question in the comments and the mails we receive through our Internet page is about the computer system which one should get when starting simulations with liggghts or openFoam. To be fair this is not as easy to answer as it may seem. First of all. This depends very much on you financial situation and on […]
Background: Screw Conveyor Screw conveyors are continuous conveyors without traction means. They usually consist of a closed conveyor trough or conveyor pipe in which the conveyor screw rotates continuously around its own axis. The conveying screw is therefore the only rotating component. Screw conveyors are characterized by their simple, robust and inexpensive design. Screw conveyors can be used for the transport of powdery, fine-grained and […]
This simulation of a cyclone is done with the internal particle solver of OpenFoam called MPPICFoam. We can see here a particle material with a density of 1000 kg/m³ which could be something like green hardwood. These particles get conveyed by an airstream through a cyclone which seperates the particle due to centrifugal force. The MPPICFoam solver is used to solve more or less dens […]
The installation of LIGGGHTS and any software in a perhaps unknown environment of Linux can be quite challenging. While some program must only be downloaded from a website, it can be necessary for other programs to compile them on your computer. One of these programs for DEM simulations is LIGGGHTS. With this tutorial we want to give the basic steps to download and install Ubuntu 20.04 […]
We created a tutorial for a coupled CFD-DEM simulation using LIGGGHTS and OpenFoam. Please check out the video file on youtube. I hope you find it helpful. This is a full tutorial, starting with the CAD model, the meshing with snappyHexMesh, the boundary conditions and the DEM simulation to the final coupled CFD and DEM simulation using CFDEM. You can also follow the tutorial on […]
This Video shows the particle movement in a rotating drum. The example of the rotating drum can represents the general function of different industrial applications. These apllications includes: Rotary kiln used for the cement production or waste incineration (especially hospital waste) Rotary drum mixer for the blending of different ingredients of a product ( e.g. food production) Rotary tube sieve for the seperation of different […]
This video shows the second part of our particle simulation of the filling and discharge process of a silo using a belt conveyor. For this simulation we use the discrete element methode open source software liggghts. In a upcomming tutorial the usage of the belt will be presented. In general the suitable selection of a mechanical discharge device, the properties of the bulk material, […]
