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 […]
Convergence in OpenFoam When setting up a simulation, stability is very important of the simulation. If a simulation does not converge, it often depends on the boundary conditions. Stability and convergence often are limited by the chosen boundary conditions. The 5 most common reasons for a not converging The 5 most common reasons for a not converging CFD simulation are the following: Wrong or bad […]
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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 […]
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 […]
Vortex shedding describes a flow of a fluid past a bluff (not a streamlined structure) body at defined velocities. The vortices are depending on the size and shape of the body, the fluid and the velocity. In a flowing fluid, vortices are created in the lee side of the body. If the body creates a periodic alternating vortices, these are forming a Von Kármán vortex […]
OpenFoam tutorial for the mixing of two gases with interFoam In this tutorial we are using Helyx as a front end for OpenFoam to simulate the mixing of two gases. The complete workflow is displayed, from the STL modeling in Blender, Helyx to the postprocessing with Paraview is available at this page. The simulation start with all air within a cylinder . Then the air […]
CFD Simulation with OpenFoam In this tutorial we are using Helyx as a front end for OpenFoam. The complete workflow is displayed, from the CAD, Helyx to the postprocessing with Paraview. The video focus’ on a one inlet/multi outlet problem, where it is not clear how much water will flow out of the every opening. The boundary condition are set to the following values: outlet: […]
