Towards an efficient immersed boundary method within an open source framework
Sprache des Vortragstitels:
12th International Conference on Multiphase Flow in Industrial Plants
Sprache des Tagungstitel:
In this paper we present the realisation of the so-called fictitious domain method within the Open Source Computational Fluid Dynamics (CFD) framework OpenFOAM® . This method, based on the work of Shirgaonkar et al. and Patankar et al. provides a very efficient way of considering moving bodies in a fixed domain, using just one single velocity and pressure field for both the velocity and the pressure of the different phases.Besides a detailed description of the algorithm we present an application example in the frame of the CFD-DEM implementation CFDEM  in which the Open Source Discrete Element Method LIGGGHTS takes the part of modelling the granular material and OpenFOAM® is used for the calculation of the flow field by means of the immersed boundary method. The results gained from the calculations are in good accordance with results found in literature or stemming from analytics.
The feasibility of the CFD-DEM coupling CFDEM itself has been shown in several previous papers presented by the authors . The implementation of the CFD-DEM structure permits fully parallel simulations on distributed memory machines using MPI functionality.