Introduction to ANSYS Fluid Dynamics (CFX, Fluent) on LRZ HPC Systems

The focus of this 5-day course is targeted on researchers with good knowledge in the fundamentals of fluid mechanics and potentially with some first experience in Computational Fluid Dynamics (CFD). The course will focus on the introduction to the ANSYS Fluid Dynamics software packages, i.e. ANSYS CFX and ANSYS Fluent. Further, participants will be familiarized with the main steps of the typical CFD workflow, in particular with CFD preprocessing/ CFD setup creation, serial and parallel solver execution and CFD postprocessing in both CFD solver systems CFX and Fluent. Correctness of boundary conditions and CFD setup specifications, solver convergence control, solver monitoring, customization capabilities of the solvers and the post­pro­cessing as well as recommended CFD best practices are covered.

The course further focusses on the usage of the ANSYS CFD software in a typical Linux cluster environment for massively parallel computations. This includes a basic Linux primer, introduction to LRZ HPC systems and network environment, intro to the use of schedulers like Slurm and LoadLeveler, CFD remote visualization and aspects of successful CFD simulation strategies in such an HPC environment. Finally some aspects of workflow automation using Python as scripting language are targeted as well.

Wednesday (10. April 2019, 2pm - 4:30pm) : CADFEM Session

In addition to the high-end solvers ANSYS Fluent and CFX the ANSYS software further provides a variety of simulation tools, which allow a fast and easy application of real time simulation (Discovery Live), or a fully coupled multiphysics simulation (AIM). Coupling of the high-end solvers from various physical domains is easily achieved within the ANSYS Workbench.
In this Wednesday afternoon session, we introduce Discovery Live, AIM and ANSYS Workbench, geometry preparation with Space Claim and finally parametrization, which is available within all three simulation environments. The purpose of this session is to give you a first introduction to the offered options in the ANSYS software portfolio for multiphysics coupling, parametrization, or a quick and easy “guess” of a trend in system behavior through simulation. All software components introduced here are available at LRZ via the ANSYS Multiphysics Campus license.

What participants will not learn in this course?

• Advanced aspects of Linux and computer network infrastructure
• Geometry creation (CAD, SpaceClaim, DM) and meshing (ANSYS Meshing, ICEM/CFD)
• Advanced topics of CFD simulation, like e.g. acoustics, Eulerian and Lagrangian multiphase flows, combustion, radiation, FSI etc.
• Advanced topics of CFD solver customization with User FORTRAN or User Defined Functions (UDF’s) written in C language

This course is addressed to young scientists, PHD students and under-graduate students (Master level) with so far limited to no experience with Computational Fluid Dynamics (CFD), but with the aim to use in future the High-Performance Computing (HPC) resources of the LRZ for their research. Basic knowledge of Linux and LRZ computer environment is a plus.

Handouts/PDF’s of the course are provided to participants.

The CFD and HPC exercises will be done partially on local PC’s running Windows-10 and on the IvyMUC Linux Cluster at LRZ. Files of the interactive sessions are made available to participants.