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More CFD users are therefore becoming interested in learning about this method and its applications. While LES is very powerful it also requires some care to be used properly, as it is conceptually very different from RANS, the workhorse of industrial CFD.
This seminar will start by establishing and comparing the fundamental assumptions supporting RANS and LES and, in doing so, will highlight what the true potential of LES is, as well as its limitations. It will continue by way of a short review of the most common LES formulations before allowing time for the presentation of two key applications. The software and hardware requirement of running a LES simulation will also be reviewed as we move towards the end of the day to add a cost dimension to the information pack provided.
More affordable alternatives, so-called hybrid methods, based on LES principles, such as Detached Eddy Simulation (DES), will also be presented together with examples of their applications and own limitations. A brief question and answer session will summarise the day.
With this combination of activities, delegates will leave the seminar having a better understanding of what LES can offer, to which problems it is suited and what constraints and costs it bears.
The presenations and discussion will cover the following themes:-
- RANS - a refresher; including what is behind RANS?
- LES - what is LES? what is implied in the formalism of the LES approach? requirements [numerical/simulation], analysis, convergence, flavours, applications [including illustrations], requirements [computational] and limitations
- Alternative approaches, e.g. hybrid methods such as DES
- Recommendations and wrap-up.
Who Should Attend?
This seminar will be of interest to practitioners and Industrial users of commercial CFD codes in the main, familiarity with standard RANS turbulence modelling such as k-epsilon models will be a prerequisite as RANS will serve as the stepping stone to the day.
Registration and further details can be found on the event webpage at http://nafems.org/events/nafems/2010/LES/.
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