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ERCOFTAC (European Research Community on Flow, Turbulence and Combustion) brings together researchers from universities, research institutes and industries that deal with wide areas of fluid, turbulence and combustion research. Every two years ERCOFTAC organizes a workshop about Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES), which are the most accurate and demanding simulations of fluid flows.

In the area of ​​single-phase flows of fluids, a lot has been done in the recent years. Nevertheless, the development of numerical codes continues in the direction of greater precision of numerical methods and calculation optimization. At the same time, the constant increase in computational power improves the understanding of certain phenomena, especially in the field of heat transfer (eg, the very high Prandla number, convective jet cooling, etc.) , hydrodynamic instability (eg Rayleigh-Bénard convection, von Kármán's swirl paths, Kelvin-Helmoltz instability, etc.), the impact of surface treatment of walls on the flow of fluid, mechanical interaction of a liquid with a structure, etc. A large part of the research is currently focused on simulating two-phase flows that are more demanding and will play an important role in the development of accurate and reliable numerical methods in the coming decades, as well as a better understanding of the phenomena that we encounter every day both in nature and in various industrial processes, eg. from forecasting time and floods to improving the efficiency of heat transfer in nuclear power plants.

Meetings and workshops, held at the Carlos III University in Madrid between 5 and 7 June 2019, were attended by dr. Blaž Mikuž from the Jožef Stefan Institute for Reactor Engineering. The workshop was presented with a paper entitled "LES of a Taylor bubble and co-current turbulent pipe flow" in co-authorship with dr. E.M.A. Frederix and E.M.J. Komen from Nuclear Research and Consultancy Group (NRG), Netherlands.


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