The turbulent flow driven by rotating and travelling magnetic fields in a closed cylinder is investigated by means of direct numerical simulations (DNS) and large eddy simulations (LES). Our model is based on the low-induction, low-frequency approximation and employs a spectral-element/Fourier method for discretisation. The spectral vanishing viscosity (SVV) technique was adopted for the LES. The study provides first insights into the developed turbulent flow. In the RMF case, Taylor-Görtler vortices remain the dominant turbulence mechanism, as already in the transitional regime. In contrast to previous predictions we found no evidence that the vortices are confined closer to the wall for higher forcing. In the TMF more than 50 percent of the kinetic energy is bound to the turbulent fluctuations, which renders this field an interesting candidate for mixing applications.
|Title of host publication||Progress in Turbulence III - Proceedings of the iTi Conference in Turbulence 2008|
|Number of pages||4|
|Publication status||Published - 1 Jan 2010|
|Event||3rd Conference on Turbulence, iTi 2008 - Bertinoro, Italy|
Duration: 1 Jan 2008 → 1 Jan 2008
|Conference||3rd Conference on Turbulence, iTi 2008|
|Period||1/01/08 → 1/01/08|