A new modeling approach for turbulent astrophysical flows

• Applicant: Professor Dr. Jens Niemeyer
• Subject Area: Astrophysics and Astronomy
• Term: from 2005 to 2011
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 14045207

• Final Report Year: 2011

Final Report Abstract

We report some results of the first research phase of the FEARLESS project, aimed to the test of new grid refinement criteria suitable for resolving velocity fluctuations in the context of galaxy cluster evolution. Our simulations of a subcluster merger event show that an accurate resolution of the turbulent flow is important not only for following the evolution of the shear instability, but also for its back-reaction on the subcluster core. A better resolution of the turbulent flow can also affect the level of turbulence in the cluster core, according to the first results of our cosmological simulations. Especially in the latter problem, a significant improvement in the modelling is expected from the use of the full FEARLESS implementation.

Publications

• 2008, MNRAS, 388, 1079
  Iapichino, L., Adamek, J., Schmidt, W., & Niemeyer, J. C.
  
• 2008, MNRAS, 388, 1089
  Iapichino, L. & Niemeyer, J.C.
  
• 2008. In: High Performance Computing in Science and Engineering, Garching/Munich 2007, ed. S. Wagner et al (Springer),-45
  Iapichino, L., Niemeyer, J. C , Adamek, J., Paul, S., & Scuderi, M.
  
• 2009, ApJ, 707, 40
  Maier, A., Iapichino, L., Schmidt, W., & Niemeyer, J. C.
  
• 2011, ApJ, 726, 17
  Paul, S., Iapichino, L., Miniati, F., Bagchi, J., & Mannheim, K.