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Nonperturbative renormalization group approach to turbulence
Alexander Esser, Siegfried Grossmann
We suggest a new, renormalization group (RG) based, nonperturbative method for treating the intermittency problem of fully developed turbulence which also includes the effects of a…
Sound radiation of 3 MHz driven gas bubbles
Siegfried Grossmann, Sascha Hilgenfeldt, Detlef Lohse +1
The sound radiation of 3 MHz acoustically driven air bubbles in liquid is analysed with respect to possible applications in second harmonic ultrasound diagnostics devices, which ha…
From number theory to statistical mechanics: Bose-Einstein condensation in isolated traps
Siegfried Grossmann, Martin Holthaus
We question the validity of the grand canonical ensemble for the description of Bose-Einstein condensation of small ideal Bose gas samples in isolated harmonic traps. While the gro…
Maxwell's Demon at work: Two types of Bose condensate fluctuations in power-law traps
Siegfried Grossmann, Martin Holthaus
After discussing the key idea underlying the Maxwell's Demon ensemble, we employ this idea for calculating fluctuations of ideal Bose gas condensates in traps with power-law single…
Scaling of the irreducible SO(3)-invariants of velocity correlations in turbulence
Siegfried Grossmann, Detlef Lohse, Achim Reeh
The scaling behavior of the SO(3) irreducible amplitudes of velocity structure tensors (see L'vov, Podivilov, and Procaccia, Phys. Rev. Lett. (1997)) is numerically exam…
Application of extended self similarity in turbulence
Siegfried Grossmann, Detlef Lohse, Achim Reeh
From Navier-Stokes turbulence numerical simulations we show that for the extended self similarity (ESS) method it is essential to take the third order structure function taken with…