TURBULENT SHEAR ACCELERATION

Forced Turbulent Shear Layer

On particle acceleration in turbulent shear boundary layers of relativistic jets

We discuss processes accelerating cosmic ray electrons at boundaries of relativistic jets. The resulting spectrum is expected to posses two characteristic components: a power-law distribution at lower energies and a harder high energy component preceding the high energy cut-off. An example of high energy spectrum from such electron distribution is presented, including the synchrotron and the in...

Overview of turbulent shear flows

A brief review of basic concepts and folklore in shear turbulence. 1 Reynolds decomposition Experimental measurements show that turbulent flows can be decomposed into welldefined averages plus fluctuations, v = v̄ + v′. This is nicely illustrated in the Turbulence film available online at http://web.mit.edu/hml/ncfmf.html that was already mentioned in Lecture 1. In experiments, the average v̄ is ...

Comparison of Turbulent Particle Dispersion Models in Turbulent Shear Flows

This work compares the performance of two Lagrangian turbulent particle dispersion models: the standard model (e.g., that presented in Sommerfeld et al. (1993)), in which the fluctuating fluid velocity experienced by the particle is composed of two components, one correlated with the previous time step and a second one randomly sampled from a Wiener process, and the model proposed by Minier and...

Turbulent Burning, Flame Acceleration, Explosion Triggering

.......................................................................... iii Sammanfattning ..................................................................... iv List of publication ............................................................... v Acknowledgments ............................................................... vii