J. Trulsen
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View article: Combustion models for shock-induced cloud ignition of aluminium particles using smoothed particle hydrodynamics
Combustion models for shock-induced cloud ignition of aluminium particles using smoothed particle hydrodynamics Open
View article: Impulse-driven oscillations of the near-Earth's magnetosphere
Impulse-driven oscillations of the near-Earth's magnetosphere Open
It is argued that a simple model based on magnetic image arguments suffices to give a convincing insight into both the basic static as well as some transient dynamic properties of the near-Earth's magnetosphere, particularly accounting for…
View article: Impulse-driven oscillations of the near-Earth’s magnetosphere
Impulse-driven oscillations of the near-Earth’s magnetosphere Open
It is argued that a simple model based on magnetic image arguments suffices to give a convincing insight into both the basic static as well as dynamic properties of the near-Earth’s magnetosphere. Qualitative results can be obtained for th…
View article: On the applicability of Taylor's hypothesis, including small sampling velocities
On the applicability of Taylor's hypothesis, including small sampling velocities Open
Taylor's hypothesis, or the frozen turbulence approximation, can be used to estimate also the specific energy dissipation rate $\epsilon$ by comparing experimental results with the Kolmogorov–Obukhov expression. The hypothesis assumes that…
View article: Anomalous transport due to large coherent structures in a magnetized toroidal plasma
Anomalous transport due to large coherent structures in a magnetized toroidal plasma Open
Anomalous transport due to large coherent structures, or coherent events, is studied experimentally in a magnetized toroidal discharge plasma. The present analysis emphasizes anomalous plasma losses as well as transport of electron thermal…
View article: Feeding of Plankton in a Turbulent Environment: A Comparison of Analytical and Observational Results Covering Also Strong Turbulence
Feeding of Plankton in a Turbulent Environment: A Comparison of Analytical and Observational Results Covering Also Strong Turbulence Open
The present studies address feeding of plankton in turbulent environments, discussed by a comparison of analytical results and field data. Various models for predator-prey encounters and capture probabilities are reviewed. Generalized form…
View article: Feeding of plankton in turbulent oceans and lakes
Feeding of plankton in turbulent oceans and lakes Open
Analytical models for the statistical distribution of the gut content of fish larvae in a turbulent ocean environment are compared to data obtained in a field experiment. The proposed model allows the nutrition state and thereby the surviv…
View article: A solvable model for the basic properties of a simple magnetized plasma torus
A solvable model for the basic properties of a simple magnetized plasma torus Open
A simple magnetized plasma torus is modeled by using a 'top-hat' density variation. The benefit of this simplification is an exactly solvable model, allowing for a few additions, such as an externally maintained parabolic steady state pote…
View article: Plankton’s perception of signals in a turbulent environment
Plankton’s perception of signals in a turbulent environment Open
Aquatic micro-organisms often depend on detecting signals caused by motions in the surrounding flow. The antennae and setae of plankton are considered as examples of small fibers that here serve to detect variations in the local fluid velo…
View article: Magnetic field-aligned plasma currents in gravitational fields
Magnetic field-aligned plasma currents in gravitational fields Open
Analytical models are presented for currents along vertical magnetic field lines due to slow bulk electron motion in plasmas subject to a gravitational force. It is demonstrated that a general feature of this problem is a singularity in th…
View article: Experimental results from the Constance B magnetic mirror
Experimental results from the Constance B magnetic mirror Open
View article: Circular waveguide mode converters at 140 GHz
Circular waveguide mode converters at 140 GHz Open
A unified derivation of the coupled mode equations for circular waveguide is presented. Also, approximate design criteria for TE/sub 0n/ to TE/sub 0n'/ axisymmetric, TE/sub 01/ to TE/sub 11/ wriggle, and TE/sub 01/ to TM/sub 11/ bend conve…