1,445 research outputs found
Pairwise wave interactions in ideal polytropic gases
We consider the problem of resolving all pairwise interactions of shock
waves, contact waves, and rarefaction waves in 1-dimensional flow of an ideal
polytropic gas. Resolving an interaction means here to determine the types of
the three outgoing (backward, contact, and forward) waves in the Riemann
problem defined by the extreme left and right states of the two incoming waves,
together with possible vacuum formation. This problem has been considered by
several authors and turns out to be surprisingly involved. For each type of
interaction (head-on, involving a contact, or overtaking) the outcome depends
on the strengths of the incoming waves. In the case of overtaking waves the
type of the reflected wave also depends on the value of the adiabatic constant.
Our analysis provides a complete breakdown and gives the exact outcome of each
interaction.Comment: 39 page
Comet Halley - A carrier of interstellar dust chemical evolution
Wetensch. publicati
Parameter Mapping in the Stability Analysis of Systems with Multiple Delays
The stability of linear systems with multiple delays is considered using parameter plane methods. By mapping contours from the complex variable plane to the parameter plane it is possible to choose control parameters such as loop gain and system delays which will ensure that all closed loop poles have negative real parts
A fine mist of very small comet dust particles
Wetensch. publicati
Interstellar dust as the source of organic molecules in Comet Halley
Wetensch. publicati
Chemical evolution in space - A source of prebiotic molecules
Wetensch. publicati
The dust properties of a short period comet: comet P/Borrelly
Wetensch. publicatieFaculteit der Wiskunde en Natuurwetenschappe
From interstellar dust to comets: the extended CO source in comet Halley
Wetensch. publicatieFaculteit der Wiskunde en Natuurwetenschappe
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