Abstract Details
From lasers to the Universe: Scaling Laws in Laboratory Astrophysics
Author: Serge E. BOUQUET
Requested Type: Oral Only
Submitted: 2009-04-24 10:12:06
Co-authors: E. Falize, C. Michaut, B. Loupias
Contact Info:
Commissariat Energie Atomique (CEA)
Centre de BRUYERES-LE-CHATEL
ARPAJON, FRANCE 91297
FRANCE
Abstract Text:
In this communication, a theoretical connection between laboratory astrophysics experiments and astrophiscal phenomena or objects is achieved. For this purpose, scaling laws based on invariance considerations of the equations of the model are derived. Several plasma types are considered, i.e. purely hydrodynamic, radiatively optically thin, radiatively optically thick ... and it is shown the way this approach works in each case. In addition to the classical, well-known dimensionless numbers, this procedure provides additional "invariants" that are not necessarily with no dimension. It may also lead to a reduction of the order of the differential system (equations of the model) and to a huge simplification of the equations, allowing obtaining analytical solutions (either time-dependent or not). Finally, specific cases corresponding to specified experiments are shown as examples of application of the former scaling laws.
Comments: