Dust formation in brown dwarf atmospheres under conditions of driven turbulence
Please always quote using this URN: urn:nbn:de:0297-zib-7294
- Based on the knowledge gained from direct numerical simulations which are only possible in the microscale regime, a concept of driven turbulence is presented which allows to enter the mesoscopic scale regime. Here, dust formation under stochastic hydro- and thermodynamic conditions is studied: constructively superimposed stochastic waves initiate dust formation by the creation of singular nucleation events. It, hence, results a varying mean grain size and dust density in space and time. The newly formed dust changes the thermodynamic behavior from almost isotherm to adiabatic and chemically depletes the gas phase.
Author: | Christiane Helling, Rupert Klein, Peter Woitke, Erwin Sedlmayr |
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Document Type: | ZIB-Report |
Tag: | dust formation; stochastic boundaries; turbulence modelling |
MSC-Classification: | 85-XX ASTRONOMY AND ASTROPHYSICS (For celestial mechanics, see 70F15) / 85-08 Computational methods |
85-XX ASTRONOMY AND ASTROPHYSICS (For celestial mechanics, see 70F15) / 85Axx Astronomy and astrophysics (For celestial mechanics, see 70F15) / 85A20 Planetary atmospheres | |
Date of first Publication: | 2003/03/19 |
Series (Serial Number): | ZIB-Report (03-07) |
ZIB-Reportnumber: | 03-07 |
Published in: | Appeared in: N.-E. Piskunov, W.-W. Weiss, D.-F. Gray (eds.) Modelling of Stellar Atmospheres, IAU Symp. -210, 2003 |