Refine
Year of publication
- 2009 (369) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (85)
- Fachbereich Wirtschaftswissenschaften (45)
- IfB - Institut für Bioengineering (40)
- Fachbereich Bauingenieurwesen (38)
- Fachbereich Elektrotechnik und Informationstechnik (38)
- Fachbereich Energietechnik (35)
- INB - Institut für Nano- und Biotechnologien (32)
- Fachbereich Chemie und Biotechnologie (30)
- Fachbereich Maschinenbau und Mechatronik (25)
- Fachbereich Luft- und Raumfahrttechnik (24)
Document Type
- Article (199)
- Conference Proceeding (86)
- Book (32)
- Part of a Book (24)
- Conference: Meeting Abstract (7)
- Doctoral Thesis (5)
- Patent (5)
- Report (5)
- Part of a Periodical (2)
- Working Paper (2)
Keywords
- Blitzschutz (4)
- Fließgewässer (3)
- Geodatenbank (3)
- Geodatenhaltung (3)
- Geoinformationen (3)
- Geoinformationssystem (3)
- Papierkunst (3)
- Aachen / Fachhochschule Aachen (2)
- Aachen University of Applied Sciences (2)
- FH Aachen (2)
Das Wohnungsrecht : Ausübungshindernis, Sozialhilferegress und Fremdvermietung bei Übergabeverträgen
(2009)
Next Generation Access Networks: Why is there a higher risk of investment and how to deal with it?
(2009)
The powerful avalanche simulation toolbox RAMMS (Rapid Mass Movements) is based on a depth-averaged
hydrodynamic system of equations with a Voellmy-Salm friction relation. The two empirical friction parameters
μ and correspond to a dry Coulomb friction and a viscous resistance, respectively. Although μ and lack a
proper physical explanation, 60 years of acquired avalanche data in the Swiss Alps made a systematic calibration
possible. RAMMS can therefore successfully model avalanche flow depth, velocities, impact pressure and run
out distances. Pudasaini and Hutter (2003) have proposed extended, rigorously derived model equations that
account for local curvature and twist. A coordinate transformation into a reference system, applied to the actual
mountain topography of the natural avalanche path, is performed. The local curvature and the twist of the
avalanche path induce an additional term in the overburden pressure. This leads to a modification of the Coulomb
friction, the free-surface pressure gradient, the pressure induced by the channel, and the gravity components
along and normal to the curved and twisted reference surface. This eventually guides the flow dynamics and
deposits of avalanches. In the present study, we investigate the influence of curvature on avalanche flow in
real mountain terrain. Simulations of real avalanche paths are performed and compared for the different models
approaches. An algorithm to calculate curvature in real terrain is introduced in RAMMS. This leads to a curvature
dependent friction relation in an extended version of the Voellmy-Salm model equations. Our analysis provides
yet another step in interpreting the physical meaning and significance of the friction parameters used in the
RAMMS computational environment.
Microfabrication, characterization and analytical application of a new thin-film silver microsensor
(2009)
Handbook of space technology
(2009)
Halbleiterschaltungstechnik
(2009)
Kommentierung zu §§ 705-740
(2009)
A new solar desalination system with heat recovery for decentralised drinking water production
(2009)
Von Daniel Düsentrieb zu Dagobert Duck. Trinationale Master Class in High-Tech Entrepreneurship
(2009)
Die Jahresabschlussanalyse
(2009)
Magnetotomography and Electric Currents in a Fuel Cell / Lustfeld, H. ; Reißel, M. ; Steffen, B.
(2009)
INNOTRAP - innovative Rußfilter für LKW-Dieselmotoren : Abschlussbericht Förderkennzeichen 16IN0313
(2009)