Dataset

Jet spreading and Jet inclination induced through complex vent geometry

Schmid, Markus; Kueppers, Ulrich; Cigala, Valeria; Sesterhenn, Jörn; Dingwell, Donald;

2020-10 || GFZ Data Services

This dataset provides data from 36 rapid decompression experiments performed in the Fragmentation Lab at Ludwig-Maximilians-Universität München (LMU, Munich, Germany) supporting the publication Schmid, M, Kueppers U, Cigala V, Sesterhenn J and Dingwell DB (202x) “Release characteristics of overpressurised gas from complex vents: implications for volcanic hazards”.

The experiments were aimed to constrain the influence of complex vent geometry on the instantaneous gas expansion in a shock-tube setup, mimicking impulsive volcanic explosions. They were performed at the following experimental conditions: 1) six vent geometries (conduit geometry always cylindrical), composed by 2 sets of inner geometry (cylindrical and 15° diverging) with inclined exit planes of 5, 15 or 30° slant angle, 2) constant temperature (25°C), 3) four starting overpressure scenarios (5, 8, 15, 25 MPa), and 4) two reservoir volumes (127.4 cm3, 31.9 cm3), achieved via variable conduit length, with Argon being used for the pressurization.

During the experiments the setup is incrementally pressurized. When the desired experimental pressure in the reservoir is reached, rapid decompression is triggered (Kueppers et al., 2006; Cigala et al., 2017), producing a starting jet of expanding gas. Expansion-induced cooling leads to condensation of the Argon jet, allowing for optical analysis of gas expansion dynamics using highspeed videos. Gas dynamics (jet spreading and jet inclination) were analysed and correlated to experimental variables.

Originally assigned keywords

Corresponding MSL vocabulary keywords

MSL enriched keywords

Originally assigned sub domains

rock and melt physics

MSL enriched sub domains	analogue modelling of geologic processes geochemistry
Source	http://doi.org/10.5880/fidgeo.2020.034
Source publisher	GFZ Data Services
DOI	10.5880/fidgeo.2020.034
License	CC BY 4.0
Authors	Schmid, Markus 0000-0001-8951-1269 Ludwig-Maximilians-University Munich, Munich, Germany Kueppers, Ulrich Ludwig-Maximilians-University Munich, Munich, Germany Cigala, Valeria 0000-0003-2410-136X Ludwig-Maximilians-University Munich, Munich, Germany Sesterhenn, Jörn 0000-0003-1309-2306 University of Bayreuth, Bayreuth, Germany Dingwell, Donald 0000-0002-3332-789X Ludwig-Maximilians-University Munich, Munich, Germany
References	Schmid, M., Kueppers, U., Cigala, V., Sesterhenn, J., & Dingwell, D. B. (2020). Release characteristics of overpressurised gas from complex vents: implications for volcanic hazards. Bulletin of Volcanology, 82(11). https://doi.org/10.1007/s00445-020-01407-2 10.1007/s00445-020-01407-2 IsSupplementTo Cigala, V., Kueppers, U., Peña Fernández, J. J., Taddeucci, J., Sesterhenn, J., & Dingwell, D. B. (2017). The dynamics of volcanic jets: Temporal evolution of particles exit velocity from shock‐tube experiments. Journal of Geophysical Research: Solid Earth, 122(8), 6031–6045. Portico. https://doi.org/10.1002/2017jb014149 10.1002/2017JB014149 Cites
Contact	Schmid, Markus Ludwig-Maximilians-University Munich, Munich, Germany markus.schmid@min.uni-muenchen.de
Citation	Schmid, M., Kueppers, U., Cigala, V., Sesterhenn, J., & Dingwell, D. (2020). Jet spreading and Jet inclination induced through complex vent geometry [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2020.034