Methane Bubble Evolution and Dissolution in Freshwater Lake

0451102 - ÚCHP 2016 DE eng C - Konferenční příspěvek (zahraniční konf.)
Stanovský, Petr - Kordač, M. - Štiková, L. - Orvalho, Sandra
Methane Bubble Evolution and Dissolution in Freshwater Lake.
Book of Abstracts. Ozarow Mazowiecki: Nobell Compressing sp. z o.o, 2015 - (Kosinsky, K.; Urbanczyk, M.; Žerko, S.). ISBN N.
[International Workshop on Bubble and Drop Interfaces 2015 /6./. Potsdam (DE), 06.07.2015-10.07.2015]
Grant CEP: GA ČR GAP504/12/1186
Institucionální podpora: RVO:67985858
Klíčová slova: bubble ebullition * mass transfer * freshwater lakes
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

Gasses produced by sediments in freshwater lakes influence the ecosystem of the lakes and amount of methane emitted through an ebullition is considered as significant source in global carbon cycle. A model is formulated to allow assessment of methane release via ebullition based on easily accessible data from hydroacoustic survey, which provide information about bubble size distribution and their number density along the lake. Mass transfer of methane, carbon dioxide, oxygen and nitrogen is taken into account as well as their vertical concentration profiles and temperature distribution through a water column. Review of available models for bubble drag coefficient and mass transfer coefficients for single bubble experiments was made and the best available was integrated into the model presented. It is remarkable, that naturally present surface active substances does play only minor role in mass transfer of gases within water body due to fast volume expansion of bubbles.
Trvalý link: http://hdl.handle.net/11104/0252317