Variances in airflows during different ventilation modes in a dynamic U-shaped cave
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F13%3A00068437" target="_blank" >RIV/00216224:14310/13:00068437 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.5038/1827-806X.42.2.3" target="_blank" >http://dx.doi.org/10.5038/1827-806X.42.2.3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5038/1827-806X.42.2.3" target="_blank" >10.5038/1827-806X.42.2.3</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Variances in airflows during different ventilation modes in a dynamic U-shaped cave
Popis výsledku v původním jazyce
Airflow dynamics were studied in Císařská Cave (Moravian Karst, Czech Republic) under different seasonal conditions. The dependence of airflows on the difference between external and cave temperatures is nonlinear and roughly obeys the Darcy-Weisbach equation. The upward airflows were found to be systematically higher than the downward airflows under comparable driving forces. The principle reason is nonlinearity between air temperature and air density. U-shaped cave geometry magnifies this effect by feedback between external temperature and airflow driving forces. Whereas this feedback is positive during the upward airflow ventilation mode, it is negative during the downward airflow mode. To discuss the behavior in detail, a simplified model based onbalancing the masses of two equivalent air columns of different temperatures and densities is proposed. The results contribute to a better understanding of cave microclimate evolution, cave CO2 dynamics, and speleothem growth.
Název v anglickém jazyce
Variances in airflows during different ventilation modes in a dynamic U-shaped cave
Popis výsledku anglicky
Airflow dynamics were studied in Císařská Cave (Moravian Karst, Czech Republic) under different seasonal conditions. The dependence of airflows on the difference between external and cave temperatures is nonlinear and roughly obeys the Darcy-Weisbach equation. The upward airflows were found to be systematically higher than the downward airflows under comparable driving forces. The principle reason is nonlinearity between air temperature and air density. U-shaped cave geometry magnifies this effect by feedback between external temperature and airflow driving forces. Whereas this feedback is positive during the upward airflow ventilation mode, it is negative during the downward airflow mode. To discuss the behavior in detail, a simplified model based onbalancing the masses of two equivalent air columns of different temperatures and densities is proposed. The results contribute to a better understanding of cave microclimate evolution, cave CO2 dynamics, and speleothem growth.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
DD - Geochemie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
Z - Vyzkumny zamer (s odkazem do CEZ)
Ostatní
Rok uplatnění
2013
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
International Journal of Speleology
ISSN
0392-6672
e-ISSN
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Svazek periodika
42
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
8
Strana od-do
115-122
Kód UT WoS článku
000320166200004
EID výsledku v databázi Scopus
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