Three-dimensional Numerical Analysis of Air Entrapment Effects during Recurrent Ponded Infiltration Experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00199098" target="_blank" >RIV/68407700:21110/12:00199098 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Three-dimensional Numerical Analysis of Air Entrapment Effects during Recurrent Ponded Infiltration Experiment

Popis výsledku v původním jazyce

The use of nuclear magnetic resonance (MR) and X-ray computed tomography (CT) scanning is now well established in soil science and subsurface hydrology. Recurrent ponded infiltration test was performed on small undisturbed soil sample and further complemented with the MR and CT scanning techniques. The experiment reveals complex water regime accompanied with air entrapment effects. The decrease of the steady state flow rate during the second infiltration run, hypothesized to be caused by entrapped air with subsequent blockage of the large pores, was observed. In this study, distribution of entrapped air and its impact on water flow was studied through a novel combination of MR imaging and numerical modeling. CT-derived hydraulic properties was implemented via scaling factors of hydraulic conductivity and water content into the three-dimensional (3D) water flow model based on Richards' equation. MR relaxometry data were used to derive 3D maps of entrapped air. Simulation results were co

Název v anglickém jazyce

Three-dimensional Numerical Analysis of Air Entrapment Effects during Recurrent Ponded Infiltration Experiment

Popis výsledku anglicky

The use of nuclear magnetic resonance (MR) and X-ray computed tomography (CT) scanning is now well established in soil science and subsurface hydrology. Recurrent ponded infiltration test was performed on small undisturbed soil sample and further complemented with the MR and CT scanning techniques. The experiment reveals complex water regime accompanied with air entrapment effects. The decrease of the steady state flow rate during the second infiltration run, hypothesized to be caused by entrapped air with subsequent blockage of the large pores, was observed. In this study, distribution of entrapped air and its impact on water flow was studied through a novel combination of MR imaging and numerical modeling. CT-derived hydraulic properties was implemented via scaling factors of hydraulic conductivity and water content into the three-dimensional (3D) water flow model based on Richards' equation. MR relaxometry data were used to derive 3D maps of entrapped air. Simulation results were co

Druh

O - Ostatní výsledky

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

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Projekt

<a href="/cs/project/GA103%2F08%2F1552" target="_blank" >GA103/08/1552: Proudění vody a transport rozpuštěných látek v pórovitém prostředí za přítomnosti nespojité plynné fáze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů