- Tytuł:
-
Granica laminarnego przepływu wody w obsypce żwirowej studni eksploatacyjnej
The boundary of the laminar water flow in the filter pack of a pumping well - Autorzy:
-
Matyka, M.
Mądrala, M. - Powiązania:
- https://bibliotekanauki.pl/articles/2075640.pdf
- Data publikacji:
- 2017
- Wydawca:
- Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
- Tematy:
-
obsypka żwirowa
pompy wodne
przepływ w ośrodku porowatym
matoda LBM
numer uczestnictwa
filter packs
water wells
pore-scale flow
Lattice Boltzmann Method
participation number - Opis:
- Structural changes of aquifers, resulting from a higher velocity of water entering a screen, may occur in the zone around wells ’ screen. Well discharge rate equations assume a laminar flow and agreement with the Darcy s law. Thus, the admissible velocity of water entering the screen should not exceed a certain limit. In this research, the microstructure of water flow velocity in the well s filter pack was studied. We took a picture of the internal structure of the aquifer s pore media in an in situ undisturbed soil sample. Because of the lack of a clear definition of the characteristic length scale in the Reynolds number, we propose to use additionally n - a dimensionless value describing the distribution of kinetic energy in the system - as a criterion for changing the flow nature. We based the study on numerical simulations offluid flow in pore space. We used the Lattice-Boltzmann Method (LBM) to simulate water flow in the filtered zone. We find that in a real porous system of the filter pack with a porosity of n = 0.49, as opposed to highly porous material at n = 0.9, the values of n increase with the decreasing and increasing Reynolds number. The distribution of the velocity field in the analyzed sections also shows the formation ofprivileged waterflow paths and the formation ofvortex structures for high flow velocities.
- Źródło:
-
Przegląd Geologiczny; 2017, 65, 11/2; 1334--1338
0033-2151 - Pojawia się w:
- Przegląd Geologiczny
- Dostawca treści:
- Biblioteka Nauki
Artykuł