Aleksandra Zieminska Stolarska Analysis of Flow
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ALEKSANDRA ZIEMIŃSKA-STOLARSKA, e-mail: [email protected], phone: 42 6313791, Andrzej Polanczyk, Ireneusz Zbicinski LODZ UNIVERSITY OF TECHNOLOGY, FACULTY OF PROCESS AND ENVIRONMENTAL ENGINEERING, 90-924 ŁÓDŹ, WÓLCZAOSKA 213 STR. Sulejow Reservoir situated in central Poland in the middle reach of the Pilica River is a typical lowland, low volume wa- ter body with major fluctuations of water level. Study area Study area Study area—Sulejow Reservoir Sulejow Reservoir Sulejow Reservoir Abstract Abstract Abstract 3D hydrodynamic model of the Sulejow Reservoir based on the real data was developed, verified and tested. CFD ( Computational Fluid Dynamics) calculations of the flow in the reservoir were performed for monthly hydrodynamic and meteorological conditions using the ANSYS Fluent 14.0 software. A hexahedral mesh with over 16 million elements and k-ω SST turbulence model was applied for single-phase simulations in steady-state conditions to determine mean hydrodynamic parameters in every month of the reference year. CFD model of the lake was validated on the basis of flow velocity measurements. 3D geometry was constructed by using GAMBIT 2.2.30 software. The domain surface was discretized using hexahedral (structural) mesh with approx. 16 700 000 elements. Moving boat Acoustic Doppler current profilers (ADCP) (Fig. 4). measurements provided spatially picture of flow conditions in the Sulejow Reservoir The velocity fields were measured at 4 cross- sections. Fig. 4. Acoustic Doppler current profilers (ADCP). Segmentation technique, based on 36 cross sections profiles of the was applied. Final verification of the accuracy of the reservoir shape was feasible on the basis of satel- lite photograph of the object. (Fig. 2). Flow field in the Sulejow Resvoir is transient in nature, containing turbu- lent structures and swirl flows. (Fig. 5) Three regions of swirling flow were developed. One around the islands (place of the constrictions), one below the Pilica inlet due to the small depth (0,3 m) and higher velocity (12,83 m 3 /s - June; 25,65 m 3 /s - December) and one below the outlet of the reservoir. Computational model Computational model Computational model Parameters, Boundary & Initial Conditions Parameters, Boundary & Initial Conditions Parameters, Boundary & Initial Conditions Validation of the model Validation of the model Validation of the model Boundary conditions applied for the domain were: two inlets (Pilica and Luciaza rivers), one outlet (dam). At the water table the moving wall function was used, which enables si- mulations under wind conditions. Calculation were provided under steady-state conditions, for single phase using ANSYS FLUENT software. Results Results Results Analysis of flow hydrodynamics in the Sulejow Reservoir Fig. 5. Velocity field (m/s) in the Sulejow Reservoir in A)December B) June.
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Transcript of Aleksandra Zieminska Stolarska Analysis of Flow
ALEKSANDRA ZIEMIŃSKA-STOLARSKA, e-mail: [email protected], phone: 42 6313791, Andrzej Polan czyk, Ireneusz Zbicin ski
LODZ UNIVERSITY OF TECHNOLOGY, FACULTY OF PROCESS AND ENVIRONMENTAL ENGINEERING, 90-924 ŁÓDŹ, WÓLCZAOSKA 213 STR.
Sulejow Reservoir situated in central Poland in the middle
reach of the Pilica River is a typical lowland, low volume wa-ter body with major fluctuations of water level.
Study areaStudy areaStudy area———Sulejow ReservoirSulejow ReservoirSulejow Reservoir
AbstractAbstractAbstract
3D hydrodynamic model of the Sulejow Reservoir based on the real data was developed, verified and tested. CFD (Computational Fluid Dynamics) calculations of the flow in the
reservoir were performed for monthly hydrodynamic and meteorological conditions using the ANSYS Fluent 14.0 software. A hexahedral mesh with over 16 million elements and k-ω SST turbulence model was applied for single-phase simulations in steady-state conditions to determine mean hydrodynamic parameters in every month of the reference year. CFD model of the lake was validated on the basis of flow velocity measurements.
3D geometry was constructed by using GAMBIT 2.2.30
software. The domain surface was discretized using hexahedral (structural) mesh with approx. 16 700 000 elements.
Moving boat Acoustic Doppler current profilers (ADCP) (Fig. 4).
measurements provided spatially picture of flow conditions in the Sulejow Reservoir The velocity fields were measured at 4 cross-sections.
Fig. 4. Acoustic Doppler current profilers (ADCP).
Segmentation technique, based on 36 cross sections profiles of the was applied. Final verification of the accuracy of the reservoir shape was feasible on the basis of satel-lite photograph of the object. (Fig. 2).
Flow field in the Sulejow Resvoir is transient in nature, containing turbu-
lent structures and swirl flows. (Fig. 5) Three regions of swirling flow were developed. One around the islands (place of the constrictions), one below the Pilica inlet due to the small depth (0,3 m) and higher velocity (12,83 m3/s - June; 25,65 m3/s - December) and one below the outlet of the reservoir.
Computational modelComputational modelComputational model
Parameters, Boundary & Initial ConditionsParameters, Boundary & Initial ConditionsParameters, Boundary & Initial Conditions
Validation of the modelValidation of the modelValidation of the model
Boundary conditions applied for the domain were: two inlets (Pilica
and Luciaza rivers), one outlet (dam). At the water table the moving wall function was used, which enables si-mulations under wind conditions.
Calculation were provided under steady-state conditions, for single phase using ANSYS FLUENT software.
ResultsResultsResults
Analysis of flow hydrodynamics in the Sulejow Reservoir
Fig. 5. Velocity field (m/s) in the Sulejow Reservoir in A)December B) June.
