![Page 1: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/1.jpg)
Aplicaciones de la DinAplicaciones de la Dináámica de mica de Fluidos ComputacionalFluidos Computacional
Marcelo H Marcelo H GarciaGarciaAlatna River, Alaska
Segundo Seminario de PotamologSegundo Seminario de Potamologíía a ““JosJoséé Antonio Maza Antonio Maza ÁÁlvarezlvarez””
RestauraciRestauracióón de rn de rííos para la sustentabilidad os para la sustentabilidad ambientalambiental
Villahermosa, Tabasco, 26 a 28 de Agosto de 2009Villahermosa, Tabasco, 26 a 28 de Agosto de 2009
The Amazon River
Bermejo River, ArgentinaIntroduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 2: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/2.jpg)
To Amazon river
UCAYALI RIVER
Flow
~ 10 Km
~ 25 Km~ 3.5 Km
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 3: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/3.jpg)
Key features – subaerial meandering channel
1. Water super-elevation
2. Natural Secondary flow or helical flowa. Response of flow to local curvatureb. Fully developed secondary flow
3. Steady bed morphology (depositional near inner-bank and erosional near outer-bank)
Water
Air
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
cc RH
gHU
RHFrSt
22==
![Page 4: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/4.jpg)
Response to local curvature and development of the natural secondary flow
~S2
~S4
~S6
~λd
0≈∂∂s
sn
Inner bank Outer bank
B
Inner bankOu
ter
ban
k
![Page 5: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/5.jpg)
E ASTE AST
WESTWEST
VV11
VV44
VV33
VV22
F lo w m e te rF lo w m e te r
P umpP umpCS0
0CS0
0CS1
0CS1
0
C S 15
C S 15
CS20
CS20 CS3
0CS3
0
sk e we d
sk e we d
°=1100θ
mc 10~λ
2B=0.60mHc=0.40m
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 6: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/6.jpg)
HTR
IP
CCG
Abad and Garcia (2009a)
![Page 7: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/7.jpg)
Near Amazon river, Brazil(1)
In nature: Transitional secondary flows
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 8: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/8.jpg)
Randal Dinehart
Real bed morphology (bedforms)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 9: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/9.jpg)
Parsons et al. (2005)
Real bed morphology (bedforms)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 10: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/10.jpg)
A
AA-A
δ
gas (φ<0.5)
liquid (φ>0.5)
5.0=φ (free surface)
real boundarynumerical boundary
� Finite element method (FEM), k- ε turbulence model, Unstructured mesh, Parallelizatio n with MPI, mesh partitioning with ParMETIS, parallel matrix solver with PETSc, LSM
![Page 11: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/11.jpg)
Shedding bedforms
Abad and Garcia (2009b)Abad et al. (2009)
Real bed morphology (bedforms)
![Page 12: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/12.jpg)
Using tetrahedral elements (only showing the triang les at the bed)
Hypothesis 1 Hypothesis 2 Hypothesis 3 Interpretation/Conclusions Future Research
![Page 13: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/13.jpg)
Upstream conditionT = 1hr
![Page 14: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/14.jpg)
RVR Meander:RVR Meander:
A A linearizedlinearized model for model for meandering migration for largemeandering migration for large --spatial scalesspatial scales
Abad and Garcia (2006)Abad and Garcia (2006)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 15: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/15.jpg)
RVR Meander was developed using Visual C++, ArcObjects library
•Non-cohesive sediment• Quasi-steady condition
• Channel width is constant• Vertical banks• Bank erosion E (excess velocity)
RVR Meanderstand-alone
RVR Meanderfor GIS
(1) Pre-processing(2) Characterization of meandering rivers, (3) Planform migration
RVRMeander.exe
ArcGIS91RVRMeander.dll
RVR Meander (http://vtchl.uiuc.edu/our-work/software/rvrmeander/ )
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 16: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/16.jpg)
Enhancement of Enhancement of Conceptual modelConceptual model
Statistical analysis
Start
Input centerlines
Selection
End
River migration
Results
Statistical analysis module: requires 3 centerlines (t1, t2, valley)
River migration module: requires only one centerline (t1)
Input data : Initial curvature and perturbation velocity, α, Q, B, ds, #years, # iterations, EoInput data : Lag
time between t1 and t2, λmeander
Statistical analysis module : GUI showing parameters (Avg. shift, Sinuosity, Curvature, among other)
River migration module : GUI showing values of planform migration and drawing a new object ( Windows-based: polyline entity, GIS-based: shape file). Results can also be exported as ASCII file
Pre-processing
Characterization of rivers Planform evolution
RVR Meander flow chart
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 17: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/17.jpg)
∑=
=
−=
4
1
1,)(
j
j
jji ssx α
∑==
−=
4
1
1,)(
j
j
jji ssy β
Guneralp & Rhoads (2006), Fagherazzi et al. (2004)
Parametric Cubic Splines
RVR Meander pre-processing tool (cubic splines and filtering)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 18: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/18.jpg)
RVR Meander migration model
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 19: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/19.jpg)
RVR Meander : Bermejo River RVR Meander : Bermejo River ApplicationApplication
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 20: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/20.jpg)
2005
Bermejo River
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 21: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/21.jpg)
1972
2000 2005
1989Puente Lavalle Puente Lavalle
Puente Lavalle Puente Lavalle
Bermejo River
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 22: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/22.jpg)
Puente Lavalle
Bermejo River: Upstream effect
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 23: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/23.jpg)
Puente Lavalle
Bermejo River: Downstream effect
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 24: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/24.jpg)
Possible cutoff
Bridge Lavalle
Bermejo River
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 25: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/25.jpg)
___ 2005 January
___ 2005 August
Bridge Lavalle
Q = 1500 m3/s
_ _ Valley
Valley 1.1120372005 Jan 1.4770252005 Aug 1.555021Average-stream 1.516023Average-change 0.155993
Sinuosity
Averaged-Valley 0.001473Averaged-2005Jan 0.000611Averaged-2005Aug 0.000626Averaged-changed Valley
0.000619
Curvature
Averaged Absolute Normal 128.9875Averaged Absolute Transversal 79.91783Averaged Absolute Longitudinal 84.7112Shift ratio (tras/long) 0.943415Averaged Transversal -79.9178Averaged Longitudinal 30.80746Area reworked 195.5481
Shift
Bermejo River
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 26: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/26.jpg)
If Lup < Lds� Upstream skewedIf Lup > Lds� Downstream skewed
Bermejo River: Migration between Jan 2005 to Aug 2005
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 27: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/27.jpg)
1) External boundary condition imposed by Lavalle bridge (Abad et al., 2006, Congreso Latinoamericano de Hidraúlica, Venezuela)
The case of freely meandering rivers
The case of the Bermejo River
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 28: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/28.jpg)
1) External boundary condition imposed by Lavalle bridge (Abad et al., 2006, Congreso Latinoamericano de Hidraúlica, Venezuela)
The case of self-formed meandering rivers (Christian A. Braudrick and Bill Dietrich)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 29: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/29.jpg)
1) External boundary condition imposed by Lavalle bridge (Abad et al., 2006, Congreso Latinoamericano de Hidraúlica, Venezuela)
Experiments of self-formed meandering channels (Christian A. Braudrick and Bill Dietrich)T = 4 minutes, Q = 0.5 L/s T = 94 minutes, Q = 1.5 L/s T = 3.5 hours, Q = 0.76 L/s
T 10.8 hours, Q = 0.76 L/s T = 12.6 hours, Q = 1.5 L/s T = 13.5 hours, Q = 0.76 L/s
dλ dλdλ
dλ dλ dλ
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 30: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/30.jpg)
CFD application to bank CFD application to bank erosion control erosion control –– a reacha reach --scale problemscale problem
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 31: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/31.jpg)
Sustainable Erosion ControlInstalling Willow Hurdles to Prevent Riverbank Erosion
- SW Londonhttp://www.slimwetwillows.co.uk/erosion.htm
Gabions
THE WES STREAM INVESTIGATION AND STREAMBANK STABILIZATION HANDBOOK
Surface armor
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
Riverbank erosion control: direct methods
![Page 32: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/32.jpg)
(a) Palisades (b) Impermeable dikes
http://www.seamentshorelinesystem.com/groins.html
THE WES STREAM INVESTIGATION AND STREAMBANK STABILIZATION HANDBOOK, 1997
(c) Board Fence Retard
(d) Jack field (retard) (e) Bendway Weirs on Harland CreekSUBMERGED VANES
Riverbank erosion control: indirect methods
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 33: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/33.jpg)
Brookside farm (Sugar creek)Brookside farm (Sugar creek)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 34: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/34.jpg)
Field measurements: Brookside farm (Sugar creek)
S1
S3S6 S4S7
S2
S8
S5
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 35: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/35.jpg)
Low-, medium- and high-flow conditions: Velocity mag nitude
Weir4Weir4Weir3Weir3Weir2Weir2Weir1Weir1
Weir5Weir5
Block 3
Weir4Weir4Weir3Weir3
Weir4Weir4Weir3Weir3
Weir4Weir4Weir3Weir3
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 36: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/36.jpg)
Near-bed U*: (a) Low-,(b) medium-,(c) high-flows
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 37: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/37.jpg)
Helical flow in a bend
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 38: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/38.jpg)
Secondary flow at Low-, medium- and high-flows
[4][4]
[4][4]
[4][4]
INNER BANKINNER BANKOUTER BANKOUTER BANKWeir4Weir4
Weir3Weir3
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 39: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/39.jpg)
Low flow: Weir 3 Stagnation line
Stagnation line
Stagnation line
WEIR 3Weir4Weir4
Weir3Weir3
Weir4Weir4
Weir3Weir3
Weir4Weir4Weir3Weir3
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 40: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/40.jpg)
Validation Section 4 – Low-flow condition
][ ][][][iMEAj
iMODj
iCOMj VVV −=
MEASURED MODELED DIFFERENCE
S1
S3S6 S4S7
S2S8
S5
BBW1
BBW2
BBW3BBW4
BBW5
(using k-e model)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 41: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/41.jpg)
Shear layer and free surface
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 42: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/42.jpg)
Near bed shear velocity (m/s)α = 90° (LES modeling)
α = 40° (LES modeling)
Introduction Background RVR Meander/Bermejo river Applications/BBW General Conclusions
![Page 43: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/43.jpg)
Three-dimensional Hydrodynamics and Water Quality Modeling of the Chicago River, IL
Xiaofeng Liu, Sumit Sinha, Nahil Sobh, Marcelo H. Garcia
![Page 44: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/44.jpg)
Chicago River
![Page 45: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/45.jpg)
![Page 46: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/46.jpg)
![Page 47: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/47.jpg)
![Page 48: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/48.jpg)
![Page 49: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/49.jpg)
![Page 50: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/50.jpg)
![Page 51: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/51.jpg)
Simulation Results for DO at 36th Street
0
2
4
6
8
10
12
14
12/24/2007 1/3/2008 1/13/2008 1/23/2008 2/2/2008 2/12/2008 2/22/2008 3/3/2008 3/13/2008
Date
DO
(m
g/l)
36th Street Avg
36th Street Layer 1
36th Street Layer 2
36th Street Layer 3
36th Street Layer 4
Measurement
DO Depletions
CSO Events
![Page 52: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/52.jpg)
Objectives Bubby Creek The models CSO event “Purification” Conclusions
Bubbly Creek, Chicago
Regimes� dry periods: no flow� heavy storms: Combined Sewer Overflow (CSO)
![Page 53: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/53.jpg)
Objectives Bubby Creek The models CSO event “Purification” Conclusions
CSO event -“Phase 1”
Model: 2-D depth-averaged STREMR-HySedWq
Flowdirection
Phase 1
![Page 54: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/54.jpg)
Objectives Bubby Creek The models CSO event “Purification” Conclusions
CSO event - “Phase 1” – Hydrodynamics
![Page 55: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/55.jpg)
After 7.66 hours After 7.66 hoursObjectives Bubby Creek The models CSO event “Purification” Conclusions
“Phase 1” – Transport of sediments and water quality
![Page 56: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/56.jpg)
Objectives Bubby Creek The models CSO event “Purification” Conclusions
“Purification” scenariosSCENARIO 1: flow recirculation of 50 MGD (2.19 m3/s), northward flow in the creek Summer or after CSO event scenario; abstraction of daily fluctuation due to photosynthesis and respiration.� BOD: oxidation and settling � BOD concentration decreases; � DO: oxidation and sediment oxygen demand (SOD) from the bed � DO concentration decreases; reaeration from the atmosphere � DO concentration increases.
![Page 57: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/57.jpg)
Objectives Bubby Creek The models CSO event “Purification” Conclusions
“Purification” scenarios (contd.)SCENARIO 2: flow recirculation (northward flow in the creek) plus supplemental aeration (1.31 g/s) in one location in the creekSCENARIO 3: flow recirculation (northward flow in the creek) plus supplemental aeration (1.31 g/s) in the recirculation pipe
![Page 58: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/58.jpg)
Jackson et al.Science of the Total Environment
Evidence of Density Current at Confluence by Field Measurement
![Page 59: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/59.jpg)
ADCP Uplooker Measurement at the Upstream of the Junction Shows Density Current due to CSO
![Page 60: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/60.jpg)
CSO Event of 01/08/2008
CSO Event of 02/17/2008
![Page 61: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/61.jpg)
� Influence factors– Main channel discharge– CSO discharge– CSO particle concentration
![Page 62: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/62.jpg)
![Page 63: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/63.jpg)
![Page 64: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/64.jpg)
![Page 65: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/65.jpg)
![Page 66: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/66.jpg)
Case 1
Case 2
Case 3
Case 4
Case 5
Case 6
Case 7
![Page 67: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/67.jpg)
Qcso=35 m3/s
Effects of Main Channel Flow Discharge
0200400600800
10001200140016001800
0 5 10 15 20 25 30Main Channel Normal Flow (m3/s)
Fron
t Loc
ation
(m)
0
200
400
600
800
1000
Plun
ging P
oint (
m)
Front Location (m)Plunging Point (m)
0
0.005
0.01
0.015
0.02
0.025
0 5 10 15 20 25 30
Main Channel Normal Flow (m3/s)
Fron
t Slop
e
![Page 68: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/68.jpg)
Comentarios Finales
� En la ultima decada se han logrado grandes avances en la hidrodinamica computacional con aplicaciones en la hidraulica ambiental fluvial, ambiental y la morfodinamicade rios.� Es necesario complementar la modelacion numerica con
experimentos de laboratorio y observaciones de campo parapoder calibrar, verificar y validar los resultados numericos.� La modelacion numerica no es una panacea sino una
herramienta mas a disposicion de la ingenieria ambiental y fluvial que se debe utilizar con cautela, sentido comun, y sabiendo cuales son sus alcances y limitaciones.
![Page 69: Aplicaciones de la Dinámica de Fluidos Computacional Marcelo H](https://reader036.vdocuments.co/reader036/viewer/2022081723/586413891a28ab0e30927658/html5/thumbnails/69.jpg)
Gracias
Racine Avenue Pumping Station, Chicago Illinois