slide1 n.
Download
Skip this Video
Download Presentation
B. Noël, Soares S., Y. Zech Université catholique de Louvain

Loading in 2 Seconds...

play fullscreen
1 / 31

B. Noël, Soares S., Y. Zech Université catholique de Louvain - PowerPoint PPT Presentation


  • 121 Views
  • Uploaded on

WP3 : Flood Propagation Computation On The ‘Isolated Building Test Case’ And The ‘ Model City Flooding Experiment ’. B. Noël, Soares S., Y. Zech Université catholique de Louvain. Overview. Numerical Model The ‘Isolated Building Benchmark’ Numerical modelling Numerical results

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'B. Noël, Soares S., Y. Zech Université catholique de Louvain' - makala


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

WP3 : Flood PropagationComputation On The ‘Isolated Building Test Case’ And The ‘Model City Flooding Experiment ’

B. Noël, Soares S., Y. Zech

Université catholique de Louvain

overview
Overview
  • Numerical Model
  • The ‘Isolated Building Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
  • The ‘Model City Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
overview1
Overview
  • Numerical Model
  • The ‘Isolated Building Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
  • The ‘Model City Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
numerical model
Numerical Model
  • 2D finite-volume method
  • First-order scheme
  • Flux evaluated by Roe’s scheme
  • Non-Cartesian grids allowed

‘Soares Frazão S., 2002 PHD Thesis ’

overview2
Overview
  • Numerical Model
  • The ‘Isolated Building Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
  • The ‘Model City Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
the isolated building benchmark

Square meshes

Quadrangular meshes

The ‘Isolated Building Benchmark’
  • Numerical modelling (2-mesh grid)
    • Grid :
the isolated building benchmark1
The ‘Isolated Building Benchmark’
  • Numerical modelling
    • Building neighbouring
the isolated building benchmark2
The ‘Isolated Building Benchmark’
  • Numerical modelling
    • Grid mean size : 5 x 5 cm
    • CFL number : 0.9
    • Time duration : ± 2 h
    • CPU : AMD XP1800+ (128Mb)
the isolated building benchmark4
The ‘Isolated Building Benchmark’
  • Numerical results
    • Water level :
the isolated building benchmark5
The ‘Isolated Building Benchmark’
  • Numerical results
    • Water level (t = 10 s) :
the isolated building benchmark6
The ‘Isolated Building Benchmark’
  • Numerical results
    • Velocity field (t = 5 s) :

Numerical

Experimental

Noël, Spinewine 2003 - UCL

the isolated building benchmark7
The ‘Isolated Building Benchmark’
  • Numerical results
    • Velocity Intensity (t = 5 s) :

Numerical

Experimental

Noël, Spinewine 2003 - UCL

the isolated building benchmark8
The ‘Isolated Building Benchmark’
  • Sensitivity analysis
    • Manning roughness coefficient
the isolated building benchmark9
The ‘Isolated Building Benchmark’
  • Sensitivity analysis
    • Initial downstream water-depth
overview3
Overview
  • Numerical Model
  • The ‘Isolated Building Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
  • The ‘Model City Benchmark’
    • Numerical modelling
    • Numerical results
    • Sensitivity analysis
the model city benchmark
The ‘Model City Benchmark’
  • Numerical modelling (channelled)

Mesh XXX

the model city benchmark1
The ‘Model City Benchmark’
  • Numerical modelling (10-mesh grid)

Mesh XXX

the model city benchmark2
The ‘Model City Benchmark’
  • Numerical modelling (original)

Mesh XXX

the model city benchmark3
The ‘Model City Benchmark’
  • Numerical modelling (10-mesh grid)
the model city benchmark4
The ‘Model City Benchmark’
  • Numerical modelling
    • Topography reconstruction
the model city benchmark5
The ‘Model City Benchmark’
  • Numerical modelling
    • Upstream reservoir
      • Dimensions : unknown but seen on picture

 about 1 meter of longitudinal length

 lateral bed level similar to the bed level of upstream end of channel

      • Best way to model : decrease bed level of feeding tank and fill it with water at rest  numerical crash at corner of reservoir
the model city benchmark6

Walls

Inlet

Walls

The ‘Model City Benchmark’
  • Numerical modelling
    • Upstream reservoir
      • bed level of the upstream end of channel
      • Inlet introduced at the upstream end of the prolonged channel
the model city benchmark7
The ‘Model City Benchmark’
  • Numerical modelling
    • Grid mean size : 2.5 x 2.5 cm
    • CFL number : 0.1
    • Time duration : ± 5h.
    • Computer : AMD XP1800+ (128Mb)
the model city benchmark8
The ‘Model City Benchmark’
  • Numerical results
    • Test cases 1a & 1b (t = 20 s) :

Staggered layer :

- velocity decreased

- water level increased in the building layer

the model city benchmark9
The ‘Model City Benchmark’
  • Numerical results
    • Test cases 2a & 2b (t = 20 s) :

Staggered layer :

- velocity decreased

- water level increased in the building layer

the model city benchmark10
The ‘Model City Benchmark’
  • Numerical results
    • Test cases 3a & 3b (t = 20 s) :

Low inflow :

60 l/s

High inflow :

100 l/s

the model city benchmark11
The ‘Model City Benchmark’
  • Numerical results
    • Test cases 4a & 4b (t = 20 s) :

Buildings as bed elevation (15 cm):

the model city benchmark12
The ‘Model City Benchmark’
  • Numerical results
    • Test cases 4a & 4c (t = 20 s) :

High friction

(n = 10 s/m1/3):

- water lost in buildings

- maximum water level moves downstream and is a few decreased

the model city benchmark13
The ‘Model City Benchmark’
  • Sensitivity analysis
    • Downstream boundary condition
slide31

WP3 : Flood PropagationComputation On The ‘Isolated Building Test Case’ And The ‘Model City Flooding Experiment ’

B. Noël, Soares S., Y. Zech

Université catholique de Louvain

ad