slide1
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


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