TUFLOW 2D2D BC Advice: Difference between revisions
Content deleted Content added
Chris Huxley (talk | contribs) No edit summary |
Chris Huxley (talk | contribs) No edit summary |
||
Line 41:
'''<u>2D BC "2D" Line Vertex Location and Hidden 1D Node Options'''</u>'''<br>
2d_bc “2D” link line vertices are best located on ridges or embankments, including features that become inundated and drowned out during a simulation. 2d_bc “2D” link line “d” attribute can be used to insert additional hidden 1D nodes between the manually specified
* In regions of
[[File: 2D2D_Guidance_006.JPG |400px]]<br>▼
[[File: 2D2D_Guidance_007.JPG |400px]]<br>
* Model results are less sensitive to the hidden 1D node placement in regions of low velocity (<0.5m/s). Automated placement by using a “d” values greater than 0 is common in this situation. The selected value should be no less than three times the size of the larger cell resolution associated with the 2D/2D boundary. For example, if the model uses a 2.5m and 5m resolution, the “d” attribute should be set no smaller than 15m.<br>
▲[[File: 2D2D_Guidance_006.JPG |400px]]<br>
'''<u>2D BC "2D" Line Storage Multiplier Options'''</u>'''<br>
2d_bc “2D” link line “a” attribute defines the storage allocation to each of the hidden 1D nodes. The default value is 2. Increasing the value may improve stability, though but may unacceptably attenuate results. Sensitivity testing has identified the following recommended maximum values:<br>
* Low velocity area (<0.5m/s): “a” <=3<br>▼
* Moderate to high velocity area (>0.5m/s): “a” <=6<br>
▲* Low velocity area (<0.5m/s): “a” <=3<br>
'''<u>Separate 2D BC “2D” Link Lines'''</u>'''<br>
| |||