Tuflow and estry manual Version 3

3.11.6Multiple 2D Domains

Any number of 2D domains of different cell size and orientation can be combined to form one model. The 2D domains can be linked by 1D domains, with 2D/2D linking under development and planned for a future release. For example, a 1D domain of a river system may have several 2D domains embedded to represent several townships where a more detailed analysis is required. The combination of 1D and 2D domains forms one overall model. Direct 2D to 2D linking can be achieved by connecting the 2D domains via one or more single 1D nodes as an interim measure before the 2D/2D linking option is available.

As of Build 2005-05-AN, the feature has undergone successful testing and application. It is, however, still regarded as under development, with slight changes to some commands possible. To have access to multiple 2D domains requires having the Multiple 2D Domains Module (visit www.tuflow.com).

To specify more than one 2D domain use Start 2D Domain and End 2D Domain in the .tcf file to start and end blocks of commands applicable for each 2D domain. The mandatory .tcf commands that occur within a 2D domain block are Geometry Control File and BC Control File. Other commands that may be used are Set IWL; Read MI FC; Read MI GLO; Read MI IWL; Read MID IWL; Read MI LP; Read MI PO; Instability Water Level. As of Build 2005-05-AN, Timestep can be used inside a block to specify a different timestep for different 2D domains.

An example of using 2D domain blocks is given below.

# This is an example of a simple .tcf file with multiple 2D domains

MI Projection == ..\model\mi\Projection.mif

Start 2D Domain == East Domain

BC Control File == ..\model\east domain.tbc

Geometry Control File == ..\model\east domain.tgc

Timestep (s) == 10

Set IWL == 1

End 2D Domain

Start 2D Domain == West Domain

BC Control File == ..\model\west domain.tbc

Geometry Control File == ..\model\west domain.tgc

Timestep (s) == 5

Set IWL == 1

End 2D Domain

Estry Control File Auto
Start Time (h) == 0.

End Time (h) == 12.

Bed Resistance Values == MANNING N # Manning’s n formulation used

Read Materials File == ..\model\n_values.tmf ! .tmf is for Tuflow Materials File