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Showing results for tags '2d_bc'.
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I've set up downstream boundaries in GPU models a number of times now using a 2d_bc HT boundary where a fixed water level below ground level is used. According to the documentation, this causes the model to apply 'normal flow' at this point, effectively behaving as an automatic HQ boundary. However, the results usually look like water is simply pouring out of the boundary, with water level and depth decreasing as they approach the boundary. This does not look like normal flow as I would have expected it and can have effects quite some distance upstream. The attached image illustrates the point. Is someone able to expand on how exactly this boundary works?
We are currently reviewing an ESTRY/TUFLOW model and the question has come up when should a modeller be using 2d_bc_hx, or 2d_bc_hxe and 2d_bc_hxi. As on this occasion the modeller has chosen to use 2d_bc_hxi thorough out the model and now has several hundred "Check 2231" messages, we know this occurs because there are no zpt points on some of the HXi lines. So the questions we have are: When do we use these different hx types?What the benefits of each type? Thanks Fil
Hi All, I have done some test runs of rain on grid model by using GPU, the details are: Boundary condition – 2d_bc HT type (statics tail water) Run1 - 5m cell size Run2 - 3m cell size Run3 – 2m cell size All runs are same except change cell size in TGC file When checking the water level at the location near boundary, it was found that the results show the level is dropping after peak for 3m and 5m cell size model runs. However the level for 2m cell size model is continually increasing, it seems the 2d_BC is not functioning. see attached file for more inforamtion. Appreciated that someone can help. Regards Hai CGPU check.pdf