Hallo,
I build a model which has a river confluence and I hope can be solved with Nays2DH solver.
According to Nays2DH Solver manual p.28, there is possibility to create a tributary inflow schematic with 2 inflows
(main channel and tributary channel).
My model, typically has same river schematic as described on p.28 (Type A), but I couldn’t get some information how to create computational grid like that.
Can anybody tell me, how to generate a Type A mesh with Nays2DH solver ?
Thank’s…
コメント
Currently, the iRIC does not have nice and flexible functions for generating structured-type computational grids for river confluence simulations. Alternately, you will generate the computational grid using different software and import the grid into the iRIC. The iRIC can import several types of file format for computational grid. You will see one example below,
https://iric-gui-user-manual.readthedocs.io/en/latest/06/07_grid_csv.html
Also, the model, which adopts the structured grid system, like Nays2DH has some problems to perform the flow and bed evolution simulation at river confluence since the grid system is not flexible enough. You can also use the model which uses unstructured grid system. Sometime it will be more better choice for river confluence calculations.
Thank you for the clarification.
I have one question about the unstructured grid model; does Nays2DH support unstructured grid?
I appreciate your reply.
Best regards.
Hi SK
Unfortunately Nays2DH does not support unstructured grids.
However, iRIC also has 2D analysis models other than Nays2DH. Models that support unstructured grids include SToRM, River2D, and Mflow_02.
There is a spreadsheet that organizes iRIC solvers, so please check it out.
https://docs.google.com/spreadsheets/d/18LuJhAvfY4kTBprqxJObwMQaDLzonuAenQLcG9jI4mI/edit?usp=sharing
Hi KeitaHoshino,
Thank you very much for your reply and spreadsheet.
Hi KeitaHoshino,
please kindly share, if you have any guidance/material about mesh construction (width/length ratio….) for iRIC. and also how to control sudden overestimation of velocity, erosion/deposition and depth.
Your reply is highly appreciated.
Hi SK
I know there is material here.
https://i-ric.org/download/iric-notes/
However, this is a Japanese document. . .
Please read while translating. There are many diagrams, so I think you can understand intuitively.
If I find any good material in English in the future, I will share it on this forum. I’m not a Nays2DH professional, so I’m sorry that I only have this much information.
Hi KeitaHoshino,
Thank you, the document will help much.
thank you once again for reply.