[LMD]

I want to know if the following two settings are equivalent？

setting 1:
control.txt:
...
B 10 0.0 40.0 0.0 0.04 0.0 1.0 //rectangular domain size

S 61 11.0 17.0 0.0 0.04 0.0 0.3 //wedge object in x-direction
S 10 17.0 19.0 0.0 0.04 0.0 0.3 //rectangular object
S 61 19.0 22.0 0.0 0.04 0.3 0.0
...
ctrl.txt:
...
F 60 0.4 // still water depth
...

setting 2:
...
B 10 0.0 40.0 0.0 0.04 0.0 1.0 //rectangular domain size, not modified

S 10 0.00 40.0 0.0 0.04 0.0 0.1 //add rectangular object
S 61 11.0 17.0 0.0 0.04 0.1 0.4 //wedge object in x-direction, modified
S 10 17.0 19.0 0.0 0.04 0.1 0.4 //rectangular object, modified
S 61 19.0 22.0 0.0 0.04 0.4 0.1 //modified
...
ctrl.txt:
...
F 60 0.5 // still water depth, modified
...


I want to set up an undulating bar at the bottom. My idea was to set up a rectangular soild at the bottom and increase the water depth, if it works the results of two settings mentioned above should be same(for convenience, I used the example "Wave propagation over a submerged bar" in FNPF). However, there seems to be a phase difference between the results of these two settings above, so I'm not sure if this approach is feasible.

Attach Files are the bottom I want to set (actually more complex，may require geo) and results of two settings above.

Thank you

[valgrinda]

Dear Xu Hui,

the settings should be equivalent, but for the sigma coordinate system I would prefer the first version.

[LMD]

Originally Posted by valgrinda

Dear Xu Hui,

the settings should be equivalent, but for the sigma coordinate system I would prefer the first version.

Thank you sir,

If I want to set up an undulating bar at the bottom with geo.dat, a simple example，flip thesubmerged bar in the given case：

...
F 60 0.4 // still water depth
B 10 0.0 40.0 0.0 0.04 -0.3 1.0 //rectangular domain size
...

G 9 2 //1:topo 2:solid default:1
G 10 1 // turn geodat on/off
...

geo.dat:
11.0 0.02 0.0
17.0 0.02 -0.3
19.0 0.02 -0.3
22.0 0.02 0.0

Is this setting correct？
Thank you again.

[valgrinda]

Hi Xu Hui,

I would use B 10 0.0 40.0 0.0 0.04 0.0 1.0. The bedlevel due to geodat points does not depend on B 10 for FNFP because of the sigma grid. For CFD it would be different.

[LMD]

Originally Posted by valgrinda

Hi Xu Hui,

I would use B 10 0.0 40.0 0.0 0.04 0.0 1.0. The bedlevel due to geodat points does not depend on B 10 for FNFP because of the sigma grid. For CFD it would be different.

Thank you for your advice sir, I will try it.