Why I cannot run the model with two level nesting well?

nesting
1

Hi everyone!
When I try to run the model with two level nesting (three domains), the model blow up. I am sure that the time step is within the limits of the CFL. I don’t know what the problem is.
And I’ve noticed that when I manually input the subdomain boundaries in AGRIF_FixedGrids.in file, the originally blue commented sections turn black. Could this affect the model? How should I modify the file correctlly?
image descriptionimage description

=======================================
= =
= STEP2D: ABNORMAL JOB END =
= BLOW UP =
= =

VMAX (M/S) = NaN
IMAX JMAX = 147 80
NODE = 11
IMAX JMAX = 36 27
IINT IEXT = 1 1

AGRIF_FixedGrids.in
cppdefs.h
croco_Y2013M01.txt ->This is the.out file

I’m not sure what caused the “CHECKDIMS ERROR: inconsistent size of dimension ‘xi_u’: 94 (must be 148)” error, and how to modify it.

2

Questions:

Does it runs ok for main domain (no nesting)?
Does it runs ok for one nested domain?

Please post your param.h and the result of

ncdump -h croco_grd.nc

ncdump -h croco_grd.nc.1

ncdump -h croco_grd.nc.2

3

The model runs both without nesting and with one nesting. Because this reply seems to be unable to add file links, I have attached the param.h file and the file after ncdump to the answer below.

4

param.h
croco_grd_head.txt
croco_grd_1_head.txt
croco_grd_2_head.txt

5

The attached AGRIF_FixedGrids.in that you uploaded is different from the one in your post. Which one is correct?

6

Your AGRIF_FixedGrids.in file seems weird. From the GRD headers it should be

1

2 53 16 51 3 3 3 3

1

66 130 36 93 3 3 3 3

0

Also, your .1 domain is too close to the boundary. (2 - 53). Is that area on land?

7

I’m still not sure what’s weird about the AGRIF_FixedGrids. The area is not land but includes part of land. I’m going to try to narrow down the.1 domain and not include land.

8

Hello, I would like to ask how do I properly set up multiple nested AGRIF_FixedGrids? Do we have to fix it ourselves?

9

Warning: Contour not rendered for constant ZData > In contour (line 51) In nested_grid (line 436) In interp_child (line 75) In nestgui>interpchild_Callback (line 242) In nestgui (line 49) This is the warning that appeared when I nested, will it affect the result?

10

When doing second level nesting should the top option in the nestgui interface be “child grid file”? Or “parent grid file”? Maybe that’s the problem?

11

I have solved the problem, thank you for your advice!