[BlueWind]

Hi!

I am a new user of SU2, and I would like to apply the mesh adaptation feature on the test case "pitching_naca64a010_rans".

With the older version (6.2.0), I generated the new mesh using SU2_MSH, which seems to be not implemented in the last version. For the new version, I can't find any indication about the sequence of passages needed to perform simulations with adaptive mesh.

If anyone knows more about this problem, any help is gladly accepted. Thank you.

[pcg]

This might help https://github.com/su2code/SU2/issues/948
There was also a presentation on the last SU2 conference: https://su2foundation.org/su2conference2020/

[BlueWind]

Hi pcg,
thank you for your prompt response.
Following these indications I took the steps:

1. downloaded the feature_adapt branch.

2. downloaded the Adaptive 2D NACA 0012 example (https://pyamg.saclay.inria.fr/pyamge....html#2dnaca): adap_NACA0012.cfg, mesh_NACA0012_inv.su2, NACA0012_ini.dat.

3. added the following lines to the config:

% Type of sensor used for adaptation
% Options include GOAL (adjoint-based), MACH, PRES
PYADAP_SENSOR= GOAL
% Objective function used for goal-oriented adaptation
OBJECTIVE_FUNCTION= LIFT
% Maximum cell size for adaptation
PYADAP_HMAX= 500.0
% Minimum cell size for adaptation
PYADAP_HMIN= 1e-9
% Gradation factor (typically 1.2-1.8)
PYADAP_HGRAD= 1.8
% Norm used for adaptation
% 1.0 or 2.0 recommended for inviscid flows
% 4.0 recommeneded for viscid
ADAP_NORM= 4.0
% Approximate mesh size (NPOI) at each level
PYADAP_COMPLEXITY= (30000, 60000, 120000)
% Number of adaptations performed at each level
PYADAP_SUBITE= (3, 3, 3)

4. run the following command: $ python3 SU2_RUN/mesh_adaptation_amg.py -f adap_ONERAM6.cfg -n 6.

The response I have obtained is the following:

SU2-AMG Anisotropic Mesh Adaptation

Mesh adaptation options:
PYADAP_COMPLEXITY : (30000, 60000, 120000)
PYADAP_SUBITE : (2, 2, 2)
PYADAP_SENSOR : MACH
PYADAP_HMAX : 500.0
PYADAP_HMIN : 1e-9
PYADAP_HGRAD : 1.8
PYADAP_FLOW_ITER : (2999, 4999, 6999)
PYADAP_ADJ_ITER : (2999, 4999, 6999)
PYADAP_CFL : (10.0, 15.0, 20.0)
PYADAP_RDG : NO

The ./adap folder was deleted

Generating GMF background surface mesh.
## WARNING: MISSING SU2 MESH FILE KEYWORD: NCORNERS=.
Initial CFD solution is provided.

As expected, a ./ADAP folder was created, containing these docs: amg_back_meshb, config_CFD.cfd, log.err, log.out (sizes 0 byte), mesh_NACA0012_inv.su2 (link to the mesh), NACA0012_ini.dat (link to the file.dat).


Did I perform the procedure correctly? Or did I miss something?
If it is correct and complete, which file contains the adaptive mesh? How can I use it since there is no new .su2 file?

[pcg]

I'm afraid my mesh adaptation knowledge does not go much past its existence.
You can ask those questions in the github issue I mentioned before, the developer (Brian) usually replies quickly.
You can also look around the SU2 github for other mesh adaptation-related issues, extra info might be available (I just picked the one with most comments).

[BlueWind]

Thank you, pcg.
I will look around and maybe ask in github.