Restarting ATS simulation using a mesh with different 3D side sets

[Utkarsh Mital]

Hello, 

Is it possible to restart an ATS simulation using a mesh that has different side sets? Context: I want to explore imposing different forcings to different regions on the mesh. Effectively, I plan to create a number of meshes, all of which have an identical construction but different side sets. The idea is to explore flow of water under different land management scenarios. 

Can I use checkpoints generated from runs on mesh-A to initialize runs on mesh-B? Any gotchas I should be careful about?

Thanks,
Utkarsh

[Coon, Ethan]

Yes, if literally the only difference in the mesh file is an addition of extra labeled sets, you should be fine.  Partitioning should carry through identically, and so checkpoint files should be valid.

The one gotcha I can think of would be that changing the material property sets (material_id argument to the extrude function in Watershed Workflow) would break checkpoint files.  But if you’re just adding or removing “extra” labeled sets that are used for boundary conditions or sources or whatever, you should be fine.

Ethan

From: ats-...@googlegroups.com <ats-...@googlegroups.com> on behalf of Utkarsh Mital <umi...@lbl.gov>
Date: Tuesday, March 10, 2026 at 8:00 PM
To: Amanzi-ATS Users <ats-...@googlegroups.com>
Subject: [EXTERNAL] Restarting ATS simulation using a mesh with different 3D side sets

This Message Is From an External Sender

This email was sent from a non-ORNL address. If suspicious, use the Report Phish button in Outlook.

 

--
You received this message because you are subscribed to the Google Groups "Amanzi-ATS Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ats-users+...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/ats-users/78c3e8a9-3cef-40bc-8c38-9497fc8ea3d5n%40googlegroups.com.

[David Moulton]

I agree with Ethan, but I also wanted to point out that sidesets can overlap.  In other words you should be able to generate a single mesh with all the sidesets you need.  You would just need to be careful to make sure the sidesets you use in a given simulation don’t overlap, and do cover the region of interest completely. 

Cheers, David. 

To view this discussion visit https://groups.google.com/d/msgid/ats-users/SA0PR09MB6953832480F8D3914B790010A947A%40SA0PR09MB6953.namprd09.prod.outlook.com.