From 38fc9cb4514c219bd875376510b961165e7274cf Mon Sep 17 00:00:00 2001
From: Sabet Seraj <48863473+sseraj@users.noreply.github.com>
Date: Mon, 9 May 2022 11:40:03 -0400
Subject: [PATCH] Increased ANKSwitchTol (#218)

* Increased ANKSwitchTol

* suppress terminal output for failed mesh test
---
 adflow/pyADflow.py            | 2 +-
 doc/options.yaml              | 2 +-
 tests/reg_tests/test_solve.py | 3 +++
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/adflow/pyADflow.py b/adflow/pyADflow.py
index 682bbdc22..ce5311688 100644
--- a/adflow/pyADflow.py
+++ b/adflow/pyADflow.py
@@ -4999,7 +4999,7 @@ def _getDefaultOptions():
             # Approximate Newton-Krylov Parameters
             "useANKSolver": [bool, True],
             "ANKUseTurbDADI": [bool, True],
-            "ANKSwitchTol": [float, 1.0],
+            "ANKSwitchTol": [float, 1e3],
             "ANKSubspaceSize": [int, -1],
             "ANKMaxIter": [int, 40],
             "ANKLinearSolveTol": [float, 0.05],
diff --git a/doc/options.yaml b/doc/options.yaml
index f10739b0f..3db7ea50d 100644
--- a/doc/options.yaml
+++ b/doc/options.yaml
@@ -773,7 +773,7 @@ ANKUseTurbDADI:
 ANKSwitchTol:
   desc: >
     Relative convergence in the residual norm before we switch to the ANK solver.
-    A value of 1.0 means that the ANK solver is used from the first iteration.
+    For most cases, the default value should ensure that the ANK solver is used from the first iteration, even after design changes.
 
 ANKSubspaceSize:
   desc: >
diff --git a/tests/reg_tests/test_solve.py b/tests/reg_tests/test_solve.py
index 5f0af2aff..45a361010 100644
--- a/tests/reg_tests/test_solve.py
+++ b/tests/reg_tests/test_solve.py
@@ -124,6 +124,9 @@ def test_solve(self):
 
 
 class TestFailedMesh(unittest.TestCase):
+
+    N_PROCS = 1
+
     def test_failed_mesh(self):
         options = copy.copy(adflowDefOpts)
         options.update(