Add test with negative time and sub-cycling. Close idaholab#15766

loganharbour · Oct 31, 2020 · 04d3d90 · 04d3d90
1 parent 965d0ca
commit 04d3d90
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diff --git a/test/tests/multiapps/sub_cycling/gold/main_negative_out.e b/test/tests/multiapps/sub_cycling/gold/main_negative_out.e
diff --git a/test/tests/multiapps/sub_cycling/gold/main_negative_out_sub0.e b/test/tests/multiapps/sub_cycling/gold/main_negative_out_sub0.e
diff --git a/test/tests/multiapps/sub_cycling/main_negative.i b/test/tests/multiapps/sub_cycling/main_negative.i
@@ -0,0 +1,64 @@
+[Mesh]
+  type = GeneratedMesh
+  dim = 2
+  nx = 10
+  ny = 10
+[]
+
+[Variables]
+  [./u]
+  [../]
+[]
+
+[Kernels]
+  [./diff]
+    type = Diffusion
+    variable = u
+  [../]
+  [./td]
+    type = TimeDerivative
+    variable = u
+  [../]
+[]
+
+[BCs]
+  [./left]
+    type = DirichletBC
+    variable = u
+    boundary = left
+    value = 0
+  [../]
+  [./right]
+    type = DirichletBC
+    variable = u
+    boundary = right
+    value = 1
+  [../]
+[]
+
+[Executioner]
+  type = Transient
+  start_time = -1.0
+  end_time = 0
+  dt = 0.5
+
+  solve_type = 'PJFNK'
+
+  petsc_options_iname = '-pc_type -pc_hypre_type'
+  petsc_options_value = 'hypre boomeramg'
+[]
+
+[Outputs]
+  exodus = true
+[]
+
+[MultiApps]
+  [./sub]
+    type = TransientMultiApp
+    app_type = MooseTestApp
+    execute_on = timestep_end
+    positions = '0 0 0'
+    input_files = sub.i
+    sub_cycling = true
+  [../]
+[]
diff --git a/test/tests/multiapps/sub_cycling/sub_negative.i b/test/tests/multiapps/sub_cycling/sub_negative.i
@@ -0,0 +1,57 @@
+[Mesh]
+  type = GeneratedMesh
+  dim = 2
+  nx = 10
+  ny = 10
+[]
+
+[Variables]
+  [./u]
+  [../]
+[]
+
+[Kernels]
+  [./diff]
+    type = Diffusion
+    variable = u
+  [../]
+  [./td]
+    type = TimeDerivative
+    variable = u
+  [../]
+[]
+
+[BCs]
+  [./left]
+    type = DirichletBC
+    variable = u
+    boundary = left
+    value = 0
+  [../]
+  [./right]
+    type = DirichletBC
+    variable = u
+    boundary = right
+    value = 1
+  [../]
+[]
+
+[Executioner]
+  type = Transient
+  solve_type = PJFNK
+  petsc_options_iname = '-pc_type -pc_hypre_type'
+  petsc_options_value = 'hypre boomeramg'
+
+  start_time = -1.0
+  end_time = 0
+
+  [TimeStepper]
+    type = IterationAdaptiveDT
+    cutback_factor = 0.666
+    dt = 0.2
+  []
+[]
+
+[Outputs]
+  exodus = true
+[]
diff --git a/test/tests/multiapps/sub_cycling/tests b/test/tests/multiapps/sub_cycling/tests
@@ -40,4 +40,13 @@
 
     requirement = "The system shall support the execution of sub-application that operate with adaptive time steps that differ from the master application."
   []
+  [test_negative_time]
+    # test that sub-cycling with negative times does not make the main and sub-app out-of-sync
+    type = 'Exodiff'
+    input = 'main_negative.i'
+    exodiff = 'main_negative_out.e main_negative_out_sub0.e'
+
+    issues = '#15766'
+    requirement = "The system shall support sub-cycling with negative times by particularly ensuring that the sub-app does not advance further than the main app."
+  []
 []