diff --git a/include/tensor_computes/ParsedCompute.h b/include/tensor_computes/ParsedCompute.h
index 8ab7c36..2cf9d6f 100644
--- a/include/tensor_computes/ParsedCompute.h
+++ b/include/tensor_computes/ParsedCompute.h
@@ -32,5 +32,7 @@ class ParsedCompute : public TensorOperator
   ParsedJITTensor _jit;
   ParsedTensor _no_jit;
 
+  torch::Tensor _time_tensor;
   std::vector<const torch::Tensor *> _params;
+  const bool _real_space;
 };
diff --git a/include/tensor_computes/TensorOperatorBase.h b/include/tensor_computes/TensorOperatorBase.h
index 70d8fbd..324ef83 100644
--- a/include/tensor_computes/TensorOperatorBase.h
+++ b/include/tensor_computes/TensorOperatorBase.h
@@ -61,4 +61,7 @@ class TensorOperatorBase : public MooseObject, public DependencyResolverInterfac
 
   /// reciprocal axes
   const torch::Tensor &_i, &_j, &_k;
+
+  /// substep time
+  const Real & _time;
 };
diff --git a/scripts/TestHarness/tests/test_HDF5Diff.py b/scripts/TestHarness/tests/test_HDF5Diff.py
index bc6b71c..cfeb5c4 100644
--- a/scripts/TestHarness/tests/test_HDF5Diff.py
+++ b/scripts/TestHarness/tests/test_HDF5Diff.py
@@ -41,5 +41,5 @@ def testDataSetMismatch(self):
             self.runTests('-i', 'hdf5diffs', '--re', 'dataset_mismatch')
 
         e = cm.exception
-        self.assertRegex(e.output, "tester\.dataset_mismatch:.*\['c\.0', 'c\.1', 'c\.2', 'mu\.0', 'mu\.1', 'mu\.2'\]")
+        self.assertRegex(e.output, r"tester\.dataset_mismatch:.*\['c\.0', 'c\.1', 'c\.2', 'mu\.0', 'mu\.1', 'mu\.2'\]")
         self.checkStatus(e.output, failed=1)
diff --git a/src/actions/DomainAction.C b/src/actions/DomainAction.C
index ac9dbae..cc9894d 100644
--- a/src/actions/DomainAction.C
+++ b/src/actions/DomainAction.C
@@ -477,11 +477,11 @@ DomainAction::ifft(const torch::Tensor & t) const
   switch (_dim)
   {
     case 1:
-      return torch::fft::irfft(t);
+      return torch::fft::irfft(t, getShape()[0]);
     case 2:
-      return torch::fft::irfft2(t);
+      return torch::fft::irfft2(t, getShape());
     case 3:
-      return torch::fft::irfftn(t, c10::nullopt, {0, 1, 2});
+      return torch::fft::irfftn(t, getShape(), {0, 1, 2});
     default:
       mooseError("Unsupported mesh dimension");
   }
diff --git a/src/tensor_computes/ComputeGroup.C b/src/tensor_computes/ComputeGroup.C
index 6c54a11..be78a9d 100644
--- a/src/tensor_computes/ComputeGroup.C
+++ b/src/tensor_computes/ComputeGroup.C
@@ -42,7 +42,14 @@ void
 ComputeGroup::computeBuffer()
 {
   for (const auto & cmp : _computes)
-    cmp->computeBuffer();
+    try
+    {
+      cmp->computeBuffer();
+    }
+    catch (const std::exception & e)
+    {
+      cmp->mooseError("Exception: ", e.what());
+    }
 }
 
 void
diff --git a/src/tensor_computes/FFTGradient.C b/src/tensor_computes/FFTGradient.C
index f03da65..1b458e8 100644
--- a/src/tensor_computes/FFTGradient.C
+++ b/src/tensor_computes/FFTGradient.C
@@ -36,7 +36,6 @@ FFTGradient::FFTGradient(const InputParameters & parameters)
 void
 FFTGradient::computeBuffer()
 {
-  std::cout << std::endl;
   _u = _domain.ifft((_input_is_reciprocal ? _input : _domain.fft(_input)) *
                     _domain.getReciprocalAxis(_direction) * _i);
 }
diff --git a/src/tensor_computes/ParsedCompute.C b/src/tensor_computes/ParsedCompute.C
index 439999b..422cf1a 100644
--- a/src/tensor_computes/ParsedCompute.C
+++ b/src/tensor_computes/ParsedCompute.C
@@ -32,7 +32,7 @@ ParsedCompute::validParams()
                         false,
                         "Provide i (imaginary unit), kx,ky,kz (reciprocal space frequency), k2 "
                         "(square of the k-vector), x,y,z "
-                        "(real space coordinates), and pi,e.");
+                        "(real space coordinates), time t, pi, and e.");
   // Constants and their values
   params.addParam<std::vector<std::string>>(
       "constant_names",
@@ -42,14 +42,15 @@ ParsedCompute::validParams()
       "constant_expressions",
       std::vector<std::string>(),
       "Vector of values for the constants in constant_names (can be an FParser expression)");
-
+  params.addParam<bool>("real_space", true, "Is the tensor being computed a real space tensor?");
   return params;
 }
 
 ParsedCompute::ParsedCompute(const InputParameters & parameters)
   : TensorOperator(parameters),
     _use_jit(getParam<bool>("enable_jit")),
-    _extra_symbols(getParam<bool>("extra_symbols"))
+    _extra_symbols(getParam<bool>("extra_symbols")),
+    _real_space(getParam<bool>("real_space"))
 {
   const auto & expression = getParam<std::string>("expression");
   const auto & names = getParam<std::vector<TensorInputBufferName>>("inputs");
@@ -69,7 +70,7 @@ ParsedCompute::ParsedCompute(const InputParameters & parameters)
     _params.push_back(&getInputBufferByName(name));
 
   static const std::vector<std::string> reserved_symbols = {
-      "i", "x", "kx", "y", "ky", "z", "kz", "k2"};
+      "i", "x", "kx", "y", "ky", "z", "kz", "k2", "t"};
 
   // helper function to check if the name given is one of the reserved_names
   auto isReservedName = [this](const auto & name)
@@ -108,7 +109,8 @@ ParsedCompute::ParsedCompute(const InputParameters & parameters)
       // append extra symbols
       variables_vec.insert(variables_vec.end(), reserved_symbols.begin(), reserved_symbols.end());
 
-      _constant_tensors.push_back(torch::tensor(c10::complex<double>(0.0, 1.0)));
+      _constant_tensors.push_back(
+          torch::tensor(c10::complex<double>(0.0, 1.0), MooseTensor::complexFloatTensorOptions()));
       _params.push_back(&_constant_tensors[0]);
 
       for (const auto dim : make_range(3u))
@@ -118,6 +120,7 @@ ParsedCompute::ParsedCompute(const InputParameters & parameters)
       }
 
       _params.push_back(&_domain.getKSquare());
+      _params.push_back(&_time_tensor);
 
       fp.AddConstant("pi", libMesh::pi);
       fp.AddConstant("e", std::exp(Real(1.0)));
@@ -185,8 +188,13 @@ ParsedCompute::ParsedCompute(const InputParameters & parameters)
 void
 ParsedCompute::computeBuffer()
 {
+  if (_extra_symbols)
+    _time_tensor = torch::tensor(_time, MooseTensor::floatTensorOptions());
+
+  // use local shape if we add parallel support, and add option for reciprocal shape
   if (_use_jit)
-    _u = _jit.Eval(_params);
+    _u = _jit.Eval(_params).expand(_real_space ? _domain.getShape() : _domain.getReciprocalShape());
   else
-    _u = _no_jit.Eval(_params);
+    _u = _no_jit.Eval(_params).expand(_real_space ? _domain.getShape()
+                                                  : _domain.getReciprocalShape());
 }
diff --git a/src/tensor_computes/TensorOperatorBase.C b/src/tensor_computes/TensorOperatorBase.C
index dcd0f0f..0a9226c 100644
--- a/src/tensor_computes/TensorOperatorBase.C
+++ b/src/tensor_computes/TensorOperatorBase.C
@@ -33,7 +33,8 @@ TensorOperatorBase::TensorOperatorBase(const InputParameters & parameters)
     _z(_domain.getAxis(2)),
     _i(_domain.getReciprocalAxis(0)),
     _j(_domain.getReciprocalAxis(1)),
-    _k(_domain.getReciprocalAxis(2))
+    _k(_domain.getReciprocalAxis(2)),
+    _time(_tensor_problem.subTime())
 {
 }
 
diff --git a/src/tensor_solver/SecantSolver.C b/src/tensor_solver/SecantSolver.C
index 8e0196a..cfccc21 100644
--- a/src/tensor_solver/SecantSolver.C
+++ b/src/tensor_solver/SecantSolver.C
@@ -140,7 +140,7 @@ SecantSolver::secantSolve()
       if (_verbose)
       {
         const auto unorm = torch::norm(du).item<double>();
-        std::cout << _iterations << " |du| = " << unorm << " |R|=" << Rnorm << std::endl;
+        _console << _iterations << " |du| = " << unorm << " |R|=" << Rnorm << std::endl;
       }
 
       // nan check
diff --git a/test/tests/cahnhilliard/cahnhilliard.i b/test/tests/cahnhilliard/cahnhilliard.i
index 1b3b537..ceac3b7 100644
--- a/test/tests/cahnhilliard/cahnhilliard.i
+++ b/test/tests/cahnhilliard/cahnhilliard.i
@@ -14,7 +14,6 @@
   device_names = cpu
 []
 
-
 [TensorBuffers]
   [c]
   []
@@ -81,6 +80,7 @@
       enable_jit = true
       expression = 'Mbar*mubar'
       inputs = 'Mbar mubar'
+      real_space = false
     []
     [cbar]
       type = ForwardFFT
diff --git a/test/tests/postprocessors/gold/interface_velocity_out.csv b/test/tests/postprocessors/gold/interface_velocity_out.csv
new file mode 100644
index 0000000..0026614
--- /dev/null
+++ b/test/tests/postprocessors/gold/interface_velocity_out.csv
@@ -0,0 +1,12 @@
+time,v
+0,0
+0.01,0
+0.02,0.2006196179713
+0.03,0.2006238853419
+0.04,0.20062820630563
+0.05,0.20063258191329
+0.06,0.20063701324401
+0.07,0.200641501405
+0.08,0.20064604753323
+0.09,0.20065065279606
+0.1,0.20065531839251
diff --git a/test/tests/postprocessors/interface_velocity.i b/test/tests/postprocessors/interface_velocity.i
new file mode 100644
index 0000000..e09d586
--- /dev/null
+++ b/test/tests/postprocessors/interface_velocity.i
@@ -0,0 +1,45 @@
+[Domain]
+  dim = 2
+  nx = 10
+  ny = 2
+  xmax = ${fparse pi*4}
+  mesh_mode = DUMMY
+  device_names = cpu
+[]
+
+[TensorBuffers]
+  [c]
+  []
+[]
+
+[TensorComputes]
+  [Solve]
+    [c]
+      type = ParsedCompute
+      buffer = c
+      extra_symbols = true
+      expression = sin(x+0.2*t)
+    []
+  []
+[]
+
+[Postprocessors]
+  [v]
+    type = TensorInterfaceVelocityPostprocessor
+    buffer = c
+  []
+[]
+
+[Problem]
+  type = TensorProblem
+[]
+
+[Executioner]
+  type = Transient
+  num_steps = 10
+  dt = 0.01
+[]
+
+[Outputs]
+  csv = true
+[]
diff --git a/test/tests/postprocessors/tests b/test/tests/postprocessors/tests
index 296cae7..74ccef5 100644
--- a/test/tests/postprocessors/tests
+++ b/test/tests/postprocessors/tests
@@ -37,4 +37,13 @@
     issues = '#6'
     design = 'ReciprocalIntegral.md'
   []
+
+  [interface_velocity]
+    type = CSVDiff
+    input = interface_velocity.i
+    csvdiff = interface_velocity_out.csv
+    requirement = 'The system shall be able to measure the maximum interfacial velocity for a given tensor.'
+    issues = '#6'
+    design = 'TensorInterfaceVelocityPostprocessor.md'
+ []
 []
diff --git a/test/tests/tensor_compute/backandforth.i b/test/tests/tensor_compute/backandforth.i
index b76a409..41ae5db 100644
--- a/test/tests/tensor_compute/backandforth.i
+++ b/test/tests/tensor_compute/backandforth.i
@@ -1,7 +1,4 @@
 [Domain]
-  dim = 2
-  nx = 20
-  ny = 20
   xmax = ${fparse pi*4}
   ymax = ${fparse pi*4}
   device_names = 'cpu'
@@ -9,6 +6,8 @@
 []
 
 [TensorBuffers]
+  [eta_gold]
+  []
   [eta]
   []
   [eta_bar]
@@ -17,16 +16,24 @@
   []
   [zero]
   []
+  [diff]
+  []
 []
 
 [TensorComputes]
   [Initialize]
-    [eta]
+    [eta_gold]
       type = ParsedCompute
-      buffer = eta
+      buffer = eta_gold
       expression = 'sin(x)+sin(y)+sin(z)'
       extra_symbols = true
     []
+    [eta]
+      type = ParsedCompute
+      buffer = eta
+      expression = eta_gold
+      inputs = eta_gold
+    []
     [eta2]
       type = ConstantTensor
       buffer = eta2
@@ -52,6 +59,22 @@
       input = eta_bar
     []
   []
+
+  [Postprocess]
+    [diff]
+      type = ParsedCompute
+      buffer = diff
+      expression = 'abs(eta - eta2) + abs(eta - eta_gold)'
+      inputs = 'eta eta2 eta_gold'
+    []
+  []
+[]
+
+[Postprocessors]
+  [norm]
+    type = TensorIntegralPostprocessor
+    buffer = diff
+  []
 []
 
 [TensorSolver]
@@ -68,13 +91,9 @@
 
 [Executioner]
   type = Transient
-  num_steps = 2
+  num_steps = 4
 []
 
-[TensorOutputs]
-  [xdmf]
-    type = XDMFTensorOutput
-    buffer = 'eta eta2'
-    enable_hdf5 = true
-  []
+[Outputs]
+  csv = true
 []
diff --git a/test/tests/tensor_compute/gold/backandforth.h5 b/test/tests/tensor_compute/gold/backandforth.h5
deleted file mode 100644
index 6251f46..0000000
Binary files a/test/tests/tensor_compute/gold/backandforth.h5 and /dev/null differ
diff --git a/test/tests/tensor_compute/gold/backandforth_out.csv b/test/tests/tensor_compute/gold/backandforth_out.csv
new file mode 100644
index 0000000..1d89e52
--- /dev/null
+++ b/test/tests/tensor_compute/gold/backandforth_out.csv
@@ -0,0 +1,6 @@
+time,norm
+0,0
+1,0
+2,0
+3,0
+4,0
diff --git a/test/tests/tensor_compute/tests b/test/tests/tensor_compute/tests
index ffa853f..d8881f1 100644
--- a/test/tests/tensor_compute/tests
+++ b/test/tests/tensor_compute/tests
@@ -1,12 +1,50 @@
 [Tests]
   [backandforth]
-    type = HDF5Diff
-    input = backandforth.i
-    hdf5diff = backandforth.h5
-    abs_tol = 1e-13
     issues = '#6'
     requirement = 'The system shall be able to transform a buffer from real space to reciprocal space and back and recover the original tensor'
     design = PerformFFT.md
+    [even_1d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=1 Domain/nx=10'
+      detail = 'in one dimension with an even number of grid cells'
+    []
+    [odd_1d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=1 Domain/nx=11'
+      detail = 'in one dimension with an odd number of grid cells'
+    []
+    [even_2d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=2 Domain/nx=10 Domain/ny=8'
+      detail = 'in two dimensions with an even number of grid cells'
+    []
+    [odd_2d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=1 Domain/nx=9 Domain/ny=11'
+      detail = 'in two dimensions with an odd number of grid cells'
+    []
+    [even_3d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=2 Domain/nx=10 Domain/ny=8 Domain/nz=12'
+      detail = 'in three dimensions with an even number of grid cells'
+    []
+    [odd_3d]
+      type = CSVDiff
+      input = backandforth.i
+      csvdiff = backandforth_out.csv
+      cli_args = 'Domain/dim=1 Domain/nx=9 Domain/ny=13 Domain/nz=11'
+      detail = 'in three dimensions with an odd number of grid cells'
+    []
   []
   [rotating_grain_secant]
     type = HDF5Diff