Merge pull request #506 from firedrakeproject/TBendall/ExplicitGuessFix

Remove guess of first value in explicit multistage scheme
firedrakeproject · Apr 30, 2024 · dd678e2 · dd678e2
2 parents c7afcae + 52cf1c0
commit dd678e2
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diff --git a/gusto/time_discretisation.py b/gusto/time_discretisation.py
@@ -959,9 +959,6 @@ def solve_stage(self, x0, stage):
         if self.increment_form:
             self.x1.assign(x0)
 
-            # Use x0 as a first guess (otherwise may not converge)
-            self.x_out.assign(x0)
-
             for i in range(stage):
                 self.x1.assign(self.x1 + self.dt*self.butcher_matrix[stage-1, i]*self.k[i])
             for evaluate in self.evaluate_source:

diff --git a/integration-tests/data/linear_sw_wave_chkpt.h5 b/integration-tests/data/linear_sw_wave_chkpt.h5