On Fri, 29 Jan 2016, Junchao Zhang wrote:
I tested the modified code with uniform refinement and
exact_sol.extra_quadrature_order(1). I printed out both l2 error and h1 error
and got
time = 0.025, refinement step = 0, elements = 10240, l2_error = 0.002885,
h1_error = 0.239394
Time = 0.025, refinement step = 1, elements = 40960, l2_error = 0.002643,
h1_error = 0.207076
Time = 0.025, refinement step = 2, elements = 163840, l2_error = 0.002596,
h1_error = 0.210480
Time = 0.025, refinement step = 3, elements = 655360, l2_error = 0.002575,
h1_error = 0.214309
Time = 0.025, refinement step = 4, elements = 2621440, l2_error = 0.002569,
h1_error = 0.215482
We can see l2_error monotonically decreases, however h1_error does not. What is
the possible reason?
Both should be decreasing much faster than that. You're refining the
initial mesh, before the initial conditions are projected?
---
Roy
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