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l2-norm of velocity errors from different residual norm tolerances. The solution error is obtained from nodal velocity errors after 10 time steps, using a reference simulation with a tolerance up to the machine precision, ϵ = 10−12.
| ϵ = 10−1 | ϵ = 10−3 | ϵ = 10−6 | ϵ = 10−9 | |
|---|---|---|---|---|
| Err | 0.2235 | 0.0028 | 1.618×10−7 | 1.107×10−9 |
