non-conservative tracers. In practice, this makes little difference because it's multiplied by div(Umac) which the MAC projection just enforced to be numerically zero to within its tolerance.
Also make the density field non-constant and add a second, non-conservative tracer in the tracer_adv_diff_cn regression test. This will require creating new benchmarks for the 2D and 3D tests.
non-conservative tracers. In practice, this makes little difference because it's multiplied by div(Umac) which the MAC projection just enforced to be numerically zero to within its tolerance.
Also make the density field non-constant and add a second, non-conservative tracer in the tracer_adv_diff_cn regression test. This will require creating new benchmarks for the 2D and 3D tests.