What variables can be coarse grained by FlowSieve?

[NoraLoose]

Is FlowSieve specialized in coarse-graining velocity fields? Or can you also coarse-grain tracer fields?

I think these are questions that many potential users will have. It would be great if 1-2 clarifying sentences can be included in the paper & documentation.

openjournals/joss-reviews#4277

[bastorer]

FlowSieve can coarse-grain any scalar fields, and can nominally process any vector field as well, provided that it first be passed through the Helmholtz projection step.

A lot / most of the diagnostic outputs are built around filtering velocity, but we've also filtered density fields using the coarse_grain_scalar.x case file.

Good suggestion about the clarifying sentences! I'll add those.

[NoraLoose]

Gotcha! Could be nice to illustrate the filtering of a scalar field as part of the basic tutorial as well. I know tons of people who want to filter scalar fields - so having an example for scalar fields in the tutorial could attract more users! 😃

[bastorer]

Good point! I'll work on giving the Tutorials section (and documentation) a bit of an overhaul this week.

[bastorer]

@NoraLoose the scalars tutorial has been added and the documentation and paper includes the line

computes coarse-grained scalar and vector fields for arbitrary filter scales, in both Cartesian and spherical coordinates

in the core features section.

[NoraLoose]

Great, thanks for adding these clarifications and the tutorial! I'm closing this issue.