Reply To: Data Transfer

[Rob]

OK, thanks.
If the reaction scheme is a UDF and uses some function of what is in a cell (can be a UDM to track how much of something else has been used, and that includes on a wall facet) then the source term will give the value in each cell. It's calculated over the whole volume on a cell basis.
For an external scheme you'd need some mechanism of getting the values back to locations bearing in mind that the external code won't know about the cells, or if they do their ID.