POLYFLOW - What are the contents of a curv_* file ?
POLYFLOW produces sometimes files whose name is curv.* or curv_*.*; they are also produced when one asks for force or flux post-processor. What are the contents of such files?
The typical contents of such a file is e.g.
Flux pp. dual
X0 : 0.9886926E-02 0.0000000E+00
Dx : 0.1000000E+01 0.0000000E+00
Such files contain the flux density or force density vs. a linear abcissa along the assigned boundary. Actually, the first five lines are a header, and are not considered when reading the file with e.g. polymat. In this header, x0 and Dx respectively denote the starting point and the direction calculated on the basis of the first element met on the assigned boundary. These quantity may allow the identification of the boundary, when needed. The subsequent pairs of real numbers are the curvilinear abcissa and the corresponding nodal value of the flux (or force).
The curvilinear abcissa results from the sum of element lengths encountered from the initially selected node.
If a file contains two colomns of real values, the data refer to a heat flux density; otherwise, it refers to a force density, with two or three components.
It is important to note that these flux or force densities are estimated on the basis of generalised quantities, and differences with possibly expected values may exist.