TRANSFER File format

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TRANSFER File format

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The format of a TRANSFER file is dictated by the TRANSFER output format, and contains the following data.


The Header Section

1) A header containing an identifying section listing the FlexPDE version, generating problem name and run time, and plotted variable name or function equation.  This header is enclosed in comment brackets, { ... }.


2) A file identifier "FlexPDE transfer file", and the problem title.


3) The number of geometric dimensions and their names.


4) The finite element basis identifier from 4 to 10, meaning:

4 = linear triangle (3 points per cell)
5 = quadratic triangle (6 points per cell)
6 = cubic triangle (9 points per cell)
7 = cubic triangle (10 points per cell)
8 = linear tetrahedron (4 points per cell)
9 = quadratic tetrahedron (10 points per cell)
10 = cubic tetrahedron (20 points per cell)


5) The number of degrees of freedom (points per cell as above).


6) Current problem time and timestep (time-dependent problems only).


7) The number of output variables and their names


8) The number of domain joints (boundary break points) and their descriptions, including

Joint number
Periodic image joint (or 0)
Associated global node number
Extrusion surface (or 0)
Active flag


9) The number of domain edges and their descriptions, including

Edge number
Associated base plane edge number
Beginning joint number
Ending joint number
Periodic image edge (or 0)
Extrusion surface (or 0)
Extrusion layer (or 0)
Active, Feature and Contact flags
Edge name


10) The number of 3D domain faces and their descriptions, including

Face number
Associated base plane face number
Left adjoining Region number
Right adjoining Region number
Periodic image face (or 0)
Shape selector
Layer or surface number
Active and Contact flags
Face name


11) The number of domain regions and their descriptions, including

Region number
Associated base plane region number
Layer (or 0)
Material number
Active flag
Region name



The Data Section

Each distinct material type in the exported problem is represented by a separate section in the TRANSFER file.  Material types are defined by matching parameter definitions.  Each data section consists of:


1)  The number of nodes


2) The nodal data, containing one line for each node with the following format:

two or three coordinates and as many data values as specified in (7).
a colon (:)
the global node index
the node type (0=interior; 1=joint; 2=edge; 3=face; 4=exterior)
the type qualifier (region number, joint number, edge number or face number)
the periodic node index



3) The number of cells.


4) The cell connectivity data, one line per cell, listing the following:

the geometric basis (as in Header 4)
the node numbers (local to the current material block) which comprise the cell.  The count of these node numbers is controlled by (Header 5).
a colon (:)
the global cell number
the logical region number
the material number


The node numbers are presented in the following order: