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Versions

Of some data more than one version can exist in the database. This gives the possibility to keep more values for the data items in the database. This is used to store e.g. nodal unknowns at the old time point t, while the new nodal unknowns are being calculated in the current time step. Moreover, it comes handy at mesh refinements, where data for the old coarse mesh and the refined new mesh are avaiable at the same time, etc. Some of the allowed versions are listed below:

version purpose
VERSION_NORMAL Normal working version. Keeps unknowns at old time point t.
VERSION_NEW New mesh. Keeps unknowns at time t+dt.
VERSION_START Keeps the mesh at the start of the calculation; for restarts.
VERSION_TMP Temporarily working version (scratch version).
VERSION_PRINT Temporarily version for printing (some plotters require sequential numbering).
VERSION_MACRO Temporarily version for control_macro option.
... ...


next up previous contents
Next: Debugging Up: TOCHNOG programmers manual - Previous: Database   Contents
tochnog 2001-09-02