Gas-phase species transport data is required for a collision-frequency reaction formulation, and for reactor models or other programs that require a transport linkfile. The data can be read from a database file (for example, tran.dat) and/or read directly from the Gas-phase Kinetics input file. To include transport data in the input file, the first line of the data should be the word TRANSPORT (or TRAN), and the last line should be the word END. If TRANSPORT ALL is used, it is expected that all required transport data is given in this section, or else a database file is used to supplement data not provided here.

The TRANSPORT...END data block’s format should resemble this:

TRANSPORT
C2H4	2 280.800 3.971 0.000 0.000 1.500
END

For the collision frequency reaction, the required collision diameter of species will be obtained from the transport data and stored in the gas-phase linkfile. For reactor models or other programs that require a supplemental transport linkfile, the User Interface provides a check-box option on the Pre-Processing panel, Process Transport Properties; if this is checked, transport-data coefficient fitting is performed, and a transport linkfile written.

Details on the transport data format, whether included in the Gas-Phase Kinetics input file or in a transport properties database file, are provided in Transport Data Format .