Data files contain the values of the flow field in each grid element and the convergence history (residuals) for that flow field. For information about the format of data files see Appendix B.
Select the File/Read/Data... menu item to invoke the Select File dialog box.
File Read Data...
Read a data file using the Select File dialog box.
Select the File/Write/Data... menu item to invoke the Select File dialog box.
File Write Data...
Write a Data file using the Select File dialog box.
When FLUENT reads a data file, it first looks for a file with the exact name you typed. If a file with that name is not found, it searches for the same file with different extensions (Section 4.1.5). When FLUENT writes a data file, .dat is added to the name you type unless the name already ends with .dat.