In first column, one finds for each line check boxes. The purpose of the check box is to save (as comment not interpreted by SYRTHES) a setting we want momentarily discard. When trying different conditions, it may be interesting to comment a previous try instead of purely erasing it, and be obliged to retype it to come back to the previous parameters. This has been introduced in the SYRTHES interface to mimick the possiblility to simply activate or not a command or a condition by simply adding or removing a "/" in first column of the ASCII SYRTHES file.

The second column allows to choose between three possibilities :

• Constant
• Function
• Program

Constant is indicating a constant source term (in W/m3) on a collection of elements identified by their reference. SYRTHES will scan all the element having these references and will set the prescribed temperature at all nodes belonging to these elements. One has to be aware that a node belonging to two elements with different colors and initial temperature conditions will get the condition indicated last.

Function follows the same principle but the setting of the source term (in W/m3) may this time be a function in which several parameters can be included :

• tt : time (in second)
• x : x coordinates
• y : y coordinates
• z : z coordinates (if in 3D)
• T : Temperature in Deg C (T representing the average temperature of the corresponding element)

Program corresponds to configurations which cannot be handled with the two previous conditions. In that case, user will have to fill the corresponding C program which can be accessed through the window User C function. Still, users have to define the elements concerned by that condition in indicating the reference of these elements. This is compulsory to allocate the required memory.

"References" corresponds to the list of references (on elements) concerned by that condition.

"User comments" allows to put a short description about the group of elements concerned and the source term set.