Initialization by FE solution in Transient thermal: operation
Starting by a FE solution
It is possible to start a new transient thermal computation by using as the initial state the result of a Steady State Thermal problem or of a Transient Thermal problem.
TTTT relevance / example
For the applications related the thermal treatment, the study of the «cycles of heating» (heating / holding / cooling) will permit an optimization of the process.
To simulate the heating cycles two strategies are possible in Flux.
With the first strategy, (« via formula »), the inductor, as well as the physical properties of the materials are piloted by means of formulas, for the different phases of the process. It is therefore necessary to know beforehand the times of each of the phases, which is not always the case.
With the second strategy, the study of the different phases is cut out within the time (independent Flux projects) and the transfer of data between the Flux projects is carried out by file. It is this operation that is explained in the next section.
Operation
The operation principle is described in the table below for the case of a sequence : TTTT
Phase  Description 

1  Construction of the Flux 1 project (TT application) 
2  Solving of the Flux 1 project (TT application) 
2 
Export of the FE solution: creation of an exchange file (format FTS) 
Phase  Description 

1 
Construction of the Flux 2 project (TT application) on the basis of the Flux 1 project (TT application) 
2  Modifications of the physical properties 
3 
Choice of the initial conditions :

4  Solving of the Flux 2 project (TT application) 