Advanced Calculation Parameters

Time Step Model:	By means of the table you can define how the desired timestep is depending on the time. The program will try to use this timestep under consideration to casting times, time of form application/removal etc. After a casting or changing of transmission coefficients, the program will automatically divide the first time-interval into 12 smaller intervals.
Timestep Factor:	A number between 0 and 1 (default=0.5) indicating the relative time in the time-interval at which the calculation is performed. If the results are showing oscillations choose a number slightly different from 0.5 e.g. 0.45.
Convergence Criteria:	Due to the non-linearity of the heat of hydration (function of maturity which is a function of temperature depending on the heat of hydration) or radiation boundaries, the analysis is resulting in a non-linear set of equations. The equations are solved iteratively, and the process is stopped when the length of the incremental vector compared to the total vector is lesser than the convergence criteria (default 0.0015).
Gradient of mesh:	The size of the elements at the surfaces is defined when specifying the volumes. The distribution of the element-fineness towards the core is described by the gradient. A gradient value of 0.1 results in a uniform distribution. A value of 1.0 results in the steepest possible distribution, with coarse elements at the core. After meshing and calculation you must compare the fineness of the mesh with the variation of the temperature and stress field you want to determine. If the iso-lines are not smooth the mesh is too coarse, and you have to re-mesh with a lower element-size. However, it should be noted that differences in material properties and concrete age mean that the iso-lines across construction joints do not have to be smooth.
Size of elements around cooling pipes/heating wires	The size of the elements at the surface of cooling pipes/heating wires.
Box Factor	Meshing is done by means of a bounding box which is enclosing the structure. As default is used a box of a magnitude of 100 times the extent of the structure. In case of problems with generating the element mesh, try another value, 10 or 1000 e.g.
Zenith Vector:	The Zenith Vector points towards the zenith (the point above your head). By specifying the vector, you can get a convenient appearance of the structure in the right, graphic window. The direction of the vector also defines the direction, opposite the gravity force (self-weight).
Additional results	If checked, additional results are saved for visualization.
Model for evaporation/condensation	When considering evaporation and/or condensation in the analysis, the model for this must be defined.