Modifying Materials Properties

Changing general properties
Changing thermal properties
Changing optical properties
Changing fluid properties
Changing species transport coefficients
Changing mechanical properties

Materials, their properties and the material assignments to regions are the prerequisites for computing simulations with CrysMAS . Modifying materials' properties becomes necessary, if you add a new material or if you want to improve the computation results after a simulation run. You do not have to change the operation mode for modifying properties, because the Materials dialog is available in Materials Mode and in Simulation Mode.

The properties of the material selected in the Material name field are displayed in the large frame on the right hand side of the window, see Materials dialog window. The first column shows the properties' name and parameters, the second the unit of measurement, the third the entries for the properties in phase 0, the fourth the entries for phase 1 and so on. You can add phases by clicking on the Add Phase button. You delete phases by clicking in the column's head to select the phase and then click on Delete Phase. Press and hold the CTRL key for selecting more than one phase to delete.

Warning

The column(s) will be deleted immediately.

Potential data loss, because there is no Undo in Materials Mode!

Make sure that you really do not need these data anymore.

Each material needs at least one phase and therefore CrysMAS will prevent you from deleting the last remaining phase by displaying the following message:

Phase delete error 

Figure 9. Phase delete error

Only phase columns and only properties assigned to the material can be edited. Values to be entered or modified have to be typed into the respective phase column line. We recommend to use the mouse for navigating in the tables cells, but CrysMAS also offers a number of shortcuts, see Keys for editing material properties. The program controls your input and will not allow you to specify a viscosity for solid materials, for instance. Fields which can not be edited are displayed in gray color.

To facilitate defining or changing properties, CrysMAS offers some list boxes in the phase columns for selecting the appropriate characteristic. You just check in the list box, for instance, whether your material is transparent or opaque instead of writing it in.

List box in Materials dialog 

Figure 10. List box in Materials dialog

Properties are grouped into six groups: General, thermal, optical, fluid, species transport and mechanical properties. Fluid, species transport and mechanical properties can be collapsed by clicking on the button in front of the property group's name.