9.6.2. The Extrusion, BlowMolding, and BlowMolding_viscoelastic Directories

The Extrusion, BlowMolding, and BlowMolding_viscoelastic directories contain material data files that incorporate generic or relevant rheological and thermal data for common materials, such as LDPE, HDPE, PVC, and PS. Each of these directories is specialized for the application and model suggested in the corresponding directory name. More precisely, the Extrusion directory contains material data files to be used for the simulation of extrusion flows in which a generalized Newtonian fluid model is invoked. The BlowMolding directory contains material data files to be used for the simulation of blow molding cases in which a Newtonian fluid model is invoked, for 2D and 3D geometries, as well as for shell simulations. The BlowMolding_viscoelastic directory contains material data files to be used for the simulation of blow molding cases in which an integral KBKZ fluid model is invoked for shell simulations.

In each of these directories, you can find data files for common materials. The file names are designed to allow easy identification, and to conform to a structure or nomenclature. The name structure consists of the following: the process being simulated, the generic name of the material, the thermal attribute, and the temperature. The thermal attribute conveys whether the data is for isothermal or nonisothermal conditions; in the latter case, additional thermal parameters are provided in the file. For isothermal data, the selected temperature is used in the name; for nonisothermal data, it is the reference temperature that is used in the name.

For example, in the Extrusion directory, you will find files like Extrusion_LLDPE_isoth_463K.mat and Extrusion_LLDPE_nonisoth_463K.mat; these files contain relevant data for LLDPE, which can be used for the simulation of an extrusion process under isothermal and nonisothermal conditions, respectively. For the isothermal condition, the selected temperature is 463 K, while for the nonisothermal condition, the rheological data is provided at a reference temperature of 463 K, and incorporates a temperature dependence.