Now that the bubble gases have been apportioned among the elements, providing the volume fractions of gas and polymer, φgi = Vgi/Vi and φpi / Vpi/Vi, for each element i, the bulk material properties of the element can be determined.
The definition of total mass density for element i is
|
| (44) |
from equation (5). From the derivation of the energy equation (98) in Appendix A, the equivalent volumetric thermal capacity in element i is
 | (45) |
The effective thermal conductivity for each (node/element) is determined from equation (13) as
 | (46) |