Attribute: KOMP (nodewise) [m²/N] (only for 3D models)

The KOMP attribute can be used to define the compressibility of the entire system, consisting of both matrix and fluid compressibility. The attribute is assigned automatically. If the KOMP attribute is not defined in the model file, then the matrix compressibility that (α) and the fluid compressibility (β) are entered in the dialogue box for transient calculations. The formula for the compressibility is as follows

KOMP = (1-n)*matrix compressibility + n*fluid compressibility, where n = porosity