A General Set of Bioheat Transfer Equations Based on the Volume Averaging Theory - Porous Media: Applications in Biological Systems and Biotechnology - page 5

Blood vessels

Cells

Vascular region Extravascular region

FIGURE 1.1
Schematic view of biological tissue.

V

V c

FIGURE 1.2
Control volume in a porous medium.

where ε V f /V is the local porosity, namely, the volume fraction of the

vascular space, which is generally less than 0.1. Naturally, anatomical data
are required to find the porosity. Following Cheng (1978), Nakayama (1995),

≡