Geoscience Reference
In-Depth Information
pS
: capillary pressure curve, only depending on
(
;
()
l
S
for example, in the
cl
case of the Brooks and Corey model [BRO 64]:
ppS
−
=
[6.10]
e l
with
p
: air entry pressure
α: fitting parameter.
()
Figure 6.2 shows the evolution of the function
Ct g
φ , with α as
cap
c
parameter for
p
= 30 kPa.
Figure 6.2.
Evolution of the function c
cap
/tg
ϕ
(p
c
),
with
α
as parameter
,
for p
e
= 30 kPa [DAN 02]
In a somewhat similar approach, Gray and Schrefler [GRA 01] suggested a
thermodynamic definition of the effective stress notion in porous media. Their
macroscopic approach also takes into account the microscopic boundary conditions,
in particular the liquid-solid interfaces. Two cases were studied: in the first one, the
wetting phase forms menisci at the points of contact of the solid phase; in the second
case, the wetting phase is present as a film enveloping the solid.
Search WWH ::
Custom Search