Environmental Engineering Reference
In-Depth Information
θ
(
) ( )
θ
l
∫
0
A
≈
ρ
θ
+
θ
−
2
θ
D
θ
d
[9.38]
0
i
θ
θ
i
A
can be evaluated with this equation whatever the
D
θ
(θ)
relation looks like,
but
it is not an intrinsic stone property because [9.38] shows that it also depends on
initial water content and boundary conditions.
9.3.5. Vapor water transfers: coupling
The theory presented in section 9.3 is directly applicable whenever a
liquid
supply source plays a major role in water transfer for a stone's pathological
situation. For other cases (no liquid water supply, low stone water contents, high
temperature gradients) transfer of water under its
vapor
phase may also be
considered and, correspondingly, the
heat
transfer that substantially influences it.
We will not explain the corresponding mathematical formulations here that are
similar to those presented so far because the phenomena are also of a diffusive
nature. We suggest the reader interested in these issues refers to the literature [CRA
96, DAI 96, LAU 96a, LAU 01] for an exhaustive presentation of these coupled
phenomena.
9.4. Bibliography
[BOU 79] B
OUSQUIÉ
P., Texture et porosité de roches calcaires, Doctorate thesis, École des
Mines, Paris, 1979.
[CAM 98] C
AMUFFO
D.,
Microclimate for Cultural Heritage
, Elsevier, Netherlands, 1998.
[CHA 98] C
HABAS
A., Rôle de l'environnement atmosphérique marin dans la dégradation des
marbres et du granite de Delos (Cyclades, Grèce), Doctorate thesis, University of Paris
13, 1997.
[CHE 99] C
HÉNÉ
G., Modélisation physique des transferts hydriques dans un bloc de tuffeau,
Doctorate thesis, University of Nantes, 1999.
[CRA 96] C
RAUSSE
P.,
L
AURENT
J.P.,
P
ERRIN
B., “Influence des phénomènes d'hystérésis sur
les propriétés hydriques de matériaux poreux. Comparaison de deux modèles de
simulation du comportement thermohydrique de parois de bâtiment”,
Revue Générale de
Thermique
, vol. 35, pp 95-106, 1996.
[DAI 96] D
AÏAN
J.
F.,
L
AURENT
J.
P., “Structure poreuse et transport d'humidité dans les
roches”, in: R.A. L
EFÈVRE
(ed.),
Scienze e Materiali del Patrimonio Culturale (1): la
Pietra dei Monumenti nel suo Ambiente Fisico
, Istituto Poligrafico e Zecca dello Stato,
Libreria dello Stato, Rome, It, pp. 83-112, 1996.
