From 0379edcf0e3183597a91bfe362f45d604fbda5e8 Mon Sep 17 00:00:00 2001
From: Wenqing Wang <wenqing.wang@ufz.de>
Date: Sun, 7 Mar 2021 11:11:32 +0100
Subject: [PATCH] [Doc] Added a description of VapourDiffusionPMQ
---
.../VapourDiffusion/VapourDiffusionPMQ.h | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/MaterialLib/MPL/Properties/VapourDiffusion/VapourDiffusionPMQ.h b/MaterialLib/MPL/Properties/VapourDiffusion/VapourDiffusionPMQ.h
index 9a1654d9c3f..e727f50874d 100644
--- a/MaterialLib/MPL/Properties/VapourDiffusion/VapourDiffusionPMQ.h
+++ b/MaterialLib/MPL/Properties/VapourDiffusion/VapourDiffusionPMQ.h
@@ -17,6 +17,30 @@ namespace MaterialPropertyLib
{
class Phase;
+/**
+ * \brief The Penman-Millington-Quirk (PMQ) Vapour diffusion model.
+ *
+ * The model was presented in \cite chau2005simulation
+ *
+ * The vapour diffusion can be described by
+ * \cite moldrup1997modeling, \cite moldrup2000predicting,
+ * \cite chau2005simulation
+ * \f[
+ * D_v=2.16\cdot 10^{-5} \left(\frac{T}{273.15}\right)^{1.8}
+ * D_{vr},
+ * \f]
+ * where \f$D_{vr}\f$ is the the relative diffusion coefficient,
+ * and \f$T\f$ is the temperature.
+ *
+ * In the PMQ type, \f$D_{vr}\f$ takes the form of \cite chau2005simulation
+ * \f[
+ * D_{vr}=0.66 \phi (1 - S_L )^2,
+ * \f]
+ * with \f$\phi\f$, the porosity, \f$S_L\f$, the water saturation, \f$0.66\f$
+ * the tortuosity constant.
+ *
+ */
+
class VapourDiffusionPMQ final : public Property
{
public:
--
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