From 4e7235a05f30f56a6715cbe9f2268ab68bb33f20 Mon Sep 17 00:00:00 2001
From: Roman Winter <roman.winter@iws.uni-stuttgart.de>
Date: Wed, 13 Dec 2023 11:29:59 +0000
Subject: [PATCH] [doc][fluidmatrixinteractions] add brief and detail
 description for dispersion

---
 doc/doxygen/groups/material.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/doxygen/groups/material.md b/doc/doxygen/groups/material.md
index 6a245aad9e..2d79003b36 100644
--- a/doc/doxygen/groups/material.md
+++ b/doc/doxygen/groups/material.md
@@ -87,7 +87,8 @@ The following laws are implemented:
 @ingroup Fluidmatrixinteractions
 
 @defgroup DispersionTensors Dispersion Tensors
-@brief Dispersion Tensors
+@brief Dispersion Tensors for calculating the dispersion in all spatial dimensions
+@details Dispersion is caused by particles traveling with different velocity through the porous medium. A particle in the middle of a pore has a higher velociy than a particle close to the grain. Additionaly, due to the tortuosity of the porous medium particles have to take different paths through it. This leads to an effect, which is like an enhanced diffusion, equalizing concentration gradients. 
 @ingroup Fluidmatrixinteractions
 
 @defgroup PoreNetwork Pore Network
-- 
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