diff --git a/tex/mesh.tex b/tex/mesh.tex
index 2a32fd42da8efaf4d70d9cc6192e2e1efdb7061e..ad401d03d691dba38ec6f12487194b365b821271 100644
--- a/tex/mesh.tex
+++ b/tex/mesh.tex
@@ -5,6 +5,7 @@
 \docStart
 \section{Mesh}
 
+The center of the coordination system is chosen in the center of the cylinder.
 For the mesh the domain was divided into 5 subdomains.
 One subdomain consists of the \SI{1.8}{\metre} on the side of the outlet without the cylinder.
 On this part (called \enquote{pipe}) the grading is chosen in a way that the cells closest to the cylinder are smaller than those at the outlet and almost of the same size as the neigboring cells in the neigboring subdomain.