Draft: Add Correction factor to outflow boundary

In https://www.sciencedirect.com/science/article/pii/S0898122123005904 a correction factor for the outflow boundary condition is shown. This correction factor aims to add a condition on the density/pressure, which ensures that the density stays close to a user input.

doc/sphinx/lbmpy.bib

@@ -124,10 +124,22 @@ url = {https://doi.org/10.1016/j.jcp.2017.05.040},
 doi = {10.1016/j.jcp.2017.05.040},
 journal = {J. Comput. Phys.},
 month = {nov},
-pages = {862–888},
+pages = {862-888},
 numpages = {27}
 }
 
+@article{Alihussein2024,
+author = {Alihussein, Hussein and Prasannakumar, Adarsh and Geier, Martin and Krafczyk, Manfred},
+title = {{Direct cumulant lattice Boltzmann simulations of transitional flow in gyroidal structures including experimental validation}},
+journal = {Computers & Mathematics with Applications},
+volume = {157},
+pages = {159-172},
+year = {2024},
+issn = {0898-1221},
+doi = {10.1016/j.camwa.2023.12.029},
+url = {https://www.sciencedirect.com/science/article/pii/S0898122123005904},
+}
+
 @Article{Coreixas2019,
   title = {Comprehensive comparison of collision models in the lattice Boltzmann framework: Theoretical investigations},
   author = {Coreixas, Christophe and Chopard, Bastien and Latt, Jonas},