Pattern formation by injection of air in a non-Brownian suspension

The paper is organized as follows. In Sec.2 we will recall the basic equations for the Saffman-Taylor instability. Sec. 3 describes the set-up and experimental methods. In Sec. 4, the experimental results concerning the rheology of suspensions and the Darcy’s law are presented and discussed. In Sec. 5, we interest ourselves at the finger shape as well as the finger width. Sec. 6 gives a summary of the obtained results.