Conventional viscous fingering flow in radial Hele-Shaw cells employs a constant injection rate, resulting in the emergence of branched interfacial shapes. The search for mechanisms to prevent the development of these bifurcated morphologies is relevant to a number of areas in science and technology.
Alvarez-Lacalle, E. [et al.]. Inhibition of viscous fluid fingering: A variational scheme for optimal flow rates. A: Annual Meeting of the APS Division of Fluid Dynamics. "Archives of the Bulletin of the American Physical Society". San Diego: 2012.