| Итог: | Viscous flow in the narrow gap between a rigid plate and a confined elastic solid has been observed
to ‘choke’ at high flow rates, due to the deforming solid making contact with the plate and sealing
the gap. When the viscous flow is driven by injection of a gas bubble, the advancing meniscus is
susceptible to the viscous-fingering instability. By comparing fingering experiments with axisymmetric numerical simulations, we demonstrate that, depending on the width of the fingers, the
fingering instability can either promote or suppress choking, i.e. cause the system to choke when an
axisymmetric system would not, or vice versa.
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