Viscous fingering in a wedge

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Abstract
The selection of self-similar fingers growing in a wedge is examined numerically both in the convergent and divergent flow regime. For divergent flows, a bifurcation occurs in the spectrum of the relative finger width λ versus σ, the effective surface tension parameter, when it is very small (σ0.005), a universal selection law is revealed numerically for any sector value, in both growth regimes.

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