Summary The evolution of the geometry of blobs is observed during displacements in a two-dimensional (2D) transparent micromodel, and such macroscopic parameters as pressure drop and recovery are monitored simultaneously. The results are in good agreement with experiments performed in real media and with theoretical calculations of the conditions required for blob mobilization when the presence of loops in the structure is taken into account.
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Lenormand et al. (1988) studied this question.
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