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Core/sheath laminar flows in the microfluidic spinneret with constant total flow rate of 300 µL/min and varied sheath/core flow ratio of (A) r = 0.5; (B) r = 2; (C) r = 20. (D) Core/sheath laminar flow with a total flow rate of 1000 μL/min (r = 200). (E) Comparison of experimental values with simulated boundaries.
