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Module 2: Fundamentals of Microfluidic Systems

20262m

Which parameter is particularly important in determining the flow regime inside a microfluidic channel?

(i) Reynolds number
(ii) Atomic number
(iii) Optical wavelength only
(iv) Melting point

Worked SolutionAI Assisted

Answer: (i) Reynolds number

Re = ρvD/μ compares inertial to viscous forces. In microchannels Re is usually far below 2000 (often below 1), so the flow is laminar.

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