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Holography; velocity measurements; laminar flow in microchannel.

In the present study, a digital holography microscope has been developed to study instantaneous 3D velocity field in a square channel of 1000 × 1000 $\mu𝑚^2$ cross-section. The flow field is seeded with polystyrene microspheres of size $d_p = 2.1$ 𝜇m. The volumetric flow rate is set equal to 20 𝜇l/min. The instantaneous 3D velocity field is obtained by correlating the particles obtained from the 3D numerical reconstruction of holograms using particle tracking velocimetry (PTV).

Dhananjay Kumar Singh¹ P K Panigrahi^{1 2}

1. Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208 016, India
2. Centre for Lasers and Photonics, Indian Institute of Technology, Kanpur 208 016, India

Published

February 2014

Early published

13 February 2014