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Introduction to Microfluidics - KATE.pptx - McGill University

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Capillary Phenomenon<br />

Pressure of the liquid column:<br />

ΔP = ρgh<br />

θ<br />

r<br />

Capillary pressure: ΔP<br />

= −<br />

γ : Surface tension<br />

Height of liquid column:<br />

θ<br />

: Contact angle<br />

h<br />

=<br />

2γ<br />

r<br />

2γ cosθ<br />

ρgr<br />

h<br />

30

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