Capillary Burst Valve Pressure Calculator

Centrifugal Microfluidics & Lab-on-a-Disc: Compute capillary burst pressure ($P_b$), meniscus contact angle pinning, and critical rotational spin speed ($\omega_b$).

Microvalve & Disc Parameters

Valve Width $w$ ($\mu\text{m}$):

Valve Depth $h$ ($\mu\text{m}$):

Advancing Contact Angle $\theta_A$ (deg):

Surface Tension $\gamma$ (mN/m):

Expansion Angle $\beta$ (deg):

Disc Radial Position $r$ (mm):

Liquid Column Radial Length $\Delta r$ (mm):

Capillary Burst & Spin Thresholds

Burst Pressure ($P_b$)

-- kPa

Critical Spin (RPM)

-- RPM

Angular Speed ($\omega$)

-- rad/s

Centrifugal Head ($g$)

-- g

Meniscus Pinning Thermodynamics

• Pinned Contact Angle ($\theta_p = \min(180^\circ, \theta_A + \beta)$): -- °

• Lateral Capillary Pressure: -- kPa

• Vertical Capillary Pressure: -- kPa

• Gibbs Condition: Pinning active at sharp corner edge

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Capillary Burst Valve Pressure Calculator

Microvalve & Disc Parameters

Capillary Burst & Spin Thresholds

Meniscus Pinning Thermodynamics

Frequently Asked Questions