Derive a formula for the time required for the interface to advance a certain distance, say L *. What is this time if the blood viscosity is 0.003...

Derive a formula for the time required for the interface to advance a certain distance, say L*. What is this time if the blood viscosity is 0.003 Pa-s, the surface tension is 0.050 N/m, the contact angle is 85°, the channel width is 0.001 m, and L* is 0.03 m?