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//Example 2-6 The Capillary Rise of Water in Tube
D = 0.6 //diameter of glass tube [mm]
T = 20 //temperature of water [degree C]
sigma_s = 0.073 //surface tension of water at 20C [N/m]
rho = 1000 //density of water [kg/m^3]
g = 9.81 //gravitational acceleration [m/s^2]
phi = 0 //contact angle for water and glass [degree]
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