6 lines
179 B
Python
6 lines
179 B
Python
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import numpy as np
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c_d = 0.47 # drag coefficient balloon (spherical) [-]
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def drag(c_d, rho_air, d_b, v_z):
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return 0.125 * np.pi * c_d * rho_air * (d_b * v_z) ** 2
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