online_fall_velocity: Fall velocity of a spherical sediment particle
This program calculates the fall velocity [w] of a spherical sediment particle using an iterative procedure, with the following steps:
- The particle Reynolds number [R] is assumed equal to 100.
- For the given Reynolds number, the drag coefficient CD is obtained from Fig. 15-1 in the text, assuming a spherical particle.
- The fall velocity is calculated with Eq. 15-2, assuming γs = 2.65 (quartz particles).
- The particle Reynolds number is calculated with Eq. 15-3.
- The absolute difference between assumed and calculated Reynolds number is compared to a specified tolerance (0.0001).
If the difference is greater than the tolerance, replace assumed with calculated value, and return to Step 2.
- Otherwise, stop and report results of last iteration.
Output is the number of iterations, and the last drag coefficient, particle
Reynolds number, and fall velocity (in m/s or fps) calculated.
Default units is SI (metric). The program can take U.S. Customary units.
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