Difference between revisions of "Ball Drop"
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<center><code>V=sqrt(4*g*d(rhos-rho)/rho/(3*Cd))</code></center> | <center><code>V=sqrt(4*g*d(rhos-rho)/rho/(3*Cd))</code></center> | ||
| + | [https://en.wikipedia.org/wiki/Terminal_velocity Terminal velocity - follow wikipedia] | ||
where | where | ||
| Line 17: | Line 18: | ||
<code>rho</code> - density of fluid | <code>rho</code> - density of fluid | ||
| − | <code>Cd</code> - drag coefficient | + | <code>Cd</code> - drag coefficient ([https://en.wikipedia.org/wiki/Drag_coefficient Drag coefficient - follow wikipedia]), calculated as: |
| + | |||
| + | <center>[[File:Drag_vs_re.png]]</center> | ||
Revision as of 09:37, 3 September 2018
Ball-Drop Multistage Fracturing
Equation used to calculate ball speed in fluid:
V=sqrt(4*g*d(rhos-rho)/rho/(3*Cd))Terminal velocity - follow wikipedia
where
V - Velocity
g - gravitational accelerations
d - diameter of spherical object
rhos - density of object
rho - density of fluid
Cd - drag coefficient (Drag coefficient - follow wikipedia), calculated as:
