Model for the Draining Regime

3 Combining Modeis to Describe Simuitaneousiy Both Regimes 

The global evolution of the thickness described by this equation perfectly matches the experimental points, especially at intermediate u values. Because the thickness reaches a minimum value fiomin at an intermediate critical speed Mo the derivative of Eq. (9.18) must be null for u = Mo Withdrawal speed Mc can thus be calculated using relation (9.19) for which d/ o/dM = 0. 

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