Drop formation in non‐newtonian liquids under pulsed conditions

Drop formation from single nozzles under pulsed flow conditions in non‐Newtonian fluids following the power law model has been studied. An existing model has been modified to explain the experimental data. The flow conditions employed correspond to the mixer—settler type of operation in pulsed sieve‐plate extraction columns. The modified model predicts the drop sizes satisfactorily. It has been found that consideration of non‐Newtonian behaviour is important at low pulse intensities and its significance decreases with increasing intensity of pulsation. Further, the proposed model for single orifices has been tested to predict the sizes of drops formed from a sieve‐plate distributor having four holes, and has been found to predict the sizes fairly well in the absence of coalescence.