Dewetting Newtonian fluid

Fig. 3 Late stages of dewetting of a Newtonian fluid on a substrate with (a) non-slip and (b) slip boundary conditions ...

Seminal work has been performed by Brochard-Wyart and colleagues [110-113, 144, 145] on dewetting of thin polymer films with thicknesses smaller than the slip length b (high-slip regime). Assuming a Newtonian fluid, they have determined a characteristic length Aq = (ho b) = which is related to the transition... 

As in dewetting experiments with simple (Newtonian) fluids, one can also measure the width w of the rim. To do this, the exponential decay is truncated when the height of the rim (measured from the substrate level) has decayed to a value about 1.1 ho. Then, according to theory [42,44,46,47], w = v/2 Aq ln(10f/T), with T being a characteristic relaxation time of the polymer. As can be seen in... 

The dewetting films above were treated as a continuum, i.e a fluid without (micro)structure. However, in most applications the coating fluids are suspensions which contain particles and often macromolecules. The fluids also behave as non-Newtonian. 

---