Discretized modeling for centrifugal spinning of viscoelastic liquids

A comprehensive mathematical model for nanofibre formation in centrifugal spinning methods

“…Figure 3 illustrates the fibre trajectory produced using different experimental observations versus the model simulation results. As can be seen, our model can reasonably predict the fibre trajectory, not only for our experiments but also for those of Divvela et al (2017). The deviation of the numerical results from those of the experiments may be attributed to excluding the effects of viscoelasticity or could be due to variations in the flow rate of the polymer solution in the experiments.…”

“…The main results to be compared between our model and experiments are the fibre trajectory and radius, which are affected by inertial, viscous, centrifugal, Coriolis and surface forces as well as the solvent evaporation. To this end, we use the data extracted from our experimental images as well as the results of Divvela et al (2017). Figure 3 illustrates the fibre trajectory produced using different experimental observations versus the model simulation results.…”

Using Dimensionless Numbers to Predict Centrifugal Jet-Spun Nanofiber Morphology

“…The use of computational models as a theoretical platform to understand the jet trajectory that occurs during the spinning process has been previously reported [42][43][44][45]. Divvela et al studied the effects of polymer jet trajectory and diameter in the CJS process, and they reported similar findings where a decreasing Re resulted in the reduced thinning of the fibers [42]. This effect was attributed to the increase in viscous force that inhibits the extension of the polymer jet.…”

“…CJS is one such emerging technique that can be industrially scaled-up for large-scale nanofiber fabrication at low costs [9,10,14,25]. Only a few studies exist that have investigated the factors involved in the CJS fabrication process experimentally [3,8,[12][13][14][15]17], with some focused on computational modelling [42][43][44][45]. However, these studies focused on fibers that were deposited on a collector placed away from the reservoir.…”

A study of rheological limitations in rotary jet spinning of polymer nanofibers through modeling and experimentation

“…Studies to date include a simple model for fiber size estimation from Mellado et al . and several models for trends in fiber diameter and trajectories, including models comparing Newtonian and non‐Newtonian viscoelastic flow behavior . These studies have exclusively analyzed fiber characteristics, such as trajectory and regions of fiber size reduction within the trajectory arc; however, they have not discussed the effect of changing rheological properties and their effect on spinnability (these studies invariably assumed that the polymer will produce a fiber, while this in practice is often not the case).…”