On rotationally driven nonlinear inclined polymeric jet with gravity effect

On viscoelastic fiber jet formation by forcespinning at high rotation rate

“…This is a process that has been developed and shown experimentally to generate macro-and nano-fiber jets. So far, there has been a number of studies that were either in theoretical and computational or in experimental areas of the mechanics of rotating fiber jet flows at low or high rotation rates (Sarkar et al, 2010;Vazquez et al, 2012;Altecor et al, 2012;Padron et al, 2013;Taghavi and Larson, 2014a,b;Noroozi et al, 2017Noroozi et al, , 2020Riahi, 2018aRiahi, ,b, 2020Riahi, , 2021Riahi et al, 2018;Riahi and Orizaga, 2022). The studies were needed to understand how to produce fibers for possible use in various applications such as those in defense, energy, aerodynamics and health areas, etc.…”

“…We find useful to briefly state several research investigations that were completed by Riahi and his co-authors (Riahi, 2018a(Riahi, , 2020(Riahi, , 2021Riahi et al, 2018;Riahi and Orizaga, 2022). In the last several years, even though those studies were at a low rotation rate regime because a number of different aspects were rather similar to those presented in this paper, which include methodology and type of the fiber jet determined based on an experimentally tested variable viscosity formula (Riahi et al, 2018;Riahi, 2020;Riahi and Orizaga, 2022) or viscoelastic type of the jet flow (Riahi, 2018a;Riahi, 2021). However, there are some new aspects of our research on the rotating viscoelastic fiber jet that we included in the present investigation.…”

“…We also restrict the jet centerline domain to begin at a location very close to the orifice center but not at a such center in order to avoid possible numerical divergence and singularity there (Taghavi and Larson, 2014a). In addition, in contrast to the previous studies (Riahi, 2018a(Riahi, ,b, 2020(Riahi, , 2021Riahi et al, 2018;Riahi and Orizaga, 2022), we employ proper scaling and perturbation techniques to investigate forcespinning of a three--dimensional nonlinear viscoelastic jet system at high rotation rates, on the basis of full fluid equations of motion and dynamical laws. We were successfully able to determine macro and nano--fiber jet quantities at high rotation rates.…”