Centrifugal spinning of viscoelastic nanofibres

The centrifugal spinning method is a recently invented technique to extrude polymer melts/solutions into ultra-fine nanofibres. Here, we present superior integrated string-based mathematical model, quantify the nanofibre fabrication performance in process. Our model enables us analyse critical flow parameters covering an extensive range, by incorporating angular momentum equations, Giesekus viscoelastic constitutive air-to-fibre drag effects and energy equation string equations. Using can dynamic behaviour of melt/solution jets through dimensionless parameters, namely, Rossby ( $Rb$ ), Reynolds $Re$ Weissenberg $Wi$ Weber $We$ Froude $Fr$ air Péclet $Pe^*$ ) $Re^*$ numbers as well viscosity ratio $\delta _s$ corresponding rotational, inertial, viscous, viscoelastic, surface tension, gravitational, thermal diffusivity, aerodynamic effects. We find that nonlinear rheology remarkably affects fibre trajectory, radius normal stresses. Increasing leads thicker fibre, whereas increasing shows opposite trend. In addition, , curvature enhanced, causing spiral closer rotation centre.