Research Article

Using Dimensionless Numbers to Predict Centrifugal Jet-Spun Nanofiber Morphology

Table 1

Composition and dimensionless parameter values for all PCL solutions and fibers obtained from the small-scale CJS prototype.

PCL conc.
(/) %
Rotational speed
(rpm)
Dynamic (shear) viscosity

(Pa·s)
Surface tension

(N·m-1)
Density

(kg·m-3)
Jet speed

(m·s-1)
Weber number
Reynolds number
Capillary number
Fiber feature from SEM images

410,00013.61413.4333.7012.27Fiber+beads
15,0000.14880.0165145020.42930.2250.5518.40Fiber+beads
20,00027.231653.7267.4024.54Fiber+beads
25,00034.032583.9384.2530.67Fiber+beads

510,00013.61392.0624.0616.30Fiber+beads
15,0000.20990.0175146020.42882.1336.0924.45Fiber+beads
20,00027.231568.2348.1132.60Fiber+beads
25,00034.032450.3660.1440.74Fiber+beads

610,00013.61376.7918.5020.37Fiber+few beads
15,0000.27660.0185148020.42847.7927.7530.55Fiber+few beads
20,00027.231507.1837.0040.73Fiber+few beads
25,00034.032354.9746.2650.91Fiber+few beads

710,00013.61371.7713.1228.35Fiber
15,0000.39810.0191151020.42836.4719.6742.52Fiber
20,00027.231487.0626.2356.69Fiber
25,00034.032323.5332.7970.86Fiber

810,00013.61359.066.5854.53Fiber
15,0000.80870.0202154020.42807.889.8881.80Fiber
20,00027.231436.2313.17109.06Fiber
25,00034.032244.1116.46136.33Fiber