Table 3 Process parameters of the industrial dry spinning setup (cf. Fig. 1) assuming the airflow without fibers (first step in the fiber-airflow coupling)
From: Industrial dry spinning processes: algorithmic for a two-phase fiber model in airflows
Process parameters | |||
|---|---|---|---|
Description | Symbol | Value | Unit |
Device height | H | 5.1 | m |
Nozzle radius | \(R_{\mathrm{in}}\) | 3.14⋅10−5 | m |
Speed at nozzle | \(u_{\mathrm{in}}\) | 5 | m/s |
Take up speed at bottom | \(u_{\mathrm{out}}\) | 10 | m/s |
Polym. mass fract. at nozzle | \(c_{\mathrm{in}}\) | 0.29 | – |
Temperature at nozzle | \(T_{\mathrm{in}}\) | 348.15 | K |
Total number of fibers | M | 60 | – |
Heat transfer at nozzle | \(\alpha _{\mathrm{in}}\) | 5.11⋅102 | W/(m2K) |
Mass transfer at nozzle | \(\gamma _{\mathrm{in}}\) | 1.64 | kg/(m2s) |
Air pressure at nozzle | \(p_{\star ,\mathrm{in}}\) | 1.01⋅105 | Pa |
Air thermal cond. at nozzle | \(\lambda _{\star ,\mathrm{in}}\) | 2.42⋅10−2 | W/(m K) |
Air kin. viscosity at nozzle | \(\nu _{\star ,\mathrm{in}}\) | 1.46⋅10−5 | m2/s |
Air spec. heat cap. at nozzle | \(q_{\star ,\mathrm{in}}\) | 1.01⋅103 | J/(kg K) |
Air density at nozzle | \(\rho _{\star ,\mathrm{in}}\) | 1.23 | kg/m3 |
Diluent diffusion in air at nozzle | \(D_{d,\star ,\mathrm{in}}\) | 1.27⋅10−5 | m2/s |