Skip to main content
SpringerLink
Log in

Necking in isothermal melt spinning and its connection to the vortex formation in entrance flow

  • Published:
Korean Journal of Chemical Engineering Aims and scope Submit manuscript

Abstract

We derive the necking condition in isothermal melt spinning employing the model of convected Maxwell fluids with strain-rate dependent material relaxation time. It is found that necking is possible when the extensional viscosity is strain-thinning (strain-softening), and impossible when the extensional viscosity is strain-thickening (strain-hardening). This finding then immediately reveals the correspondence between the spinning process and entrance flow (contraction flow), as several recent articles show that vortex is formed in the entrance flow when the extensional viscosity is strain-thickening. Thus necking in spinning corresponds to no vortex in entrance flow, whereas no net king in spinning to vortex in entrance flow, for the flow mechanism of the both situations is the extensional flow whose behavior is determined by the extensional viscosity.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Vincent, P.I.:Polymer,1, 7 (1960).

    Article  CAS  Google Scholar 

  2. Wada, Y.:J. Appl. Poly. Sci.,15, 183 (1971).

    Article  CAS  Google Scholar 

  3. Ziabicki, A.: “Fundamentals of Fibre Formation”, John Wiley & Sons, New York, p. 69 (1976).

    Google Scholar 

  4. Kase, S.:Proceedings of Poly. Processing Soc., No. 3/17, Orlando, (1988).

  5. Maeda, Y.: Proceedings of Poly. Processing Soc., No. 3/18, Orlando, (1988).

  6. Kikutani, I., et al.: Proceedings of Poly. Processing Soc.,No. 3/19, Orlando, (1988).

  7. Hyun, J.C.:AIChE J.,24, 418 (1978).

    Article  CAS  Google Scholar 

  8. Hyun, J.C. and Ballman, R.L.:J. Rheology,22, 349 (1978).

    Article  Google Scholar 

  9. Hyun, J.C.:Polymer (Korea),12, 772, (1988).

    Google Scholar 

  10. Ide, Y. and White, J.L.:J. Non-Newtonian Fluid Mech,2, 281 (1977).

    Article  CAS  Google Scholar 

  11. Denn, M.M. and Marrucci, G.:AIChE J.,17, 101 (1971).

    Article  CAS  Google Scholar 

  12. Chen, I.-J., et al.:Transactions of Soc of Rheolo-gy,16, 473 (1972).

    Article  CAS  Google Scholar 

  13. Kanai, T. and White, J.L.:Poly. Eng. & Sci.,24, 1185(1984).

    Article  CAS  Google Scholar 

  14. Tsou, J.-D. and Bogue, D.C.:J. Non-Newtonian Fluid Mech.,17, 331,(1985).

    Article  CAS  Google Scholar 

  15. Minoshima, W. and White, J.L.:J. Non-Newtonian Fluid Mech.,19, 275 (1986).

    Article  CAS  Google Scholar 

  16. White, S.A., Gotsis, A.D., and Baird, D.G.:J. NonNewtonian Fluid Mech.,24, 121, (1987).

    Article  CAS  Google Scholar 

  17. Binding, D.M.:J. Non-Newtonian Fluid Mech.,27, 173(1988).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemical Engineering, Korea University, Anam-Dong, Sungbuk-Ku, Seoul, Korea

    Jae Chun Hyun

Authors
  1. Jae Chun Hyun
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hyun, J.C. Necking in isothermal melt spinning and its connection to the vortex formation in entrance flow. Korean J. Chem. Eng. 6, 246–253 (1989). https://doi.org/10.1007/BF02697687

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02697687

Keywords

Search

Navigation