Rheologica Acta

, Volume 29, Issue 3, pp 175–181 | Cite as

Anisotropic conduction of heat caused by molecular orientation in a flowing polymeric liquid

  • B. H. A. A. van den Brule
  • P. J. Slikkerveer
Original Contributions


To demonstrate the influence of molecular orientation on the heat conduction in a flowing polymeric liquid, we consider a variant of the Graetz-Nusselt problem. A polymeric liquid is flowing between two flat, parallel plates with a sudden change in the wall temperature. The temperature distribution in the entrance region is calculated numerically taking viscous dissipation into account. It is assumed that the material properties are independent of the temperature. It is shown that the change in the temperature distribution in the fluid caused by molecular orientation is large enough to affect polymer processing significantly.

Key words

Anisotropy thermalconductivity orientation Graetz-Nusselt problem polymer processing 


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Copyright information

© Steinkopff 1990

Authors and Affiliations

  • B. H. A. A. van den Brule
    • 1
  • P. J. Slikkerveer
    • 1
  1. 1.Philips Research LaboratoriesJA-EindhovenThe Netherlands

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