Phenomenological theory for polymer diffusion in non-homogeneous velocity-gradient flows
| ISSN: |
1435-1528
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| Keywords: |
Polymer migration ; diffusion ; thermodynamics ; velocity-gradient flow ; generalized hydrodynamics
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Chemistry and Pharmacology
Physics
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| Notes: |
Abstract The present study concerns the phenomenon of flow-induced polymer migration. It is shown that Tirrell's diffusion flux can be deduced from a macroscopic modelling which involves second-order gradients and a vectorial internal variable related to the microstructure. In contrast to Tirrell's model, however, a migration may also occur across straight streamlines. The flow down an inclined plane is examined by way of example. The roles played by the microstructure and the second gradients, respectively, are thus exhibited.
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| Type of Medium: |
Electronic Resource
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| URL: |