Abstract
In this paper a new method for calculating viscoelastic fluidflows is presented. The polymer stress is not calculated from a closedform constitutive equation but from a microscopic model. Instead ofconsidering the motion of individual molecules we calculate the evolutionof an ensemble of configuration fields, representing the internal degreesof freedom of a model molecule. The configuration fields are deformedand convected by the flow and are exposed to thermal motion. The fielddescription is incorporated in a finite element calculation of the flow fieldwhere the stress in the fluid is now obtained from an average taken overall the configuration fields. The results for flow past a cylinder for aHookean dumbbell suspension will be compared with the results obtainedfrom a fully macroscopic calculation o! f the equivalent Oldroyd-B model.Excellent agreement is obtained.
| Original language | English |
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| Pages (from-to) | 205-217 |
| Journal | Macromolecular Symposia |
| Volume | 121 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1997 |