Unsteady flow of Oldroyd-B fluids in an uniform rectilinear pipe using 1D models
Using the one-dimensional approach based on the director theory which reduces the exact threedimensional equations to a system depending only on time and on a single spatial variable, we analyze the axisymmetric unsteady flow of an incompressible viscoelastic fluid of Oldroyd type in an uniform rect...
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| Formato: | article |
| Idioma: | por |
| Publicado em: |
2012
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| Texto completo: | http://hdl.handle.net/10174/5555 |
| País: | Portugal |
| Oai: | oai:dspace.uevora.pt:10174/5555 |
| Resumo: | Using the one-dimensional approach based on the director theory which reduces the exact threedimensional equations to a system depending only on time and on a single spatial variable, we analyze the axisymmetric unsteady flow of an incompressible viscoelastic fluid of Oldroyd type in an uniform rectilinear pipe with circular cross-section. From this system we obtain the relationship between average pressure gradient and volume flow rate over a finite section of the pipe and the corresponding equation for the wall shear stress. Attention is focused on the steady flow case with rigid and impermeable walls. |
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