| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000379520 |
| ISSN: | 0103-9733 |
| Authors: | Hernández García, Anier1 Fernández Barbero, Antonio2 Sotolongo Costa, Oscar3 |
| Institutions: | 1University of Copenhagen, Niels Bohr Institute, Copenhague. Dinamarca 2Universidad de Almería, Grupo de Fluídos Complejos, Almería. España 3Universidad Autónoma del Estado de Morelos, Facultad de Ciencias, Cuernavaca, Morelos. México |
| Year: | 2014 |
| Season: | Ago |
| Volumen: | 44 |
| Number: | 4 |
| Pages: | 315-325 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | The problem of oscillating flows inside pipes under periodic forcing of viscoelastic fluids is addressed here. Starting from the linear Oldroyd-B model, a generalized Darcy’s law is obtained in the frequency domain and an explicit expression for the dependence of the dynamic permeability on the fluid parameters and forcing frequency is derived. Previous results in both viscoelastic and Newtonian fluids are here shown to be particular cases of our results. On the basis of our calculations, a possible explanation for the observed damping of local dynamic response as the forcing frequency increases is given. Good fitting with recent experimental studies of wave propagation in viscoelastic media is here exhibited. Sound wave propagation in viscoelastic media flowing inside straight pipes is investigated. In particular, we obtain the local dynamic response for weakly compressible flows |
| Disciplines: | Física y astronomía |
| Keyword: | Dinámica de fluidos, Física de materia condensada, Soluciones viscoelásticas, Propagación de ondas, Ondas sonoras, Modelo de Oldroyd |
| Keyword: | Physics and astronomy, Condensed matter physics, Fluid dynamics, Viscoelastic solutions, Wave propagation, Sound waves, Oldroyd model |
| Full text: | Texto completo (Ver PDF) |
