| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308860 |
| ISSN: | 0104-6632 |
| Autors: | Maia, M.C.A1 Gasparetto, C.A2 |
| Institucions: | 1Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil 2Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos, Campinas, Sao Paulo. Brasil |
| Any: | 2003 |
| Període: | Jun |
| Volum: | 20 |
| Número: | 2 |
| Paginació: | 201-211 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Continuity and momentum equations applied to the entrance region of an axial, incompressible, isothermal, laminar and steady flow of a power-law fluid in a concentric annulus, were solved by a finite difference implicit method. The Newtonian case was solved used for validation of the method and then compared to reported results. For the non-Newtonian case a pseudoplastic power-law model was assumed and the equations were transformed to obtain a pseudo-Newtonian system which enabled its solution using the same technique as that used for the Newtonian case. Comparison of the results for entrance length and pressure drop with those available in the literature showed a qualitative similarity, but significant quantitative differences. This can be attributed to the differences in entrance geometries and the definition of asymptotic entrance length |
| Disciplines | Química |
| Paraules clau: | Ingeniería química, Geometrías anulares, Fluidos no newtonianos, Velocidad, Presión, Pseudoplásticos |
| Keyword: | Chemistry, Chemical engineering, Annular geometries, Non Newtonian fluids, Velocity, Pressure, Pseudoplastics |
| Text complet: | Texto completo (Ver HTML) |
