| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308881 |
| ISSN: | 0104-6632 |
| Autors: | Polizelli, M.A1 Menegalli, F.C2 Telis, V.R.N Telis-Romero, J |
| Institucions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Departamento de Engenharia e Tecnologia de Alimentos, Sao Jose do Rio Preto, Sao Paulo. Brasil 2Universidade Estadual de Campinas, Departamento de Engenharia de Alimentos, Campinas, Sao Paulo. Brasil |
| Any: | 2003 |
| Període: | Dic |
| Volum: | 20 |
| Número: | 4 |
| Paginació: | 455-463 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Data on pressure drop were obtained in stainless steel, sanitary fittings and valves during laminar and turbulent flow of aqueous solutions of sucrose and xanthan gum, which were selected as model fluids. The rheological properties of these solutions were determined and the power-law model provided the best fit for experimental data. Friction losses were measured in fully and partially open butterfly and plug valves, bends and unions. Values of loss coefficients (kf) were calculated and correlated as a function of the generalized Reynolds number by the two-k method. The model adjustment was satisfactory and was better in the laminar flow range (0.976 < r2 < 0.999) than in the turbulent flow range (0.774 < r2 < 0.989). In order to test the adequacy of the results for predicting loss coefficients during flow of real fluids, experiments were conducted with coffee extract. Comparison between experimental and predicted loss coefficients showed very good agreement |
| Disciplines | Química |
| Paraules clau: | Ingeniería química, Reología, Fluidos no newtonianos, Factor de fricción, Caída de presión, Coeficientes de pérdida |
| Keyword: | Chemistry, Chemical engineering, Rheology, Non Newtonian fluids, Friction factor, Pressure drop, Loss coefficients |
| Text complet: | Texto completo (Ver HTML) |
