Friction losses in valves and fittings for power-law fluids
| Autor: | Marcos Alexandre Polizelli, Vânia Regina Nicoletti Telis, Javier Telis-Romero, Florencia Cecilia Menegalli |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Estadual de Campinas (UNICAMP) |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Pressure drop
Friction factor loss coefficients Materials science Turbulence General Chemical Engineering Flow (psychology) Plug valve Reynolds number Thermodynamics lcsh:TP155-156 Laminar flow non-Newtonian fluids Non-Newtonian fluid friction factors Physics::Fluid Dynamics symbols.namesake Rheology symbols lcsh:Chemical engineering pressure drop |
| Zdroj: | Brazilian Journal of Chemical Engineering v.20 n.4 2003 Brazilian Journal of Chemical Engineering Associação Brasileira de Engenharia Química (ABEQ) instacron:ABEQ SciELO Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Brazilian Journal of Chemical Engineering, Volume: 20, Issue: 4, Pages: 455-463, Published: OCT 2003 Brazilian Journal of Chemical Engineering, Vol 20, Iss 4, Pp 455-463 (2003) ResearcherID |
| ISSN: | 0104-6632 |
| Popis: | Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:02:14Z No. of bitstreams: 1 S0104-66322003000400012.pdf: 441341 bytes, checksum: 7a3cda28424d635ba4175a953fae0b70 (MD5) Made available in DSpace on 2013-08-22T19:02:14Z (GMT). No. of bitstreams: 1 S0104-66322003000400012.pdf: 441341 bytes, checksum: 7a3cda28424d635ba4175a953fae0b70 (MD5) Previous issue date: 2003-10-01 Made available in DSpace on 2013-09-30T20:03:00Z (GMT). No. of bitstreams: 2 S0104-66322003000400012.pdf: 441341 bytes, checksum: 7a3cda28424d635ba4175a953fae0b70 (MD5) S0104-66322003000400012.pdf.txt: 29531 bytes, checksum: 8c53f3854be1ff4cb6523edf848b3fe1 (MD5) Previous issue date: 2003-10-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:16:09Z No. of bitstreams: 2 S0104-66322003000400012.pdf: 441341 bytes, checksum: 7a3cda28424d635ba4175a953fae0b70 (MD5) S0104-66322003000400012.pdf.txt: 29531 bytes, checksum: 8c53f3854be1ff4cb6523edf848b3fe1 (MD5) Made available in DSpace on 2014-05-20T15:16:09Z (GMT). No. of bitstreams: 2 S0104-66322003000400012.pdf: 441341 bytes, checksum: 7a3cda28424d635ba4175a953fae0b70 (MD5) S0104-66322003000400012.pdf.txt: 29531 bytes, checksum: 8c53f3854be1ff4cb6523edf848b3fe1 (MD5) Previous issue date: 2003-10-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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 (k f) 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. Universidade Estadual Paulista Departamento de Engenharia e Tecnologia de Alimentos Universidade Estadual de Campinas Departamento de Engenharia de Alimentos Universidade Estadual Paulista Departamento de Engenharia e Tecnologia de Alimentos |
| Databáze: | OpenAIRE |
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