Viscosity measurements of liquid toluene at low temperatures using a dual vibrating-wire technique

• Autor(a) principal: Oliveira, Carla Padrel de
• Data de Publicação: 2004
• Outros Autores: Caetano, Fernando J. P., Mata, José L. Correia da, Fareleira, João M. N. A., Wakeham, William A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.2/2077
• topic: Dual vibrating-wire technique; Low temperature; Toluene; Viscosity

A recently developed dual vibrating-wire technique has been used to perform viscosity measurements of liquid toluene in the temperature range 213 K ≤ T ≤ 298 K, and at pressures up to approximately 20 MPa. The results were obtained by operating the vibrating-wire sensor in both forced and free decay modes. The estimated precision of the viscosity measurements, in either mode of operation, is ±0.5%, for temperatures above or equal to 273 K, increasing with decreasing temperature up to ±1% at 213 K. The corresponding overall uncertainty is estimated to be within ±1% and ±1.5%, respectively.