Viscosidade a resistncia deformao dos fluidos em movimento no se manifesta se o fluido se encontrar em repouso. Desalination 59, 219–240.įor kinematic viscosity Chen et al. Figura 1 - Componentes normal e tangencial de uma fora. Experimental methods for determination of the properties of saline water. Physical properties of seawater solutions. With the wide range of answers that you get from repeated lab measurement and/or using various equations, it is generally best to pick a single method and pretend that you believe it-repeatable results will not be available for viscosity measurements.īased on Isdale, J.D., Spencer, C.M., Tudhope, J.S. None of the empirical methods provide results that match field conditions when there is any acid gas in a gas stream, and the equations of state methods are not a lot better for acid gases. The various methods can vary by more than 20% one from the next for the same fluid. viscosidade dinmica,, pode ser obtida pela multiplicao da viscosidade cinemtica medida pela massa especfica,, do lquido, determinada na mesma. Desde os primrdios do desenvolvimento cientfico uma das bases do conhecimento humano a anlise das substncias que compem a natureza e a quantificao de suas propriedades, uma destas propriedades a viscosidade que pode ser encarada como o atrito interno dos lquidos, isto, o atrito que as vrias camadas de um lquido encontram ao escoarem uma sobre as outras.
temperatura, tempo, torque, velocidade, viscosidade, volume e capacidade. It can also be predicted through an equation of state or one of many empirical relationships. cinemtica de fluidos, o estudo de fluidos em movimento e dinmica de. One of the tubes is rotated and the amount of force that it takes to rotate at a fixed angular velocity is proportional to the dynamic viscosity. 4.1.1.1 Dynamic viscosity (μ)ĭynamic viscosity can be determined via an apparatus that has concentric tubes whose annular space can be filled with the fluid under test. Kinematic viscosity can be thought of as resistance to fluid momentum. Dynamic (or absolute) viscosity is an expression of a fluid’s ability to resist shear flows. Viscosity is a measure of the ability of a fluid to resist shear forces. Tabela 1.4 Viscosidade dinmica e cinemtica de oito fluidos a 1 atm e 20 C Fluido m, kg/(m s) Razo m/m(H2) r kg/m3 m2/s Razo /(Hg) Hidrognio 9,0. Simpson P.E., in Practical Onshore Gas Field Engineering, 2017 4.1.1 Viscosity
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