Compressibility Factor
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Cálculo do volume na equação de van der Waals pelo método de cardano
Analytical solutions of a cubic equation with real coefficients are established using the Cardano method. The method is first applied to simple third order equation. Calculation of volume in the van der Waals equation of state is afterwards established. These results are exemplified to calculate the volumes below and above critical temperatures. Analytical a
Química Nova. Publicado em: 2010
-
2. Avaliação de Correlações e Equações de Estado para Determinação de Fatores de Compressibilidade de Gás Natural / Compressibility factors for natural gases by correlations and equations of state
O fator de compressibilidade (Z) de gás natural é utilizado em vários cálculos na engenharia de petróleo (avaliação de formações, perda de carga em tubulações, gradiente de pressão em poços de gás, cálculos de balanço de massa, medição de gás, compressão e processamento de gás). As fontes mais comuns de valores de Z são medições exper
Publicado em: 2009
-
3. Estudo de variáveis de composição e processo para controle da compressibilidade
Brake pads for automotive brake systems represent one of the most complex composite materials since they contain many components with widely varying physical and chemical properties. This multiphase nature is necessary to satisfy a wide variety of performance related demands. Processing conditions also have a major influence on the properties of these comple
Publicado em: 2006
-
4. AplicaÃÃo dos mÃtodos de pulso-eco e resonÃncia acÃstica para caracterizaÃÃo nÃo destrutiva de propriedades elÃsticas e microestruturais de vidros especiais e aÃo ferrÃtico degradado por fluÃncia
The elastic properties, homogeneity, attenuation of the propagation of ultrasonic waves and associated structure with some types of special glass were analyzed with the pulse-echo method. A total of seven samples of glass containing neodymium, lead, zirconium and niobium, as additives were analyzed. As a result, elastic constants such as coefficient of Poiss
Publicado em: 2005
-
5. Intrinsic compressibility and volume compression in solvated proteins by molecular dynamics simulation at high pressure.
Constant pressure and temperature molecular dynamics techniques have been employed to investigate the changes in structure and volumes of two globular proteins, superoxide dismutase and lysozyme, under pressure. Compression (the relative changes in the proteins' volumes), computed with the Voronoi technique, is closely related with the so-called protein intr
-
6. Effect of carbopol and polyvinylpyrrolidone on the mechanical, rheological, and release properties of bioadhesive polyethylene glycol gels
This study examined the mechanical (hardness, compressibility, adhesiveness, and cohesiveness) and rheological (zero-rate viscosity and thixotropy) properties of polyethylene glycol (PEG) gels that contain different ratios of Carbopol 934P (CP) and polyvinylpyrrolidone K90 (PVP). Mechanical properties were examined using a texture analyzer (TA-XT2), and rheo
Springer-Verlag.