Cálculo de pontos críticos e tricríticos de misturas termodinâmicas via otimização global utilizando métodos estocásticos e determinísticos

• Autor(a) principal: Rodrigues Júnior, Raimundo Augusto Rego
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/13697
• topic: Critical and tricritical points; Global optimization; Nonlinear system; Pontos críticos e tricríticos; Otimização global; Sistema não linear; Teoria do ponto crítico (Análise matemática); Análise global (Matemática); Otimização matemática Métodos de simulação; Termodinâmica; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA

The calculation of critical and tricritical points of thermodynamic mixtures can be formulated in various ways, this work were used the formulation via global optimization to generate graphs of functions, choice of initial estimitivas the TGO for critical points and resolution tricríticos points by PSOFC and via non-linear system to solve problems using the initial estimates by DFSANE. To avoid excessive computational cost with numerical routines was used approaches in the form of finite difference of the terms that make up the objective function. To simulate the P−v−T relationship opted for the cubic equation of state of Peng-Robinson and the classic rule of van der Vaals fluids. For problem modeling also we calculated the order tensioners 2, 3, 4 e 5 of the stability test function. The results were compared with results obtained by other authors that have used numerical methods, state equation or different approaches from those used in this work and we obtained superior results and others never obtained.