Freezing time of an infinite cylinder and sphere using the method of lines

• Autor(a) principal: Souza, Domingos Fabiano de Santana
• Data de Publicação: 2016
• Outros Autores: Ferreira, Sebastião Ribeiro, Rojas, Leopoldo Oswaldo Alcázar, Oliveira, Jackson Araújo de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• DOI: 10.1016/j.ijrefrig.2016.01.021.
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/45195
• topic: Freezing model; Freezing time; Method of lines; Numerical method

An energy balance model has been developed to simulate freezing processes for infinite cylinders and spheres. The mathematical model (1) was numerically solved using the method of lines. In this method, spatial derivatives are discretized by the finite difference method and the resulting system of ordinary differential equations in time is integrated using an appropriate solver. Freezing times obtained with the proposed model were compared to experimental data and results calculated by different published methods. The freezing times predicted by the proposed model agreed well with the published experimental results and predictions by other published methods. Model (1) gives a percentage error in the range −4.61 ≤ E (%) ≤ 6.81, which includes the experimental data for the 123 spheres analyzed and 30 infinite cylinders, within range −2.96 ≤ E (%) ≤ 3.34