Luigi Sartor - Academia.edu (original) (raw)

Papers by Luigi Sartor

AIChE Journal, 2001

A no®el imbibition model of a coating fluid in a paper was de®eloped. The microstructure of the p... more A no®el imbibition model of a coating fluid in a paper was de®eloped. The microstructure of the paper was represented by a network of interconnected channels or throats formed between the paper's fibers. Geometrical characteristics of the channels, such as effecti®e radius and length, were selected from representati®e statistical distributions. The interconnecti®ity of the channels was characterized by an a®erage coordination number treated as a parameter of the model, and its effect on the imbibition pro-() cess was studied. The study dealt with a dynamic time-dependent boundary condition, in which a con®ection-dri®en pressure was applied to the coating fluid on the external surface of the paper or dri®en only by capillary forces. The flow parameters used in the model represent a high-speed coating process. Extensi®e computer simulations were carried out to study the effect on the imbibition process of three distinct sets of parameters: microstructural parameters of the paper; the fluid's properties; and the dynamic boundary condition. The mean coordination number and a®erage throat size of the paper's pore space, the coating fluid's ®iscosity, and the dynamic boundary condition all strongly influenced imbibition of the coating fluid.

AIChE Journal, 2001

A no®el imbibition model of a coating fluid in a paper was de®eloped. The microstructure of the p... more A no®el imbibition model of a coating fluid in a paper was de®eloped. The microstructure of the paper was represented by a network of interconnected channels or throats formed between the paper's fibers. Geometrical characteristics of the channels, such as effecti®e radius and length, were selected from representati®e statistical distributions. The interconnecti®ity of the channels was characterized by an a®erage coordination number treated as a parameter of the model, and its effect on the imbibition pro-() cess was studied. The study dealt with a dynamic time-dependent boundary condition, in which a con®ection-dri®en pressure was applied to the coating fluid on the external surface of the paper or dri®en only by capillary forces. The flow parameters used in the model represent a high-speed coating process. Extensi®e computer simulations were carried out to study the effect on the imbibition process of three distinct sets of parameters: microstructural parameters of the paper; the fluid's properties; and the dynamic boundary condition. The mean coordination number and a®erage throat size of the paper's pore space, the coating fluid's ®iscosity, and the dynamic boundary condition all strongly influenced imbibition of the coating fluid.