# Parametric Analysis of Cylinder Drying Process in Association with Various Materials
## 1 Introduction
They reported that a new method of the reaction engineering approach could not only avoid the effect of the shrinkage in the first place but also achieved a good prediction. [PERSON] et al. [17] proposed a dynamic model that described the behavior of the multi-cylinder drying process applied in paper production. Their computational model was developed based on the heat-and-mass balances around the cylinder, and they used the developed model to examine variations of cylinder surface temperatures. [PERSON] [18] hypothesized that the drying rate of the paper drying process can be enhanced by impinging the hot air on the drying paper through a fabric. To assess the idea, simulations and experiments were carried out, and they concluded that the dryer with the aforementioned impingement not only showed potential for increasing the drying rate but also improved the paper quality by preventing the shrinkage of the paper during the drying process. [PERSON] et al. [19] reviewed twenty simulation models of multi-cylinder paper drying. Their work focused on necessary coefficients for each of the reviewed models and how they are determined. [PERSON] and [PERSON] [20] proposed a mathematical model for examining the drying process of the web. In the computational model, three different zones, including a wet zone, an intermediate zone, and a dry zone, were determined. At the intermediate zone, the liquid and vapor moved in opposite directions similar to what happened in a heat pipe. [PERSON] and [PERSON] [21] reviewed papers on the drying process. They revealed that the main cost for yearly operating dryers is spent on steam production. Low dryer efficiency, less wet pressing, and non-uniformity of web moisture are attributed to reasons leading to higher drying costs. Steady-state modeling of multi-cylinder dryers in a corrugating paper machine was developed by [PERSON] et al. [22]. The reported dryer contained 35 cylinders, and the cylinders were divided into three groups for the calculation. They asserted that the developed model could be used to predict the evaporation rate and specific drying rate of the multi-cylinder dryers with high accuracy. The moisture distribution inside textile sheets and the effects of operating variables on the drying process were investigated by [PERSON] [23]. In their study, the crude cotton fabric was used as a drying material. They reported that the effect of air speed is more important during the constant drying rate period as compared to that of the decreasing rate period. [PERSON] et al. [24] experimentally reported a through-air drying process. They found that the internal structure of the material plays a very important role in through-air drying, and they suggested that the internal structure of the drying material should be carefully considered to optimize the drying process of a commercial dryer system. In the drying process, the hazards of the drying materials are also considered a problem. Moreover, the chemical structures and properties of the drying material should be clearly understood. [PERSON] [25] examined the structures and physical properties of cotton. He warned that overheating can cause the decomposition of cellulose. The morphology of wool was investigated by [PERSON] [26]. He reported that the external resistant membrane of wool is not only rich in lysine, but also contains important properties, such as the chemical inertness and hydrophobicity of the wool fibers. The molecular structure and mechanical properties of the Polyethylene terephthalate (PET) fibers were investigated by [PERSON] [27]. The author reported that the glass transition and the dynamic mechanical properties of the PET fibers were significantly affected by both crystallinity and orientation. Based on the reviewed literature, it is found that most of the existing studies in the drying process focus on paper drying, but information concerning the effects of various parameters of the cylinder drying process with different drying materials is still lacking.