A numerical model of the open-width coupling drying process for cotton fabrics based on the theory of heat and mass transfer in porous media

Wang, Shuangqing; Zhang, Huile; Chen, Huimin; Zhong, Yi; Yue, Xiaoli

doi:10.1177/0040517519891706

Cited by 6 publications

(17 citation statements)

References 18 publications

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“…In particular, because of the different structures of the plain-woven fabrics (No.1 fabric) and knitted fabrics (No.2 and No.3 fabrics), their porosity and permeability need to be derived in different ways. [28][29][30] Effective equivalent thermal conductivity and specific heat capacity 31 of the fabrics are obtained by equations proposed by Wang et al 17 The properties are shown in Table 2.…”

Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

“…The two kinds of structures of the fabrics are shown in Figure 2-1. The study in this paper is on the base of research of Shuangqing Wang et al [17] . The thermodynamic and structural parameters of the fabrics have been measured in previous work.…”

Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

“…The effect of yarn parameters on the properties of fabrics can be identified in several ways. 17,27 Data mining can help to discover the complex relationship between yarn parameter and fabric quality. 27 But in this section, the liquid-containing fabrics are equivalent to porous media, many of whose properties need to be characterized during the drying process.…”

Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

“…Based on the principle of conversation of mass, heat, pressure, and momentum, mathematic models were selected to quantitatively analyze the two-dimensional continuous fabrics drying process in the tenter. The study in this paper is based on Wang et al's research into the intermittent fabric drying process, 17 meaning that flow and transport models of the flow field in the tenter including mixture multiphase flow model, species transportation model and turbulence model, and fabrics heat-mass transfer models including energy conversation equation inside the fabric, surface heat transfer model and phase transformation model are all the same as the mathematical models in that paper. 17 In addition, a dynamic grid model and sliding grid model were selected to describe the continuous drying process with moving fabric.…”

Section: Mathematic Modelmentioning

confidence: 99%

“…In this paper, to solve the problems mentioned above, a finite element model for continuous fabric drying process is developed; in addition, a method for efficiently designing experimental schemes of fabric continuous drying is proposed, and the scientific optimization method to select the optimal process parameters according to multiple evaluation indicators is also proposed. Specifically, the next section presents the complete parameterized characterization system of various fabrics, and this system is built on the base of work done by Wang et al 17 Then, a finite element model is built to simulate continuous drying process of different fabrics under different process conditions. And the numerical model is verified by experiments.…”

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Process analysis and optimization of open-width fabric continuous drying based on numerical simulation

Wang

Zhang

Chen

et al. 2020

Textile Research Journal

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As an indispensable part of textile processing, the fabric drying process has a great impact on product quality and overall energy consumption. To reveal the characteristics of the continuous drying process of various fabrics and optimize process parameters for improving productivity and saving energy, a finite element model is built to simulate the continuous fabric drying process, and an optimization method is applied to optimize process parameters based on the model. Specifically, a finite element model is first built; the model can predict distribution of water content and surface temperature of three kinds of fabric in the continuous drying process under different process parameters. The model is then verified by experiments, and the experimental results agree well with the numerical results: The mean absolute errors of distribution of water content and surface temperature of fabrics are 4.22% and 2.15℃, respectively. The numerical results indicate that wind velocity, wind temperature, and fabric velocity have a significant influence on the drying rate and surface temperature of fabrics in the continuous drying process, which, however, are not affected obviously by initial water content. It is also found that under the same initial and technological conditions, the drying rate and surface temperature of fabrics in the continuous drying process are lower than those in the intermittent drying process. Second, the Taguchi method is applied to design continuous fabric drying schemes, considering the interaction effect of technological parameters on the drying process. The numerical model is then applied to simulate these schemes, and the TOPSIS method is applied to analyze and compare these numerical results. The optimal technological parameters are determined; the optimal parameters can help to save energy by about 27.8 % and enhance energy efficiency by about 16 % in the continuous drying process. It is worth noting that the interaction effect of fabric velocity and wind temperature on the continuous drying process is more significant than their independent effects.

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Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

Section: Fabrics Equivalent To Porous Mediamentioning

confidence: 99%

Section: Mathematic Modelmentioning

confidence: 99%

mentioning

confidence: 99%

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Process analysis and optimization of open-width fabric continuous drying based on numerical simulation

Wang

Zhang

Chen

et al. 2020

Textile Research Journal

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Two-dimensional mathematical model of heat and moisture transfer processes during the natural storage and drying of heterogeneous agricultural products

Shadmanov,

Nosirova,

Kamolova

2024

BIO Web Conf.

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Developed a two-dimensional mathematical model of simultaneous heat and moisture transfer processes during the natural storage and drying of heterogeneous agricultural products in open areas. The mathematical model includes time-space variability of temperature and humidity, internal heat and moisture release, heat and moisture exchange with the environment, and also solar radiation. Based on an implicit finitedifference scheme with the second order in time and space variables, we developed an effective numerical solution for solving the problem. For studying and predicting the processes of heat and moisture transfer, software was created and experiments were done on raw cotton, making it possible to identify temperature and humidity changes at arbitrary points on the highhumidity raw cotton. Keywords: mathematical model, moisture transfer, heat transfer, heterogeneous porous media, finite-difference scheme, cotton

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Temperature and density distribution in an industrial stenter frame based on three-dimensional numerical simulation

Ramić¹,

Dzaferovic

Kadric

et al. 2022

Textile Research Journal

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Drying of textiles in industrial facilities represents an energy-intensive process where a large number of measures for energy and production cost savings can be introduced. Typical measures include the introduction of energy management, waste-heat recovery, process optimization and so on. Drying is a complex process with coupled heat and mass transfer between the heated air and humid textile, where parameters such as the air flow rate, air velocity and its flow regime and textile velocity and water content represent significant influential factors. The distribution of air temperature and density inside the drying section of an industrial stenter frame is analyzed in detail using three-dimensional numerical simulation, where the textile is modeled as a porous medium to analyze moisture diffusion within the textile. Heated air is introduced into a chamber by inlet nozzles and removed by exit nozzles, the distribution of which is based on actual machine configuration. A humid textile is introduced into a section, where temperature and density distribution within the textile are calculated for selected time periods. During the simulation in the Fluent program, models of specific component transport, multiphase air flow, turbulent flow, porosity and evaporation were used. The results represent a valuable data set that provides an in-depth insight into the drying process in the industrial stenter machine.

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A numerical model of the open-width coupling drying process for cotton fabrics based on the theory of heat and mass transfer in porous media

Cited by 6 publications

References 18 publications

Process analysis and optimization of open-width fabric continuous drying based on numerical simulation

Process analysis and optimization of open-width fabric continuous drying based on numerical simulation

Two-dimensional mathematical model of heat and moisture transfer processes during the natural storage and drying of heterogeneous agricultural products

Temperature and density distribution in an industrial stenter frame based on three-dimensional numerical simulation

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