Heat and Mass Transfer in Porous Materials with Complex Geometry: Fundamentals and Applications

Lima, Antônio Gilson Barbosa de; Neto, Severino Rodrigues de Farias; Silva, W. P.

doi:10.1007/978-3-642-21966-5_7

Cited by 17 publications

(16 citation statements)

References 29 publications

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“…This expression is known as Darcy friction factor (de Lima et al, 2012). Head loss for fully developed flow is determined by co-relation…”

Section: Friction Factor and Basic Equationsmentioning

confidence: 99%

Numerical analysis of friction factor for a fully developed turbulent flow using k–ε turbulence model with enhanced wall treatment

Ahsan

2014

Beni-Suef University Journal of Basic and Applied Sciences

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Enhanced wall treatment keε turbulence model Computational fluid dynamics (CFD) Friction factor a b s t r a c t The aim of this study is to formulate a computational fluid dynamics (CFD) model that can illustrate the fully turbulent flow in a pipe at higher Reynolds number. The flow of fluids in a pipe network is an important and widely studied problem in any engineering industry. It is always significant to see the development of a fluid flow and pressure drop in a pipe at higher Reynolds number. A finite volume method (FVM) solver with keε turbulence model and enhanced wall treatment is used first time to investigate the flow of water at different velocities with higher Reynolds number in a 3D pipe. Numerical results have been presented to illustrate the effects of Reynolds number on turbulence intensity, average shear stress and friction factor. Friction factor is used to investigate the pressure drop along the length of the pipe. The contours of wall function are also presented to investigate the effect of enhanced wall treatment on a fluid flow. A maximum Reynolds number is also found for which the selected pipe length is sufficient to find a full developed turbulent flow at outlet. The results of CFD modeling are validated by comparing them with available data in literature. The model results have been shown good agreement with experimental and corelation data.

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“…This expression is known as Darcy friction factor (de Lima et al, 2012). Head loss for fully developed flow is determined by co-relation…”

Section: Friction Factor and Basic Equationsmentioning

confidence: 99%

Numerical analysis of friction factor for a fully developed turbulent flow using k–ε turbulence model with enhanced wall treatment

Ahsan

2014

Beni-Suef University Journal of Basic and Applied Sciences

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“…This fiber is extracted from the plant, from the remains of the bunches, and from the bananas themselves. The remains of bananas and bunches have also been used in animal feed [1,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Heat and Mass Transfer, and Volume Variations in Banana Slices during Convective Hot Air Drying: An Experimental Analysis

et al. 2020

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Bananas are some of the most consumed fruits throughout the world, providing metabolizable calories and vitamins for humans, along with many other benefits. However, this fruit tends to be easily degraded by microorganisms and other chemical agents because of the high moisture content. Considering the importance, this work focuses on an experimental study regarding banana fruit drying. For such purpose, whole bananas were hand-peeled and sliced longitudinally and then dried by a hot air circulation oven with air temperatures of 40 °C, 50 °C, 60 °C and 70 °C. Measurements of mass, temperature, and dimensions of the sample were done during the drying process. Results of drying, heating, and shrinkage (volume and surface area) kinetics are presented and analyzed. The study revealed that the drying air temperature significantly affected moisture removal, heating, and dimensions’ variation rates, as well as quality of banana fruit. The drying carried out with higher temperature and lower relative humidity of the air gave rise to higher rates of drying, heating and variation of dimensions, and shorter drying time of the product.

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“…Porous bodies are classified as hygroscopic and non-hygroscopic (hydrophobic) depending on the states of the water entrapped within the structure. [33] Water can exist within a fabric as water vapour, bound water, or unbound (free) water. [34] The ratio of the types of water is defined by the type of the fibre (hygroscopic -non-hygroscopic), as well as yarn and fabric construction that defines porosity and pore dimensions.…”

Section: Introductionmentioning

confidence: 99%

Analysis and modeling of drying behavior of knitted textile materials

2016

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Drying properties of textiles in summer and/or after any kind of physical activity resulted in sweating is of great importance for garments with high clothing comfort. This study analyses the drying behaviour of knitted fabrics produced from various fibres at different ambient air conditions. Drying kinetics and modelling of fabrics dried in standard environmental conditions were investigated in the first part. Polyester and lyocell fabrics were found to be the fasted dried samples. A two-stage modelling that is a combination of linear approach and thin-layer equations were used, and the best fitted equation was found to be the logarithmic one. The two-stage model was also proved to predict the drying rate. The second part included the effects of ambient humidity on drying times and rates. Drying time of polyester and polyester blended fabrics was affected by the increase in the humidity to a great extent. Furthermore a quadratic function was found to be highly correlated with the computed data so it was proposed to define the drying behaviour by ambient air humidity and drying time.

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Heat and Mass Transfer in Porous Materials with Complex Geometry: Fundamentals and Applications

Cited by 17 publications

References 29 publications

Numerical analysis of friction factor for a fully developed turbulent flow using k–ε turbulence model with enhanced wall treatment

Numerical analysis of friction factor for a fully developed turbulent flow using k–ε turbulence model with enhanced wall treatment

Heat and Mass Transfer, and Volume Variations in Banana Slices during Convective Hot Air Drying: An Experimental Analysis

Analysis and modeling of drying behavior of knitted textile materials

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