Heat Transfer Experiments in a Rotary Drum for a Variety of Granular Materials

Nafsun, Aainaa Izyan; Herz, Fabian; Specht, Eckehard; Scherer, Viktor; Wirtz, S.

doi:10.1080/08916152.2015.1036180

Cited by 27 publications

(8 citation statements)

References 19 publications

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“…Previous studies on the heat transfer in a rotary kiln have been done [10][11][12][13][14][15][16], for example, Hanifarianty et al, [16] studied the heat transfer of rotary drum by using Computational Fluid Dynamics (CFD). However, they did not relate the effect of reaction kinetics on the heat transfer during the fermentation process.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Model in a Rotary Drum During the Fermentation Process

Jamil

Nafsun

Kasim

2020

ARFMTS

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A new mathematical model describing heat transfer during the fermentation process in a rotary drum is proposed. The model includes representations of the kinetic reactions, the temperature of the solid bed, and physical structures within the rotary drum. The model is developed using five ordinary differential equations and was then solved using the Runge-Kutta method embedded in MATLAB software. A reasonable behaviour for the temperature profile to the fermentation process is achieved. The results show that the mass of the solid bed, contact heat transfer coefficient, and the wall temperature has a significant effect on the fermentation process in a rotary drum.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Model in a Rotary Drum During the Fermentation Process

Jamil

Nafsun

Kasim

2020

ARFMTS

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“…Under actual working conditions, granule motion and mixing are achieved by drum rotation. Furthermore, many applications also involve heat transfer, whereby particles come into contact with the heated inner wall of the drum , . The effects of mixing and heat transfer play a vital role in product quality, productivity, and energy saving.…”

Section: Introductionmentioning

confidence: 99%

Mixing and Heat Transfer of Granular Materials in an Externally Heated Rotary Kiln

et al. 2019

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A heat transfer model based on the discrete element software EDEM and the secondary development tool C++ is developed to simulate the mixing and heat transfer process of particles under different parameters. This model is validated by comparison with experimental data and proved reasonable. It aims to study the heat transfer law of flowing particles in an externally heated rotary kiln and reveal the correlation between mixing and heat transfer from the mechanism. The results show that the combination of the total contact area between adherent particles and the drum wall, the mean temperature difference between adherent particles and the drum wall, the total contact area between particles, and the mean temperature difference between particles affect the heat transfer process. Changes in the temperature differences caused by the mixing rate dominate the heat transfer at different speeds or filling rates.

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“…Several experimental, numerical, and theoretical have been done to study the heat transfer in granular materials in rotating drums [1][2][3][4][5][6][7][8][10][11][12][13][14]. Based on experiments in rotating calciners and theoretical work based on penetration theory [2,4,14], it was shown that the heat transfer coefficient of the bulk granular material can be predicted from the fill level, speed of rotation, and the bulk thermal properties of the granular materials and powders.…”

Section: Introductionmentioning

confidence: 99%

“…Based on experiments in rotating calciners and theoretical work based on penetration theory [2,4,14], it was shown that the heat transfer coefficient of the bulk granular material can be predicted from the fill level, speed of rotation, and the bulk thermal properties of the granular materials and powders. However, there are some difference among the models that were developed in these studies [11]. The heat transfer in granular flows is a complex processes and several factors may have contributed to the variation in these models.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the temperature distribution of granular material in a horizontal rotating cylinder

et al. 2017

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Accurate prediction of the particles' temperature distribution and the time required to heat up the particles is important to maintain good quality products and economical processes for several industrial processes that involve thermal treatment. However, we do not have quantitative models to predict the average temperature or particles' temperature distribution accurately. In this article, we carry out DEM simulations and compute the temporal and spatial evolution of the distribution of the particles' temperature in rotating cylinders. We present typical examples for different particle properties and operating conditions. The temperature distribution follows what is referred to as a uniform distribution with well defined mean and standard deviation values. Our analysis of these statistical parameters can assist in the prediction of the time required to heat up granular materials and the design of efficient processes.

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Heat Transfer Experiments in a Rotary Drum for a Variety of Granular Materials

Cited by 27 publications

References 19 publications

Heat Transfer Model in a Rotary Drum During the Fermentation Process

Heat Transfer Model in a Rotary Drum During the Fermentation Process

Mixing and Heat Transfer of Granular Materials in an Externally Heated Rotary Kiln

Evolution of the temperature distribution of granular material in a horizontal rotating cylinder

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