Generation of a surrogate compartment model for counter-current spray dryer. Fluxes and momentum modeling

Hernández, Borja; Pinto, Mark A.; Martı́n, Mariano

doi:10.1016/j.compchemeng.2022.107664

Cited by 8 publications

(2 citation statements)

References 71 publications

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“…The Prandtl number is a dimensionless number comparing the thickness of the speed limit layer and the thickness of the thermal limit layer. Can be stated as follows [19]:…”

Section: Prandtl Numbermentioning

confidence: 99%

The Simulation of Fluid Flow with a Vortex Generator 35° toward the Y-axis to Heat Transfer in Spray Dryer

Setyadi

Anggrainy

Yoga

et al. 2022

J. Phys.: Conf. Ser.

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The Spray Dryer is a spray drying machine to change liquid into dry powder. The spray drying machine can be defined by the drying process in a cylinder, utilizing air heated in the heater and flowing through a blower connected to a vortex generator with an angle of 35° to the Y-axis. The vortex generator causes the formation of turbulence of airflow. Heat transfer occurs between the hot air flow and the milk droplets so that the liquid milk becomes a dry powder. This research aims to see the vortex phenomenon, namely the turbulence intensity, airflow velocity, heat flux, and temperature distribution in a cylinder, compared with an experiment that used four conditions of temperature inlet. There is 80°C, 90°C, 100°C and 110°C. The liquid used in this research is dairy cow’s milk mixed with water and maltodextrin, which has a density value of 1056 kg/m3 and a specific heat value of 3930 J/kg K. The machine’s cylinder has a diameter of 0.5 m with a wall thickness of 1 x 10−3 m and a height of 2 m with a capacity of 1.27 l/hour with a drying time of 80 minutes. The speed airflow of this machine into the cylinder has 16 m/s with a cross-sectional diameter of 9,5 x 10−2 m and a thickness of 1 x 10−3 m which has a debit of 0.11 m3/s. In addition, the injector used has a diameter of 2 x 10−4 m and a speed of 13,54 m/s with a flow rate of 4,5 x 10−4 kg/s with a spray angle of 45° u. Besides that, the analysis results show that the airflow turbulence area is in the form of a vortex so that the drying process of heat transfer that occurs between the product material and the airflow becomes faster.

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“…The Prandtl number is a dimensionless number comparing the thickness of the speed limit layer and the thickness of the thermal limit layer. Can be stated as follows [19]:…”

Section: Prandtl Numbermentioning

confidence: 99%

The Simulation of Fluid Flow with a Vortex Generator 35° toward the Y-axis to Heat Transfer in Spray Dryer

Setyadi

Anggrainy

Yoga

et al. 2022

J. Phys.: Conf. Ser.

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“…One approach for efficiently calculating the mass transfer and reaction in complex systems is using CFD or DEM-based compartment models. This method has increased in popularity in recent years, and it consists of the extraction of mass and energy fluxes between several zones defined by target property in the CFD − or DEM model. , Once the network of reactors and their flows is defined, the heat and mass transfer models are formulated into each reactor for completing the mass and energy balances. This approach has been widely employed in different applications but not in the case of rotary dryers.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Method-Based Hybrid Compartment Model of a Rotary Dryer for Fertilizer Production

Prieto-García,

Hernández,

Sanz

et al. 2024

Ind. Eng. Chem. Res.

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This work introduces a compartment model based on a discrete element method (DEM) model. The DEM model determines the residence times (RTs) of particles in the active (in contact with air) and passive zones. The extracted RT is combined with the heat and mass transfer models into a compartment model, where particles are modeled by employing a population balance. Heat and mass transfer models contain efficiency coefficients that are modeled with surrogates generated from a reduced set of experiments. The resulting surrogate models are validated with additional experiments in an industrial facility. It accurately reproduces the heat and mass transfer in the dryer (±10% of relative error in temperature prediction) and provides a guess of the distribution of the properties of the particles (e.g., moisture content and temperature) across particle sizes and locations within the dryer.

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The Use of Global Sensitivity Analysis to Assess the Oral Absorption of Weakly Basic Compounds: A Case Example of Dipyridamole

Kesharwani,

Louit,

Ibrahim

2024

Pharm Res

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Generation of a surrogate compartment model for counter-current spray dryer. Fluxes and momentum modeling

Cited by 8 publications

References 71 publications

The Simulation of Fluid Flow with a Vortex Generator 35° toward the Y-axis to Heat Transfer in Spray Dryer

The Simulation of Fluid Flow with a Vortex Generator 35° toward the Y-axis to Heat Transfer in Spray Dryer

Discrete Element Method-Based Hybrid Compartment Model of a Rotary Dryer for Fertilizer Production

The Use of Global Sensitivity Analysis to Assess the Oral Absorption of Weakly Basic Compounds: A Case Example of Dipyridamole

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