Erosion/deposition and retention on graphite tiles exposed in EAST

Wu, Jing; Wampler, W.R.; Xie, Changwei; Ding, Fang; Wang, W.J.; Luo, Guang-Nan

doi:10.1016/j.jnucmat.2013.01.182

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…Measurements are made by a probe attached to a moving axis of this machine. Recently, CMMs have been used in many erosion studies. − To the authors’ best knowledge, their application in studying scales in stirred vessels has not been explored. Before the main runs, the surface profile of one of the plain reactor wall segments was documented using a Sheffield Discovery II CMM with a measurement accuracy of ±1 μm and a system accuracy of ±6 μm.…”

Section: Methodsmentioning

confidence: 99%

A Novel Approach To Quantify Scale Thickness and Distribution in Stirred Vessels

Davoody

Graham

et al. 2017

Ind. Eng. Chem. Res.

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A novel approach is proposed for the numerical evaluation of scale thickness and its distribution in a mixing tank. Whereas a majority of the available literature on scale buildup focuses on the application of chemical antiscalants, few works have been devoted to the prevention of scale formation through the proper design and operation of stirred vessels. The methodology proposed in the current study consists of two major phases: (1) identifying an accelerated process to grow scales on the walls of a laboratory reactor and (2) analyzing the grown scale physically. These objectives were achieved through the fabrication of a reactor that could be disassembled and the scanning of the reactor's surface using a coordinate measuring machine (CMM). The proposed approach was used to study the effects of liquid flow velocity and experiment duration on the patterns of scale formed both qualitatively and quantitatively.

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Section: Methodsmentioning

confidence: 99%

A Novel Approach To Quantify Scale Thickness and Distribution in Stirred Vessels

Davoody

Graham

et al. 2017

Ind. Eng. Chem. Res.

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Scale formation on the wall of a mechanically stirred vessel—experimental assessment and interpretation using computational fluid dynamics

et al. 2018

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Accelerated growth of scale was studied in a baffled agitated reactor, which could be disassembled into nine sections, allowing quantitative determination of scale thickness. A coordinate measuring machine was used to determine the scale thickness on individual wall segments. The growth pattern of the scale was found to be nonuniform due to the variation of fluid velocity near the wall at various heights. Computational fluid dynamics (CFD) simulation showed that fluid flow is time‐dependent and has two distinct flow zones, one involving recirculation through the impeller in the lower part of the vessel and the other involving lower velocities due to the flow separation at the wall in the upper part. CFD simulation also showed the presence of macroinstabilities, which manifest as asymmetrical and chaotic flow structures with relatively long‐time scales. Scale growth is found to be prominent in regions where the fluid velocity and wall shear stresses are low. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3912–3922, 2018

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Studies of material migration and deposition after the 2017 experimental campaign in EAST

Yan

Peng

et al. 2022

Nuclear Materials and Energy

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Erosion/deposition and retention on graphite tiles exposed in EAST

Cited by 3 publications

References 5 publications

A Novel Approach To Quantify Scale Thickness and Distribution in Stirred Vessels

A Novel Approach To Quantify Scale Thickness and Distribution in Stirred Vessels

Scale formation on the wall of a mechanically stirred vessel—experimental assessment and interpretation using computational fluid dynamics

Studies of material migration and deposition after the 2017 experimental campaign in EAST

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