A Waste Heat Exchanger Fly Ash Particle Deposition Model with Dynamic Mesh and Random Function Method
The fly ash particle deposition in the heat recovery process of the heat exchanger is an urgent issue that must be addressed. In this paper, the particle deposition model is improved using the dynamic mesh technology and random function method, we simulated and predicted the fouling morphology and particle size distribution of the fly ash layer using the deposition characteristics of particles of various sizes. The results indicated that when dynamic mesh technology is adopted, the tube wall’s boundary will be deformed geometrically with the deposition of particles, allowing the changes in the fouling morphology to be expressed more effectively. Under this study conditions, the particle deposition mass on the windward and leeward sides of the tube increased initially and then decreased with the particle size increased. With the increase of the flow velocity, the particle deposition mass shows a decreasing trend. Under mixed particle size, the first layer of particles accelerates the deposition of subsequent particles, and the first layer of particles usually consists of small particles
Year of publication: |
[2022]
|
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Authors: | han, zhimin ; Yang, Xinrui ; Li, Jinhui ; Xu, Zhiming |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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