Application of Computational Fluid Dynamics (CFD) Simulations to Spray-Freezing Operations

被引：21

作者：

Anandharamakrishnan, C. ^{[1
,2
]}

Gimbun, J. ^{[1
,2
]}

Stapley, A. G. F. ^{[1
,2
]}

Rielly, C. D. ^{[1
,2
]}

机构：

[1] Department of Chem Engineering, Loughborough, Leics, England

[2] Univ Loughborough, Dept Chem Engn, Loughborough LE11 3TU, Leics, England

来源：

DRYING TECHNOLOGY | 2010年 / 28卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Impact position; Recalescence; Residence time; Solidification; TEMPERATURE;

D O I：

10.1080/07373930903430843

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A 3D computational fluid dynamics (CFD) simulation for spray-freezing in a cold gas has been developed and used to identify design improvements. This model includes an approximate method to model the latent heat of fusion and is able to track particle trajectories. The simulation predictions agreed reasonably well with experimentally measured gas temperatures and droplet velocities. The results suggest that a hollow-cone spray is more effective in cooling the particles uniformly. The CFD simulation suggested that buildup of an icy layer on the cone walls observed experimentally was due to incomplete freezing of larger particles (100 mu m). Collection efficiencies could be raised (from 20 to 57%) by increasing the diameter of the chamber outlet.

引用

页码：94 / 102

页数：9

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