Application of computational fluid dynamic (CFD) simulations to spray-freezing operations

A 3-D 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 agree...

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Bibliographic Details
Main Authors: C. Anandharamakrishnan, Jolius Gimbun, Andy Stapley, Chris Rielly
Format: Default Article
Published: 2010
Subjects:
Chemical engineering not elsewhere classified
Recalescence
Solidification
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Chemical Engineering not elsewhere classified
Online Access:https://hdl.handle.net/2134/6071
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Summary:A 3-D 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 build up of an icy layer on the cone walls observed experimentally was due to incomplete freezing of larger particles (> 100 µm). Collection efficiencies could be raised (from 20% to 57%) by increasing the diameter of the chamber outlet.

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