camera iphone 8 plus apk Avoiding Powder Lumps: Effect of Interfacial Properties and Liquid Flow

Xin Yi Ong (1), Spencer Taylor (2), Marco Ramaioli (1,*),
(1) Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK
(2) Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK

Reconstitution of the food by rehydration of the powder can lead to unsatisfactory product quality due to the formation of lumps, which is a common issue in industrial processes and in the household. This study aims at understanding the interplay between the properties of the powder grains (particle size, density and contact angle) and the characteristics of the liquid flow used to disperse them, in order to obtain a uniform dispersion and avoiding lump formation. The dispersion of insoluble and non-cohesive grains was investigated on both static and moving air-liquid interfaces.

Entrainment of liquid in the powder by “wicking” can lead to complete sinking of the grains. It was found that there exists a critical contact angle, below which powder islands do not form and grains sink. The effect of grain size on powder sinking, or on the depth of the powder island formed, was studied quantitatively to understand the impact of agglomeration on powder dispersion. Importantly, it was observed that introducing flow in the liquid by agitation does not necessarily improve the dispersion process as it can destabilise the whole powder island. Therefore, the detachment of the island from the interface is considered to be the precursor to powder lump formation.

camera iphone 8 plus apk Avoiding Powder Lumps: Effect of Interfacial Properties and Liquid Flow
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Science & Technology	Upload TimePublished on 30 Jun 2017

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