A theory on the icing evolution of supercooled water near solid substrate. (December 2015)

• Record Type: Journal Article
• Authors: Kong, Weiliang; Liu, Hong
• Is Part Of: International journal of heat and mass transfer. Volume 91(2015:Dec.)
• Page Start: 1217
• Page End: 1236
• Publication Date: 2015-12
• Subjects: Icing evolution -- Icing forms -- Interface stability -- Multi-stage icing model -- Substrate effect; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2015.08.005
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: Transient icing of supercooled water on substrate consists of three stages. In supercooled water, thin ice film can spread on metal surface with a high speed. Stability criterion of solid–liquid interface in unsteady temperature field is given. Change of icing forms would greatly impact the icing rate. Abstract: The shape of ice–water interface has significant impact on the form and law of ice growth. However, knowledge about the form of icing in the supercooled water is insufficient. This paper investigates the unsteady ice growth on a planar solid substrate in supercooled water. An experiment is designed to trigger icing on a solid substrate and observe the whole icing process from two directions simultaneously. An evolution of ice growth that consists of three stages is observed. Based on the experimental results, a theory is presented to explain the mechanisms of ice growth and stage conversion of in the icing process. This theory includes the equations of ice growth velocity in three stages and the criterion of ice–water interface stability in an unsteady temperature field, which determines the icing form and rate. A multi-stage icing model is presented for icing prediction. The calculated results using this model could predict the conversion of icing forms and fits well with experimental results. Therefore, the change in the form of icing significantly impacts the ice accretion process on a solid substrate, such as aircraft or outdoor devices.