An experimental investigation of the melting process of an ice bead on the smooth and micro-grooved surfaces under a hot shear flow. (December 2019)

• Record Type: Journal Article
• Authors: Chen, Miaomiao; Yang, Zhigang; Jin, Zheyan
• Is Part Of: International journal of heat and mass transfer. Volume 144(2019)
• Publication Date: 2019-12
• Subjects: Melting -- Ice bead -- Micro-grooves -- Cold surface -- Hot shear flow; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2019.118630
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: The melting process of an ice bead under a hot shear flow on micro-grooved surfaces. The melting process of the ice bead could be divided into three categories. The micro-grooves affected wetting length and removable time. The micro-grooved surfaces were more favorable for the ice bead melting process. Abstract: In the present study, we experimentally investigated the melting process of an ice bead on the smooth and micro-grooved surfaces under a hot shear flow. One smooth silicon surface and three micro-grooved silicon surfaces were fabricated and tested. A parameter study of the substrate surface temperature and the air flow speed was conducted. During the experiment, an ice bead was first formed from a freezing water droplet on a cold substrate surface. Then, the ice bead was exposed to a hot shear flow and its melting process was recorded by a CCD camera and an infrared camera simultaneously. As for the micro-grooved surfaces, the direction of the hot shear flow was parallel to the micro-grooves. The results showed that the melting process of the ice bead on the smooth and micro-grooved surfaces under a hot shear flow could be divided into three categories. The air flow speed, the surface temperature, and the type of the surface had a significant influence on which category the melting process of the ice bead belonged to. Besides, the presence of the micro-grooves was found to apparently affect the wetting length, the removable time, and the temperature along the centerline of the ice bead. In general, the micro-grooved surfaces were found to be more favorable for the ice bead melting process than the smooth surface.