Water suspended on chilled superhydrophobic surfaces exhibits delayed freezing; however, the interdrop growth of frost through subcooled condensate forming on the surface seems unavoidable in humid environments. It is therefore of great practical importance to determine whether facile defrosting is possible on superhydrophobic surfaces. Here, we report that nanostructured superhydrophobic surfa...

Introduction: Uncommon features have been observed in the cryptic region near the south polar cap during the spring time retreat of the seasonal cap. The defrosting of the seasonal CO2 cap leads to dalmatian spots named dark spots [1], spiders [2], fans [3] and polygonal crack patterns [4]. (Kieffer, 2007) proposed a semiquantitative model to explain all these processes. The dark spots, fans an...

The hydrophobicity and anti-icing performance of the surfaces of some artificial hydrophobic coatings degraded after several icing and de-icing cycles. In this paper, the frost formation on the surfaces of butterfly wings from ten different species was observed, and the contact angles were measured after 0 to 6 frosting/defrosting cycles. The results show that no obvious changes in contact angl...

We report a case where a patient used microwave radiation to thaw his frozen insulin resulting in marked deterioration in his diabetic control. The consequences of this action were examined using high-performance liquid chromatography.

Considering the problems such as long duration of defrosting, low working reliability and high energy consumption refrigerated containers, this paper put forward a new defrosting method combining air electro-thermal energy, designed structure system based on structural features refrigeration modules containers. The two-variable wind pressure change temperature difference both sides evaporator w...

fridges are used in various industries, and heat exchanger is one of the main components of these systems; therefore, efficiency analysis of these systems is very important. in many fridges, frost over the heat exchanger tubes or pipes affects the system operation and reduces heat transfer between the refrigerant and ambient, so defrosting systems are usually used to enhance heat transfer. desi...

In this paper, a dynamic heat exchanger model that unifies the frosting and defrosting analyses is presented. A novel scheme is proposed to solve the air flow redistribution due to non-uniform frost blockage. Unlike the existing defrost models which separate analysis for tubes and fins, the proposed defrost model unifies the analysis to maintain model consistency. The first-principles based fro...

Despite extensive progress, current icephobic materials are limited by the breakdown of their icephobicity in the condensation frosting environment. In particular, the frost formation over the entire surface is inevitable as a result of undesired inter-droplet freezing wave propagation initiated by the sample edges. Moreover, the frost formation directly results in an increased frost adhesion, ...

In this letter we study the effect of freezing and defrosting on dielectric properties biological tissues. The electromagnetic characterization tissues at microwave frequencies is crucial for development microwave-based biomedical devices. These measurements are often not practical, as tissue degradation restricts time available between excision measurements. For reason, measurement that underw...