Nanoparticles have proven to be effective in sensible and latent heat exchanges alike. Applications of nanoparticles phase change processes are associated with migration resuspension upon which our existing knowledge is very limited. This work experimentally investigates the ratio, stability during change. Knowledge on ratio essential gauge thermal lubricative enhancements subsequent processes....

The paper presents CFD code validation and benchmarking against the NUPEC BFBT (BWR FullSize Fine-Mesh Bundle Tests) data, performed within the OECD/NRC BFBT void distribution benchmark and as part of the NURESIM (European Platform for Nuclear Reactor Simulations) Integrated Project. Sub-cooled flow boiling occurs in many industrial applications and is characterized by large heat transfer coeff...

The accurate prediction of the so-called Departure from Nucleate Boiling is a crucial point in the safety analysis of nuclear reactor cores. Nowadays, the DNB evaluation is based on experimental correlations using numerical results of averaged two-phase flow models. A natural goal is therefore to replace this rough procedure by a direct numerical simulation of the boiling crisis. The physical m...

This work introduces the use of machine vision in the massive bubble recognition process, which supports the validation of boiling models involving bubble dynamics, as well as nucleation frequency, active site density and size of the bubbles. The two algorithms presented are meant to be run employing quite standard images of the bubbling process, recorded in general-purpose boiling facilities. ...

This study uses high-speed imaging to investigate the dynamic collision behavior of a single hydrous ethanol droplet in different water/ethanol ratios on heated horizontal glass surface. The initial diameter varied from 3.3 4.1 mm, and impact velocity was 0.57 m/s. covers range surface temperatures (373 K 553 K) mass fractions (0% 100%) reveal four regimes droplet-impinging behaviors, including...

New energy vehicles have better clean and environmental protection characteristics than traditional fuel vehicles. The new engine cooling technology is critical in the design of This paper used one-and three-way joint simulation methods to simulate refrigeration system Firstly, a k-ε turbulent flow model for pump field established based on principle computational fluid dynamics. Then, CFD comme...

A brief review of recent low gravity boiling research by investigators based in the United States is performed. Topics covered include bubble dynamics, nucleate pool boiling and CHF, transition boiling, boiling of mixtures, electric ˆeld eŠects, acoustic ˆeld eŠects, and ‰ow boiling. Planned research activities and recommendations for future