Доступ предоставлен для: Guest
Interfacial Phenomena and Heat Transfer

Выходит 4 номеров в год

ISSN Печать: 2169-2785

ISSN Онлайн: 2167-857X

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.5 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00018 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.11 SJR: 0.286 SNIP: 1.032 CiteScore™:: 1.6 H-Index: 10

Indexed in

OBSERVATION OF A FALLING DROPLET WITH PH INDICATOR

Том 1, Выпуск 3, 2013, pp. 289-299
DOI: 10.1615/InterfacPhenomHeatTransfer.2013010211
Get accessGet access

Краткое описание

The evolution of a chemical reaction on a droplet was studied by letting a drop containing the pH indicator bromothymol blue fall into alkaline liquid and, for comparison, into distilled water. For obtaining data with high spatial and temporal resolution, an ultra-high-speed camera is used. Chemical and physical properties of the evolving processes are dominated by different mechanisms in an initial phase up to 3 ms and in a later phase (3−50 ms). We find deformation of the droplet together with the chemical reaction starting along the equatorial line of the droplet. No reaction takes place at the advancing edge, where the drop impacts on the surface of the solution. Small vertical fingers emerge from the front equatorial line within 1.5 ms. Neither cuvette size nor initial height of the droplet affect these phenomena. It appears that a local chemical reaction due to the deformation of the droplet and heat diffusion play major roles during this early reactive stage. On the other hand, we find that many aspects of drop dynamics in the later phase, except flare formation, resemble those observed in previous studies, such as cavity formation and hydrodynamic fluxes influencing the drop itself, as well as the liquid surrounding it. Here, the presence of the pH indicator helps to detect dependencies on cuvette size, as well as on initial height of the droplet. The occurrence of flares may be due to the formation of a thin layer of reacted bromothymol blue the inner surface of the cavity.

ЦИТИРОВАНО В
  1. Müller Stefan C., Observation of Chemical Reactions Induced by Impact of a Droplet, in The Micro-World Observed by Ultra High-Speed Cameras, 2018. Crossref

  2. Mosheva E A, Shmyrov A V, Effect of the universal acid-base indicator on the formation of the concentration-dependent diffusion instability, IOP Conference Series: Materials Science and Engineering, 208, 2017. Crossref

Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции Цены и условия подписки Begell House Контакты Language English 中文 Русский Português German French Spain