在受限的化学花园中，低流速下形成阿基米德螺旋。

Archimedean Spirals Form at Low Flow Rates in Confined Chemical Gardens.

机构信息

Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, U.K.

Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, 18100 Armilla, Granada, Spain.

出版信息

Langmuir. 2022 May 31;38(21):6700-6710. doi: 10.1021/acs.langmuir.2c00633. Epub 2022 May 20.

DOI:10.1021/acs.langmuir.2c00633

PMID:35593590

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9161446/

Abstract

We describe and study the formation of confined chemical garden patterns. At low flow rates of injection of cobalt chloride solution into a Hele-Shaw cell filled with sodium silicate, the precipitate forms with a thin filament wrapping around an expanding "candy floss" structure. The result is the formation of an Archimedean spiral structure. We model the growth of the structure mathematically. We estimate the effective density of the precipitate and calculate the membrane permeability. We set the results within the context of recent experimental and modeling work on confined chemical garden filaments.

摘要

我们描述并研究了受限化学花园图案的形成。在将氯化钴溶液以较低的流速注入充满硅酸钠的赫勒肖（Hele-Shaw）单元时，沉淀物会形成带有细丝的薄丝，包裹在不断扩大的“棉花糖”结构周围。结果是形成阿基米德螺旋结构。我们对结构的生长进行了数学建模。我们估算了沉淀物的有效密度并计算了膜的渗透率。我们将结果置于最近关于受限化学花园细丝的实验和建模工作的背景下。