Effects of the starch indicator on the buoyantly unstable iodate-arsenous acid reaction front

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F17%3A00477744" target="_blank" >RIV/67985874:_____/17:00477744 - isvavai.cz</a>

Alternative codes found

RIV/67985858:_____/17:00477744

Result on the web

<a href="http://dx.doi.org/10.1002/slct.201701276" target="_blank" >http://dx.doi.org/10.1002/slct.201701276</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/slct.201701276" target="_blank" >10.1002/slct.201701276</a>

Result language

angličtina

Original language name

Effects of the starch indicator on the buoyantly unstable iodate-arsenous acid reaction front

Original language description

Buoyantly unstable chemical fronts, which propagated in the iodate arsenous acid reaction system, were studied experimentally in 3D space and numerically in vertical 2D space. The fronts invaded the reaction solution from the left top corner in horizontal and vertical directions. Before the starch effects were examined condition under which friction did not influence the front propagation were found both experimentally and numerically. The critical solution depth and the critical distance between lateral walls, above which the front speed is not influenced by friction, were determined. Moreover, the results also show that the 2D simulations correspond to a vertically oriented plane placed the 3D experiments in 1/2 of the walls distance and along the x axis of the reactor. Importantly, those results also show that friction caused by the presence of solid side walls exclude pseudo 2D experiments to be compared with 2D simulations, when flow is involved. The effects of starch on the IAA fronts were studied experimentally at conditions, at which the friction did not influence the front propagation. Although the starch is used in very low concentrations as an iodine indicator, the experimental results show that starch presence strongly affects the dynamics of the liquid IAA reaction system. The presence of starch decreases the front velocity independently on the direction of the front propagation. Starch also affects the pattern formation. A possible mechanism is discussed.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GAP105%2F10%2F0919" target="_blank" >GAP105/10/0919: Chemically induced hydrodynamic instabilities in a liquid layer with a free gas-liquid interface</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ChemistrySelect

ISSN

2365-6549

e-ISSN

—

Volume of the periodical

2

Issue of the periodical within the volume

24

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

7141-7149

UT code for WoS article

000408644100031

EID of the result in the Scopus database

2-s2.0-85041800877