Mystery Well: Chemical-Engineering Solution to the Internal Rain Problem.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00478381" target="_blank" >RIV/67985858:_____/17:00478381 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ces.2017.09.025" target="_blank" >http://dx.doi.org/10.1016/j.ces.2017.09.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2017.09.025" target="_blank" >10.1016/j.ces.2017.09.025</a>

Result language

angličtina

Original language name

Mystery Well: Chemical-Engineering Solution to the Internal Rain Problem.

Original language description

The motivation of this study is to contribute to the problem from the chemical-engineering point of view, considering the Mystery Well to be a multiphase contacting/reacting/transporting system. The goal is to show that the anticipated convective circulatory motions can really develop. A simple model is suggested, based on the available data and elementary theoretical reasoning (evaporative convection, thermal instability, Rayleigh number, buoyant flows, dew point, multiphase effects). The instability condition for the Rayleigh-Benard convection is formulated. The estimated actual Rayleigh number Ra is by a few orders higher than the critical value, indicating the presence of convective motions. A simple mechanism for the rain formation is suggested, different for both year seasons. In summer, the evaporationndriven convection could develop in the lower isothermal and cold part of the well, where the vapour saturated light air ascends and penetrates into the thermally stably stratified upper zone. This up-flow is compensated by the down-flow of the warm humid air from the ambient that reaches the dew point and the vapour precipitates. In winter, the whole gas layer in the well is doubly unstably stratified, by both the thermal and humidity (bottom 100%, ambient about 80%) vertical profiles. The estimated Ra-values for the thermal and the humidity convections are above the critical. The model prediction is compared with the publishednexperimental data obtained in the summer season.

Czech name

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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

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OECD FORD branch

20402 - Chemical process engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

—

Volume of the periodical

174

Issue of the periodical within the volume

DEC 31

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

396-402

UT code for WoS article

000413321000035

EID of the result in the Scopus database

2-s2.0-85029790642