DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yeo, DY | ko |
dc.contributor.author | No, Hee-Cheon | ko |
dc.date.accessioned | 2019-09-03T05:20:07Z | - |
dc.date.available | 2019-09-03T05:20:07Z | - |
dc.date.created | 2019-09-02 | - |
dc.date.created | 2019-09-02 | - |
dc.date.issued | 2019-10 | - |
dc.identifier.citation | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.141, pp.554 - 568 | - |
dc.identifier.issn | 0017-9310 | - |
dc.identifier.uri | http://hdl.handle.net/10203/266604 | - |
dc.description.abstract | In this paper, two-phase drag models for a packed bed of uniform-size particles were suggested, and they were applied to the calculation of pressure drop and dryout heat flux. We provided physical basis for the two-phase flow regime model through the analysis of the interfacial friction (F-i). The suggested model provides flow patterns representing bubbly, slug, and channel flow and considering three criteria including d(2)F(i)/d alpha(2) = 0, F-i = maximum, and F-i = 0. The results obtained from the three criteria were drawn with several observation-based experimental ones to generate the flow regime map (void fraction vs. particle diameter). Through the current flow regime map, we clearly saw the existence of channel flow in a packed bed with particles smaller than around 3.5 mm. Then, mechanistic interfacial friction models were developed on basis of the current two-phase flow map of bubbly flow, slug flow, channel flow and annular flow. The suggested interfacial friction models were validated with top- and bottom-flooding air-water experiments and boiling experiments. We found out that the capability of pressure drop estimation by the current model were significantly improved for a bed with small particles. Finally, a zero-dimensional dryout heat flux (DHF) model was derived using the suggested interfacial friction models, and validated against DHF experimental data for beds with 1-D configuration. The rootmean-square error (RMSE) of the suggested DHF model was 35%, which was the smallest among the RMSEs of the previous DHF models. (C) 2019 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | A zero-dimensional dryout heat flux model based on mechanistic interfacial friction models for two-phase flow regimes with channel flow in a packed bed | - |
dc.type | Article | - |
dc.identifier.wosid | 000480665000047 | - |
dc.identifier.scopusid | 2-s2.0-85068386957 | - |
dc.type.rims | ART | - |
dc.citation.volume | 141 | - |
dc.citation.beginningpage | 554 | - |
dc.citation.endingpage | 568 | - |
dc.citation.publicationname | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | - |
dc.identifier.doi | 10.1016/j.ijheatmasstransfer.2019.06.096 | - |
dc.contributor.localauthor | No, Hee-Cheon | - |
dc.contributor.nonIdAuthor | Yeo, DY | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Porous media | - |
dc.subject.keywordAuthor | Two-phase flow | - |
dc.subject.keywordAuthor | Interfacial friction | - |
dc.subject.keywordAuthor | Dryout heat flux | - |
dc.subject.keywordAuthor | Channel flow | - |
dc.subject.keywordPlus | PRESSURE-DROP | - |
dc.subject.keywordPlus | DEBRIS BED | - |
dc.subject.keywordPlus | DRAG | - |
dc.subject.keywordPlus | COOLABILITY | - |
dc.subject.keywordPlus | CORE | - |
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