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Direct numerical simulation of chemical reaction fouling in a turbulent channel flow
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 최해천 | - |
dc.contributor.author | 김한별 | - |
dc.date.accessioned | 2017-07-14T03:44:15Z | - |
dc.date.available | 2017-07-14T03:44:15Z | - |
dc.date.issued | 2017-02 | - |
dc.identifier.other | 000000141059 | - |
dc.identifier.uri | https://hdl.handle.net/10371/123932 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2017. 2 . 최해천. | - |
dc.description.abstract | In heat exchanger industries, the fouling deposition on solid surfaces causes serious problems such as impaired heat transfer and increased pressure drop. Thus, the prediction and mitigation of fouling deposits has been an important issue. In the present study, we conduct direct numerical simulation of a fully developed channel flow. We assume that fluid flows as a slurry flow and the apparent viscosity is calculated using Thomas equation. We also assume that a second order reaction with single soluble reactant occurs and a highly viscous product is accumulated at high-temperature wall. Two passive scalar equations are solved along with the Navier-Stokes equations to obtain the mass fraction of the reactant and the temperature in the channel. The reactant flows into the channel at the inlet, and the highly viscous product is stuck on the wall and forms a fouling layer. | - |
dc.description.tableofcontents | 1 Introduction 1
2 Numerical methodology 4 2.1 Problem description 4 2.2 Governing equations 4 2.3 Computational details 6 3 Results and discussion 11 3.1 Mean streamwise velocity and mean temperature of the fouled channel 11 3.2 Growth of the fouling boundary along with the high viscosity at the wall 12 3.3 Changes of the fouling boundary due to near wall vortical structures 13 3.4 Time traces of fouling resistance and the boundary of fouling 13 4 Summary and Conclusion 26 Bibliography 27 | - |
dc.format | application/pdf | - |
dc.format.extent | 2116173 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | CFD | - |
dc.subject | numerical modeling | - |
dc.subject | chemical reaction fouling | - |
dc.subject | asphaltene | - |
dc.subject | channel flow | - |
dc.subject.ddc | 621 | - |
dc.title | Direct numerical simulation of chemical reaction fouling in a turbulent channel flow | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.citation.pages | v, 29 | - |
dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
dc.date.awarded | 2017-02 | - |
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