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Large Eddy Simulation of Conjugate Heat Transfer in a Ribbed Channel: Reynolds Number Effect
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ahn, Joon | - |
dc.contributor.author | Song, Jeong Chul | - |
dc.contributor.author | Lee, Joon Sik | - |
dc.date.accessioned | 2023-01-09T02:46:34Z | - |
dc.date.available | 2023-01-09T02:46:34Z | - |
dc.date.created | 2022-11-23 | - |
dc.date.issued | 2022-10 | - |
dc.identifier.citation | Processes, Vol.10 No.10, p. 1928 | - |
dc.identifier.issn | 2227-9717 | - |
dc.identifier.uri | https://hdl.handle.net/10371/188949 | - |
dc.description.abstract | Large eddy simulations were performed for the conjugate heat transfer in a ribbed channel with a geometry, that mimics the internal cooling passage of a gas turbine, using 566, 100, 10, and 1 as the solid and fluid thermal conductivity ratios (K*) and 30,000, 7000 (turbulent flow), and 1000 (laminar flow) as the Reynolds numbers. A fully coupled simulation was conducted using the immersed boundary method (IBM) and a dynamic sub-grid-scale (SGS) model. In pure convection, a decrease in the Reynolds number from 30,000 to 7000 increased the heat transfer on the channel wall by 5% but decreased that on the rib by 20%. When K* > 10, the Reynolds number effect is stronger in the rib than in the wall. In the laminar flow, the effect of conduction appears at a low K*, and the heat transfer promotion is poor in the typical ribbed channel geometry. In the turbulent flow, if K* >= 100, then a heat transfer promotion is expected in the ribbed channel even at a low Reynolds number. For K* < 10, the thermal performance in the turbulent flow is worse than that in the laminar flow, and thus, no rib effect is expected. | - |
dc.language | 영어 | - |
dc.publisher | MDPI AG | - |
dc.title | Large Eddy Simulation of Conjugate Heat Transfer in a Ribbed Channel: Reynolds Number Effect | - |
dc.type | Article | - |
dc.identifier.doi | 10.3390/pr10101928 | - |
dc.citation.journaltitle | Processes | - |
dc.identifier.wosid | 000873676900001 | - |
dc.identifier.scopusid | 2-s2.0-85140982193 | - |
dc.citation.number | 10 | - |
dc.citation.startpage | 1928 | - |
dc.citation.volume | 10 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Lee, Joon Sik | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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