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Approach for Dealing with Turbulent Flow over a Surface Mounted Cube : Part 1 – Low Reynolds Number
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ariff, Mohd Salim, Salim Mohamed Cheah, Siew Cheong |
| Copyright Year | 2009 |
| Abstract | An approach for dealing with turbulent flows over a surface-mounted cube using the wall y as guidance in selecting the appropriate grid configuration and corresponding turbulence models are investigated using Fluent. The study is divided into two parts Part I and Part II, dealing with low and high Reynolds numbers, respectively. In Part I presented here, a Reynolds number of 1,870 based on cube height and bulk velocity is investigated and the computation results are compared with data from Meinders et al. (1999) on „the experimental study of local convective heat transfer from a wallmounted cube in turbulent channel flow.‟ The standard kε, standard k-ω, Reynolds Stress Model (RSM), SpalartAllmaras (SA) and renormalization group (RNG) k-ε turbulence models are used to solve the closure problem. Their behaviours together with the accompanying nearwall treatments are investigated for wall y≈1 covering the viscous sublayer and y≈7 in the buffer region. Notably, adopting a wall y in the log-law region, where y >30, would result in a poor mesh resolution due to the low Reynolds number of the main flow but is taken into consideration in the high Reynolds number flow case (Part 2 – Ariff et al., 2009). Overall, SA gave better agreement with experimental data and predicted the re-attachment length similar to DNS results as reported by Alexandar et al. (2006). |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.cfd.com.au/cfd_conf09/PDFs/142SAL.pdf |
| Alternate Webpage(s) | http://www.cfd.com.au/cfd_conf09/PDFs/141SAL.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
