Transient dynamics of accelerating turbulent pipe flow
| dc.contributor.author | Guerrero Hinojosa, B. | |
| dc.contributor.author | Lambert, M.F. | |
| dc.contributor.author | Chin, R.C. | |
| dc.date.issued | 2021 | |
| dc.description.abstract | The transient dynamics of accelerating turbulent pipe flow has been examined using direct numerical simulation (DNS) data sets with a high spatiotemporal resolution, starting from low and moderate Reynolds numbers. The time-dependent evolution of the mean flow dynamics reveals that internal flows, during and after a rapid increase in the flow rate, experience four unambiguous transient stages: inertial, pre-transition, transition and core relaxation before they reach their final steady-state. The first stage is characterised by a rapid and substantial increment in the viscous forces within the viscous sublayer, together with the frozen behaviour of the existing turbulent eddies. The pre-transitional stage reveals a weak response of the turbulent inertia within the near-wall region, together with a rapid reduction in the viscous forces. At the third stage, termed transition, balanced growth in the magnitude of both the turbulent and the viscous forces within is observed. The final stage, referred to as core relaxation, shows a quasi-steady behaviour at | |
| dc.description.statementofresponsibility | Byron Guerrero, Martin F. Lambert, Rey C. Chin | |
| dc.identifier.citation | Journal of Fluid Mechanics, 2021; 917:071202-1-071202-9 | |
| dc.identifier.doi | 10.1017/jfm.2021.303 | |
| dc.identifier.issn | 0022-1120 | |
| dc.identifier.issn | 1469-7645 | |
| dc.identifier.orcid | Guerrero Hinojosa, B. [0000-0001-7890-6265] | |
| dc.identifier.orcid | Lambert, M.F. [0000-0001-8272-6697] | |
| dc.identifier.orcid | Chin, R.C. [0000-0002-2709-4321] | |
| dc.identifier.uri | http://hdl.handle.net/2440/130950 | |
| dc.language.iso | en | |
| dc.publisher | Cambridge University Press | |
| dc.relation.grant | ARC | |
| dc.rights | © The Author(s), 2021. Published by Cambridge University Press. | |
| dc.source.uri | https://doi.org/10.1017/jfm.2021.303 | |
| dc.subject | Pipe flow; turbulence simulation; turbulent transition | |
| dc.title | Transient dynamics of accelerating turbulent pipe flow | |
| dc.type | Journal article | |
| pubs.publication-status | Published |