The dynamics of finite-size settling particles
This book contributes to the fundamental understanding of the physical mechanisms that take place in pseudo turbulent particulate flows. In the present work we have considered the sedimentation of large numbers of spherical rigid particles in an initially quiescent flow field. We have performed dire...
I tiakina i:
| Kaituhi matua: | |
|---|---|
| Hōputu: | Online |
| Reo: | Ingarihi |
| I whakaputaina: |
KIT Scientific Publishing
2021
|
| Ngā marau: | |
| Urunga tuihono: | 34497 |
| Ngā Tūtohu: |
Kāore He Tūtohu, Me noho koe te mea tuatahi ki te tūtohu i tēnei pūkete!
|
| _version_ | 1869522773897904128 |
|---|---|
| author | Doychev, Todor |
| author_browse | Doychev, Todor |
| author_facet | Doychev, Todor |
| author_sort | Doychev, Todor |
| collection | Directory of Open Access Books |
| description | This book contributes to the fundamental understanding of the physical mechanisms that take place in pseudo turbulent particulate flows. In the present work we have considered the sedimentation of large numbers of spherical rigid particles in an initially quiescent flow field. We have performed direct numerical simulations employing an immersed boundary method for the representation of the fluid-solid interface. The results evidence that depending on the particle settling regime (i.e. Galileo number and particle-to-fluid density ratio) the particles may exhibit strong inhomogeneous spatial distribution. It is found that the particles are preferentially located in regions with downward fluid motion. The particles inside clusters experience larger settling velocities than the average. The flow in all flow cases is observed to exhibit characteristic features of pseudo-turbulence. The particle-induced flow field is further found to be highly anisotropic with dominant vertical components. The results indicate that, in the present flow configurations, the collective and mobility effects play significant role for the particle and fluid motion. |
| format | Online |
| id | doab-20.500.12854ir-45583 |
| institution | Directory of Open Access Books |
| language | eng |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | KIT Scientific Publishing |
| publisherStr | KIT Scientific Publishing |
| record_format | ojs |
| spelling | doab-20.500.12854ir-455832024-04-11T15:10:20Z The dynamics of finite-size settling particles Doychev, Todor TA1-2040 Partikel-Strömung Multiphasenströmungen DNS Suspensionsmultiphase and particle-laden flows immersed boundary method Immersed boundary thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology This book contributes to the fundamental understanding of the physical mechanisms that take place in pseudo turbulent particulate flows. In the present work we have considered the sedimentation of large numbers of spherical rigid particles in an initially quiescent flow field. We have performed direct numerical simulations employing an immersed boundary method for the representation of the fluid-solid interface. The results evidence that depending on the particle settling regime (i.e. Galileo number and particle-to-fluid density ratio) the particles may exhibit strong inhomogeneous spatial distribution. It is found that the particles are preferentially located in regions with downward fluid motion. The particles inside clusters experience larger settling velocities than the average. The flow in all flow cases is observed to exhibit characteristic features of pseudo-turbulence. The particle-induced flow field is further found to be highly anisotropic with dominant vertical components. The results indicate that, in the present flow configurations, the collective and mobility effects play significant role for the particle and fluid motion. 2021-02-11T11:51:46Z 2021-02-11T11:51:46Z 2019-07-30 20:01:58 2015 book 34497 14394111 9783731503071 https://directory.doabooks.org/handle/20.500.12854/45583 eng Dissertationsreihe am Institut für Hydromechanik, Karlsruher Institut für Technologie / Karlsruher Institut für Technologie (KIT), Institut für Hydromechanik image/jpeg Attribution-ShareAlike 4.0 International https://www.ksp.kit.edu/9783731503071 KIT Scientific Publishing 10.5445/KSP/1000044723 10.5445/KSP/1000044723 68fffc18-8f7b-44fa-ac7e-0b7d7d979bd2 9783731503071 XIX, 238 p. open access |
| spellingShingle | TA1-2040 Partikel-Strömung Multiphasenströmungen DNS Suspensionsmultiphase and particle-laden flows immersed boundary method Immersed boundary thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology Doychev, Todor The dynamics of finite-size settling particles |
| title | The dynamics of finite-size settling particles |
| title_full | The dynamics of finite-size settling particles |
| title_fullStr | The dynamics of finite-size settling particles |
| title_full_unstemmed | The dynamics of finite-size settling particles |
| title_short | The dynamics of finite-size settling particles |
| title_sort | dynamics of finite size settling particles |
| topic | TA1-2040 Partikel-Strömung Multiphasenströmungen DNS Suspensionsmultiphase and particle-laden flows immersed boundary method Immersed boundary thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology |
| topic_facet | TA1-2040 Partikel-Strömung Multiphasenströmungen DNS Suspensionsmultiphase and particle-laden flows immersed boundary method Immersed boundary thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology |
| url | 34497 |
| work_keys_str_mv | AT doychevtodor thedynamicsoffinitesizesettlingparticles AT doychevtodor dynamicsoffinitesizesettlingparticles |