Cloud Dispersal in Turbulent Flows
Cold clouds embedded in warm media are very common objects in astrophysics. Their disruption timescale depends strongly on the dynamical configuration. We discuss the evolution of an initially homogeneous cold cloud embedded in warm turbulent gas. Within a couple of dynamical timescales, the filling...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2006
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| _version_ | 1826265277571006464 |
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| author | Heitsch, F Slyz, A Devriendt, J Burkert, A |
| author_facet | Heitsch, F Slyz, A Devriendt, J Burkert, A |
| author_sort | Heitsch, F |
| collection | OXFORD |
| description | Cold clouds embedded in warm media are very common objects in astrophysics. Their disruption timescale depends strongly on the dynamical configuration. We discuss the evolution of an initially homogeneous cold cloud embedded in warm turbulent gas. Within a couple of dynamical timescales, the filling factor of the cold gas within the original cloud radius drops below 50%. Turbulent diffusivities estimated from the time evolution of radial filling factor profiles are not constant with time. Cold and warm gas are bodily transported by turbulence and mixed. This is only mildly indicated by column density maps. The radiation field within the cloud, however, increases by several orders of magnitudes due to the mixing, with possible consequences for cloud chemistry and evolution within a few dynamical timescales. |
| first_indexed | 2024-03-06T20:21:09Z |
| format | Journal article |
| id | oxford-uuid:2dd56def-153b-4e5e-97ff-9685a65eb83f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:21:09Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:2dd56def-153b-4e5e-97ff-9685a65eb83f2022-03-26T12:45:27ZCloud Dispersal in Turbulent FlowsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2dd56def-153b-4e5e-97ff-9685a65eb83fEnglishSymplectic Elements at Oxford2006Heitsch, FSlyz, ADevriendt, JBurkert, ACold clouds embedded in warm media are very common objects in astrophysics. Their disruption timescale depends strongly on the dynamical configuration. We discuss the evolution of an initially homogeneous cold cloud embedded in warm turbulent gas. Within a couple of dynamical timescales, the filling factor of the cold gas within the original cloud radius drops below 50%. Turbulent diffusivities estimated from the time evolution of radial filling factor profiles are not constant with time. Cold and warm gas are bodily transported by turbulence and mixed. This is only mildly indicated by column density maps. The radiation field within the cloud, however, increases by several orders of magnitudes due to the mixing, with possible consequences for cloud chemistry and evolution within a few dynamical timescales. |
| spellingShingle | Heitsch, F Slyz, A Devriendt, J Burkert, A Cloud Dispersal in Turbulent Flows |
| title | Cloud Dispersal in Turbulent Flows |
| title_full | Cloud Dispersal in Turbulent Flows |
| title_fullStr | Cloud Dispersal in Turbulent Flows |
| title_full_unstemmed | Cloud Dispersal in Turbulent Flows |
| title_short | Cloud Dispersal in Turbulent Flows |
| title_sort | cloud dispersal in turbulent flows |
| work_keys_str_mv | AT heitschf clouddispersalinturbulentflows AT slyza clouddispersalinturbulentflows AT devriendtj clouddispersalinturbulentflows AT burkerta clouddispersalinturbulentflows |