Change search
ReferencesLink to record
Permanent link

Direct link
A simulation modeling approach to hydrothermal plumes and its comparison to analytical models
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
2013 (English)In: Ocean Modelling, ISSN 1463-5003, Vol. 61, 68-80 p.Article in journal (Refereed) Published
Abstract [en]

We study the dynamics of hydrothermal plumes with the 3D time-dependent, Eulerian, adaptive mesh refinement code GERRIS, which solves the equations of viscous, incompressible hydrodynamics. We have implemented a new module into Gerris that treats buoyancy-driven turbulence by means of a subgrid mode. Our model is validated in numerical experiment and applied to the dynamics of a rising plume. First we simulate hydrothermal plumes in a static environment and compare our results to the widely used integral models (MTT or Briggs' model). The entrainment coefficient that we deduce from simulations falls into the range of the experimentally determined values. We also investigate the ratio between the level of the neutral-buoyancy layer and the maximum plume height. This ratio is frequently used to estimate plume heat flux via the measured level of neutral buoyancy. Although the ratio is only moderately (less than 10%) higher than the one predicted by the integral model, heat flux estimations can be substantially different. Finally, we explore the importance of background currents. We find that the simulated trajectories agree with integral models in the rising stage but the subsequent oscillations around the neutral-buoyancy layer are damped much more quickly and the level of the neutral buoyancy is also higher, same as the calm environment cases. By simulating the oscillation of a plume with suppressed transported turbulence and find a stronger oscillation than the original simulation, we suggest that a significant fraction of the difference between our model and the integral model can be explained by the absence of the turbulent transport of the latter.

Place, publisher, year, edition, pages
2013. Vol. 61, 68-80 p.
Keyword [en]
Hydrothermal plume, Hydrothermal, Buoyant plume, Plume modeling, Three-dimensional model
National Category
Oceanography, Hydrology, Water Resources Meteorology and Atmospheric Sciences
URN: urn:nbn:se:su:diva-88306DOI: 10.1016/j.ocemod.2012.10.001ISI: 000313594700005OAI: diva2:611900


Available from: 2013-03-19 Created: 2013-03-12 Last updated: 2013-03-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Rosswog, Stephan
By organisation
Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Ocean Modelling
Oceanography, Hydrology, Water ResourcesMeteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 40 hits
ReferencesLink to record
Permanent link

Direct link