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Turbulent Rotating Convection to the Extreme

Total Cost €


EC-Contrib. €






Project "TROCONVEX" data sheet

The following table provides information about the project.


Organization address
address: GROENE LOPER 3
postcode: 5612 AE

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Total cost 1˙804˙543 €
 EC max contribution 1˙804˙543 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-STG
 Funding Scheme ERC-STG
 Starting year 2016
 Duration (year-month-day) from 2016-04-01   to  2021-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The aim of this project is to understand the processes involved in heat and energy transfer of geostrophic turbulent convection, to identify the structure of this seemingly featureless flow, and to model its global convective heat transfer based on these new insights. The geostrophic regime of turbulent rotating convection is relevant for many geophysical and astrophysical flows. The flow behaviour in this regime displays significant and unexpected differences with the traditionally studied regime, making extrapolations impossible. Heat-transfer models of geophysical and astrophysical flows are an essential part of assessing their energy balance for e.g. climate modelling. Geostrophic turbulent convection is characterised by combined strong thermal forcing and rapid rotation, making it hard to replicate in experiments and computations.We propose a revolutionary experiment capable of covering an unprecedented part of this new regime. Heat-flux measurements and optical diagnostics of the flow using stereoscopic particle image velocimetry are featured. The experiment is complemented with highly optimised parallel computations to gain access to additional flow information in parts of the parameter range. The focus is on the small-scale energy transfer processes and the influence of presence or absence of (Ekman-type) boundary layers, both of which are decisive for the flow organisation into structures and subsequently for the global heat transfer. We will characterise the heat transfer and energy cascade processes in the flow as a function of the governing parameters quantifying buoyant forcing and rotation. We will address open questions on the heat-flux scaling of geostrophic convection and its dependence on the types of coherent structures being formed, effects of boundary-layer dynamics and energy cascade mechanisms in the flow. These insights will allow us to model the heat flux, a crucial result for the understanding of convection in geo- and astrophysics.


year authors and title journal last update
List of publications.
2019 Kim M. J. Alards, Rudie P. J. Kunnen, Richard J. A. M. Stevens, Detlef Lohse, Federico Toschi, Herman J. H. Clercx
Sharp transitions in rotating turbulent convection: Lagrangian acceleration statistics reveal a second critical Rossby number
published pages: , ISSN: 2469-990X, DOI: 10.1103/physrevfluids.4.074601
Physical Review Fluids 4/7 2019-09-04
2018 Jonathan S. Cheng, Jonathan M. Aurnou, Keith Julien, Rudie P. J. Kunnen
A heuristic framework for next-generation models of geostrophic convective turbulence
published pages: 277-300, ISSN: 0309-1929, DOI: 10.1080/03091929.2018.1506024
Geophysical & Astrophysical Fluid Dynamics 112/4 2019-07-08
2017 Kim M. J. Alards, Hadi Rajaei, Lorenzo Del Castello, Rudie P. J. Kunnen, Federico Toschi, Herman J. H. Clercx
Geometry of tracer trajectories in rotating turbulent flows
published pages: , ISSN: 2469-990X, DOI: 10.1103/PhysRevFluids.2.044601
Physical Review Fluids 2/4 2019-04-30
2018 Kim M. J. Alards, Hadi Rajaei, Rudie P. J. Kunnen, Federico Toschi, Herman J. H. Clercx
Directional change of tracer trajectories in rotating Rayleigh-Bénard convection
published pages: , ISSN: 2470-0045, DOI: 10.1103/PhysRevE.97.063105
Physical Review E 97/6 2019-04-30
2016 Hadi Rajaei, Pranav Joshi, Rudie P. J. Kunnen, Herman J. H. Clercx
Flow anisotropy in rotating buoyancy-driven turbulence
published pages: , ISSN: 2469-990X, DOI: 10.1103/PhysRevFluids.1.044403
Physical Review Fluids 1/4 2019-04-30
2018 Hadi Rajaei, Kim M. J. Alards, Rudie P. J. Kunnen, Herman J. H. Clercx
Velocity and acceleration statistics in rapidly rotating Rayleigh–Bénard convection
published pages: 374-397, ISSN: 0022-1120, DOI: 10.1017/jfm.2018.751
Journal of Fluid Mechanics 857 2019-04-30
2017 Hadi Rajaei, Rudie P. J. Kunnen, Herman J. H. Clercx
Exploring the geostrophic regime of rapidly rotating convection with experiments
published pages: 45105, ISSN: 1070-6631, DOI: 10.1063/1.4980072
Physics of Fluids 29/4 2019-04-30

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