Snabbfakta
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- London
Ansök senast: 2025-02-04
Research Assistant / Associate in experimental fluid mechanics to study cloud-turbulence
Applications are invited for a fully funded fixed-term at the Research Assistant / Associate (PostDoc) level in experimental fluid mechanics to study cloud-turbulence.
Rain formation is a critical part of the planetary energy balance yet the uncertainties in our ability to predict it are high. A large portion of this uncertainty is driven by the as-yet unknown interactions between high Reynolds number cloud-turbulence and liquid water droplets in clouds. This uncertainty can lead to a lack of accuracy in numerical weather prediction, driving uncertainty in future climate projections. Cloud adjustments in climate models are represented through changes to processes converting cloud water to rain, known as “autoconversion”. Cloud droplets initially form via condensation of humid air, however the formation of raindrops is accelerated by the turbulence-driven collision/coalescence process between these smaller droplets.
The objective of this project is to reduce uncertainty in parameterisations of autoconversion and to assess newly-developed autoconversion parameterisations against historical and satellite data. Achieving this ambitious goal requires obtaining and analysing high-quality experimental datasets in highly turbulent flows.
You will conduct advanced laser-based diagnostics (particle image velocimetry, PIV and particle tracking velocimetry, PTV) in the flagship wind tunnel of the National Wind Tunnel Facility (the 10x5 wind tunnel) at Imperial College London, with a focus on better understanding how turbulence and associated intermittency can impact droplet dynamics, and hence rain formation in clouds. Furthermore, you will contribute towards developing more accurate numerical weather prediction models based on your findings.
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