Turbulence in clouds causes the liquid water droplets to collide and coalesce, forming larger and larger droplets until they are eventually large enough to fall as raindrops. Our understanding of the interaction between cloud-turbulence and droplets is, however, limited for all droplets except the very smallest that form directly from the condensation of water vapour. This drives large uncertainties in numerical weather prediction (NWP) for global climate models, which in turn has important consequences since clouds play a vitally important role in the global energy budget. In this project we will conduct state-of-the-art numerical simulations of water droplets that are large enough to initiate a two-way coupling between the droplets and the cloud-turbulence on some of the world’s leading supercomputers to better understand these droplet – turbulence interactions, and as a result generate a better understanding of the cloud microphysics behind the generation of rainfall. This will be in support of a NERC-funded project, including the Met Office, to try and improve the parameterisation of cloud microphysics for more accurate NWP.

Objectives

1. Conduct high-fidelity simulations of cloud-like turbulence containing “large” water droplets using supercomputers.
2. Identify the physics of the two-way interaction between the turbulence and the droplets and any departures from the “classical” behaviour.
3. Identify ways in which this interaction can be parameterised.
4. Disseminate your findings to the scientific community through archival scientific publications in top journals and attendance at international conferences.

Supervisors

Prof. Oliver Buxton, whose expertise lies in turbulence (with applications to cloud microphysics) and Prof. Sylvain Laizet whose expertise lies in computational fluid dynamics, high performance computing and turbulence.

Learning opportunities

You will develop knowledge and expertise in turbulence, high performance computing, and computational fluid dynamics.

Professional Development

You will have access to engaging professional development workshops in areas such as research communication, computing and data science, and professional progression through our Graduate School.

Duration: 3.5 years.

Eligibility

You must possess (or expect to gain) a first-class honours M.Eng./M.Sc. or higher degree or equivalent in Aeronautics/Aerospace Engineering, Mechanical Engineering, Computing, Physics or related areas.

How to apply:

Submit your application at: www.imperial.ac.uk/study/apply/postgraduate-doctoral/application-process/ You will need to include the reference AE0066 and address your application to Department of Aeronautics.

For queries regarding the application process, please contact Lisa Kelly at: [email protected]

For further information: you can email Prof. Oliver Buxton [email protected] or Prof. Sylvain Laizet [email protected] .

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