Towards differentiation of confined buoyancy-driven turbulence
Description of Research
We encounter turbulent buoyancy driven flows in a wide range of natural and man-made environments, such as in atmospheric circulation or ventilation in buildings. Apart from properties inherent to the fluid, the respective flow is determined by the boundary conditions of the considered domain. In an applied context, these boundary conditions are often the only parameters open to manipulation and represent a primary source of uncertainties. It is thus highly desirable to understand the impact of the boundary conditions on the flow. Such sensitivity information enables us to e.g. to quantify the impact of uncertainties, investigate the stability of the system or determine extrema, which can be utilised in design optimisation or the construction of a worst-case scenario.
Using direct numerical simulations, I investigate confined buoyancy driven flows with different combinations of isolated and distributed sources of boundary heating. Among others, we aim to understand the boundary conditions effect on the topology of the mean flow, the resulting temperature field, the distribution of the mixing and the local values of the energy budget.
Johanna is a graduate with a BSc in Physics and an MSc in Theoretical physics, both from the Friedrich-Schiller-University Jena, Germany.
PhD Candidate - Fluid Mechanics
Department of Civil & Environmental Engineering
Imperial College London SW7 2AZ