Academic webpage Title: Oscillatory Reconnection Abstract: Magnetic reconnection is a fundamental plasma process at the heart of many dynamic events such as solar flares. These are clearly time-dependent events, and so we require time-dependent reconnection models to capture this dynamic behaviour. In this talk, I will describe ongoing investigations into “Oscillatory Reconnection”: a type of…
Academic webpage Title: Untangling waves and mean flows via PDE-based Lagrangian filtering Abstract: Oceanic flows are typically composed of wave and mean motions with a wide range of overlapping temporal scales, making separation between the two types of motion in wave resolving numerical simulations challenging. Lagrangian filtering – whereby a temporal filter is appliedin the frame…
Academic webpage Title: Postponed to a later date.
Academic webpage Title: What can flow down a pipe teach us about the geodynamo (and other nonlinear stability problems)? Abstract: The Geomagnetic field is generated in the rapidly rotating fluid outer core of the Earth on a vast range of temporal scales. This leads to the presence of slow balanced motions and fast waves, which…
Academic webpage Title: Multicellular Calculus Abstract: The disordered and granular nature of multicellular tissues endows them with exotic mechanical properties and presents challenges to continuum modelling frameworks. To address this, many researchers use the vertex model as a convenient computational tool with which to simulate epithelia, the cell layers that coat developing embryos or provide protective…
Academic webpage Title: Turbulent damping of fast oscillations by a convective flow Abstract:Traditional mixing-length models describe tidal dissipation in convective flows as a large-scale oscillation damped by an effective turbulent viscosity that is artificially reduced when the oscillation period is much shorter than the convective turnover time. This yields dissipation rates far below observational constraints. From first principles,…
Academic webpage Title: Phase transitions from the viewpoint of an applied mathematician Abstract: Evaporation, supercooling, and related phenomena can be described using hydrodynamic, kinetic, or mixed models – which yield results differing by up to two orders of magnitude. Furthermore, these theoretical predictions disagree with at least some experimental results, which themselves are not mutually consistent:…
Academic Webpage Title: Dissecting the Role of Phenotypic Variation in Cell Population Growth and Collective Self-Generated Chemotaxis Abstract: Phenotypic variation is a ubiquitous feature of biological cell populations, even in genetically identical cells growing in uniform environments. Such variability can have profound consequences for population-level behaviour, particularly under stress, yet it is often neglected in…
Academic Webpage Title: From Linear Regression to Gaussian Neural Networks: Diagnosing the Evolving SST–NAO Teleconnection Under Climate Change Using Explainable Machine Learning Abstract: The North Atlantic Oscillation — a large-scale seesaw in atmospheric pressure between the Azores and Iceland — is the single most important driver of winter weather variability across Europe and the North…
Academic Webpage Title: Wave propagation in reaction-diffusion equations Abstract: I'll talk about a broad class of scalar nonlinear parabolic equations, extending the established concepts of pulled and pushed fronts (conventional travelling waves of constant speed) to more extreme cases that allow the classification of the variety of potential behaviour. The work is motivated by tissue-growth…
Academic Webpage Date/Time/Location: Maths Lecture Theatre B, 1405-1455, Friday 17th April Title: The fine scales of solar chromospheric flares Abstract: A solar flare is an intense but short-lived release of energy from the Sun's magnetically-dominated atmosphere, resulting in the acceleration of non-thermal particles, plasma heating, and radiation across the entire electromagnetic spectrum. Most energy released is radiated by…