Geoffrey M. Evans

In an era of intergenerational inequality and political polarization, what might make older voters support greater government spending on the young? Building on literature concerning family-centric political preferences, we theorize that older voters support pro-youth policies and vote for pro-youth parties when they perceive younger relatives to be struggling financially due to emotional bonds and shared risks. Using a large, original survey of British adults, we find that negative evaluations of the financial wellbeing of one’s younger relatives – which are linked to their objective economic assets – are associated with support and prioritization of state investment in education, childcare and housing. They are also associated with opposition to the incumbent Conservatives, in a relationship mediated by assessments that this party represents young people badly. The implications are important for understanding how emotional connections, more than self-interest, sensitize voters to family-wide economic hardship and help produce ‘family-centric’ economic voting.

In this paper, droplet vaporization dynamics in a heated bubbling fluidized bed was studied. A volatile hydrocarbon liquid jet comprising acetone was injected into a hot bubbling fluidized bed of Geldart A-type glass ballotini particles heated at 150 °C, well above the saturation temperature of acetone (56 °C). Intense interactions were observed among the evaporating droplets and hot particles during contact with the re-suspension of particles due to a release of vapour. A non-intrusive schlieren imaging method was used to track the hot air and vapour mixture plume in the freeboard region of the bed and the acetone vapour fraction therein was mapped. The jet vaporization dynamics in the bubbling fluidized bed was modelled in a Eulerian–Lagrangian CFD (computational fluid dynamics) modelling framework involving heat and mass transfer sub models. The CFD model indicated a dispersion of the vapour plume from the evaporating droplets which was qualitatively compared with the schlieren images. Further, the CFD simulation predicted a significant reduction (~60 °C) in the local bed temperature at the point of the jet injection, which was indirectly confirmed in an experiment by the presence of particle agglomerates.

Like much of the European centre-left, Britain's Labour Party has struggled to appeal to its former core working class support base in recent years. However, this is largely a failure to connect with the ‘white working class’ (WWC) specifically, whereas support among ethnic minorities remains robust. We hypothesise that Labour could be experiencing a ‘trade-off’, whereby efforts to cater to minorities harm its perceived ability to represent WWC interests. We test this thesis by examining whether WWC voters are more likely to view minority and working class representation in zero-sum terms and shun Labour when they associate the party with minority interests. We show that the WWC are somewhat less likely to view working class and ethnic minority representation as strongly correlated, and Labour's perceived ability to represent minorities is negatively associated with WWC support. This is not (primarily) about ethnocentrism. Instead, we suggest that ‘relative political deprivation’ is crucial.

In multiphase particulate systems, the turbulence of the continuous phase (gas or liquid) is modulated due to interactions between the continuous phase and the suspended particles. Such phenomena are non-trivial in the essence that addition of a dispersed phase to a turbulent flow complicates the existing flow patterns depending on the physical properties of the particles leading to either augmentation or attenuation of continuous phase turbulence. In the present study, this aspect has been comprehensively analysed based on the available experimental data obtained from the well-studied turbulent flow systems such as channel and pipes, free jets and grids. Relevant non-dimensional parameters such as particle diameter to integral length scale ratio, Stokes number, particle volume fraction, particle momentum number, and particle Reynolds number have been utilised to characterise the reported turbulence modulation behavior. Some limitations of these commonly used dimensionless parameters to characterise turbulence modulation are discussed, and possible improvements are suggested.

A problem associated with gas injection into molten metal through tuyeres is the accelerated erosion of refractory lining due to a back attack phenomenon caused by pressure and liquid velocity fluctuations impinging on the refractory surface. Back attack is closely linked to the gas conditions at tuyere exit, and in this study a computational (CFX-F3D) model has been used to predict the radial velocity, density and temperature profiles for gas flow exiting a circular tuyere into a molten metal bath. It was found that both the adiabatic and non-adiabatic models predicted a deficit in the mass flux and dynamic pressure in the body of fluid adjacent to the tuyere wall when compared with fluid in the centre of the tuyere. The deficit at the walls is used to explain, qualitatively, the back-attack phenomenon.