#instability

🟡 Arrest | 6/10 🇮🇶 Arrest of former Iraqi MP in Baghdad Security forces arrested former Iraqi MP Talal al-Zubaidi in Baghdad. Gunshots were reported during the arrest. #OSINT #NewsGroup #Iraq #PoliticalArrest #Instability

Starmer’s resignation is latest product of the #chaos of First Past the Post (FPTP) #Starmer’s #resignation should be a moment of reckoning. It is finally time to ask the tough questions about how we choose our #leaders, and how we choose the system that chooses them. It would be easy to blame individual leaders. Whilst that inevitably plays a part, the #instability we are living through runs deeper than who occupies Number 10... #FPTP #UK #elections #democracy #voting #vote [1/2]

Richtmyer-Meshkov Instability If you send a shock wave through a magnetized plasma–something that happens in both supernova explosions and inertial confinement fusion–it can trigger an instability known as the Richtmyer-Meshkov instability. The image above shows a form of this, taken from a simulation. Rather than treating the plasma as a single idealized fluid, the researchers represented it as two fluids: an ion fluid and an electron fluid. This allowed them to better capture what happens when certain components of the plasma react to changes faster than others do. The image itself shows the electron number density across the fluid, where darker colors represent higher electron number density. The interface between high and low-densities shows a roll-up instability that resembles the Kelvin-Helmholtz instability, but there are also regions of mushroom-like plumes that more closely resemble Rayleigh-Taylor instabilities. The authors note that these structures don’t appear in simulations that represent a plasma as a single fluid; you need the two-fluid representation to see them. (Image and research credit: O. Thompson et al.) #CFD #computationalFluidDynamics #fluidDynamics #instability #KelvinHelmholtzInstability #magnetohydrodynamics #numericalSimulation #physics #plasma #RayleighTaylorInstability #RichtmyerMeshkovInstability #science #shockwave