How CFD Can Help Meet Dam Safety Regulations

Although the probability of a dam failure is often low, the consequences of one can be catastrophic. In the US, since 1980, there have been on average 24 dam failures per year, with overtopping the most common cause. Overtopping is where excess river flow causes the water level to spill over the top of the […]

How to Simulate the Piston Effect in Train Tunnels

Why do you have to yawn or swallow to equalize the pressure in your ears when travelling through a tunnel? It’s all to do with a phenomena called the piston effect. What is the piston effect? When a train enters a tunnel, it compresses the air ahead of it, as the air it displaces is […]

Wind Squall CFD Simulation with HELYX

In central Europe, in the height of summer, especially in the evening of hot days, it is not uncommon to experience heavy thunderstorms. During one such event in summer 2019, I witnessed, what looked like, a dust devil forming for a few moments, which then also ripped off the larger part of the roof of […]