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Tag archive: APS-DFD

Watch: Ventilation and COVID-19

Dr Tom Crawford | 10 Dec 2020

Experiments visualising the airflow when breathing, speaking and laughing, show that wearing a mask indoors can drastically reduce the risk of transmission of airborne particles.…


Watch: How do Sperm Swim?

Dr Tom Crawford | 9 Nov 2020

The tail (flagellum) of the sperm does not simply push the body, but uses a rhythmical beating with pushing and fraying over a 4-beat pattern, as demonstrated in the video.…


Watch: How do Birds Fly in Strong Winds?

Dr Tom Crawford | 5 Nov 2020

When navigating strong crosswinds birds adjust the angle of their body into the wind, whilst keeping their head fixed on the target destination, in order to maintain forwards motion.…


Watch: Underwater Robots based on the Loch Ness Monster

Dr Tom Crawford | 25 Sep 2020

Current underwater vehicles are either difficult to manoeuvre making them unsuitable for sensitive work, or are extremely expensive. Gabe Weymouth and his team at the University of Southampton are designing new underwater robots based on the Plesiosaur – the dinosaur behind the legend of the Loch Ness Monster – which are much smaller, cheaper and more energy efficient.…


Watch: Simulations of Mixing Fluids

Dr Tom Crawford | 23 Sep 2020

From rotating impellers stirring air into a liquid, to a turbulent jet entering a moving flow, mixing processes are essential to almost every industrial application you can think of.…


Watch: How do Cloaking Devices Work?

Dr Tom Crawford | 21 Sep 2020

When an object, such as an aircraft or submarine, moves through a fluid it generates a ‘wake’ behind it which can be used by monitoring tools to detect its size and position.…


Watch: How Do Snakes Catch Their Prey Underwater?

Dr Tom Crawford | 16 Sep 2020

When catching prey underwater snakes use two main techniques: the frontal strike and the lateral strike. By studying real snakes in the lab at ESPCI/MNHN, Marion Segall was able to recreate the setup using a 3D-printed snake head and laser visualisation techniques, which allowed for the forces involved in each strike to be measured.…


Watch: How is Toothpaste made?

Dr Tom Crawford | 24 Jun 2020

The manufacturing process for toothpaste involves mixing together several fluid and solid components to create the non-Newtonian polymer used to clean your teeth.…


Watch: Natural Ventilation of Termite Mounds

Dr Tom Crawford | 22 Jun 2020

Termites live underground in termite mounds to protect themselves from the heat of the desert, but how do they keep their mounds cool?…


Watch: Listening to Tornadoes

Dr Tom Crawford | 19 Jun 2020

Before a tornado forms the pressure drop at the centre emits a dull tone at 5-10Hz which can be detected hours before it becomes dangerous.…


Watch: Spike Waves, Rogue Waves, and Hokusai’s Great Wave off Kanagawa

Dr Tom Crawford | 16 Mar 2020

Rogue Waves occur when a larger wave appears in a group of smaller waves. In some circumstances these can lead to an exaggerated ‘Spike Wave’, or a crashing wave resembling the Great Wave off Kanagawa by Hokusai.…


Watch: Smelling Underwater with the Star-Nosed Mole

Dr Tom Crawford | 12 Mar 2020

Star-nosed moles are able to smell underwater by quickly exhaling and re-inhaling air bubbles as they search for prey. The bubbles are trapped close to the moles nostrils by a ring of tiny pink tentacles, which gives rise to the name ‘star-nosed’.…


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