Caption: Thermographic footage showing the behaviour of hot water added to cooler water. Brighter areas show hotter temperatures. In the frame on the left, the hot water is dropped onto the surface of the cooler water. As hot water is less dense than cold water, it floats on the surface and there is very little mixing. This is similar to the atmospheric phenomenon called a temperature inversion, which can trap air pollution near the ground in a cold layer of air. At right, the hot water is pipetted to the bottom of the glass. In this case it quickly rises through the cold water, leading to mixing of the layers and a homogeneous temperature.

Release details: Model release not required. Property release not required.

Keywords: cold, colder, comparing, comparison, contrast, convection, convective, cooler, cooling, demonstration, dynamics, education, educational, false-colour, false-coloured, fluid, fluids, glass, glasses, heat, heating, hot, hotter, inversion, liquid, liquids, mixing, model, modeling, modelling, physical, physics, pipette, pipetting, rising, science, side-by-side, sinking, sped up, surface, temperature inversion, thermodynamics, thermographic, thermography, time-lapse, timelapse, transfer, warmer, water

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Heat convection in water, demonstration

K006/9930 Rights Managed

Downloadable master

Duration: 00:00:08.09

Frame size: 1280x720

Frame rate: 30

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 62.4M


Capture format: Thermographic

Codec: H.264

Please contact Science Photo Library if you require the original, or other formats.


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