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This color schlieren image reveals thermal convection from a human hand (in silhouette form) to the surrounding still atmosphere.. Two types of convective heat transfer may be distinguished:
For air with a pressure of 1 bar, the Prandtl numbers in the temperature range between −100 °C and +500 °C can be calculated using the formula given below. [2] The temperature is to be used in the unit degree Celsius.
Simulation of thermal convection in the Earth's mantle.Hot areas are shown in red, cold areas are shown in blue. A hot, less-dense material at the bottom moves upwards, and likewise, cold material from the top moves downwards.
Earth's longwave thermal radiation intensity, from clouds, atmosphere and surface.. Heat transfer is the energy exchanged between materials (solid/liquid/gas) as a result of a temperature difference.
An illustration of the structure of the Sun and a red giant star, showing their convective zones. These are the granular zones in the outer layers of the stars. A convection zone, convective zone or convective region of a star is a layer which is unstable due to convection.