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  2. Convection (heat transfer) - Wikipedia

    en.wikipedia.org/wiki/Convection_(Heat_transfer)

    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:

  3. Convection - Wikipedia

    en.wikipedia.org/wiki/Convection

    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.

  4. Prandtl number - Wikipedia

    en.wikipedia.org/wiki/Prandtl_number

    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.

  5. Heat transfer - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer

    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.

  6. Heat engine - Wikipedia

    en.wikipedia.org/wiki/Heat_engine

    A heat engine is a system that transfers thermal energy to do mechanical or electrical work. [1] [2] While originally conceived in the context of mechanical energy, the concept of the heat engine has been applied to various other kinds of energy, particularly electrical, since at least the late 19th century.

  7. Gas constant - Wikipedia

    en.wikipedia.org/wiki/Gas_constant

    Heating-gas-at-constant-pressure-and-constant-volume. The molar gas constant (also known as the gas constant, universal gas constant, or ideal gas constant) is denoted by the symbol R or R.