Question

Construct an explanation for why convection in orbit around Earthfor example, aboard the International Space Station --would be impossible .

Answer 1

The characteristics of the atmospheric pressure allow to find the reasons for the heat transfer processes.

• Convection does not occur due to the very small outside pressure, which implies that there is no mass of gases that can move

Thermal conduction is the process by which bodies exchange thermal energy (heat), these processes can be divided:

• Conduction. It is when the body is in contact and thermal energy is exchanged from the hottest to the coldest body, without movement of matter.

• Convection. It occurs when for the exchange of energy there is a movement of matter

• Radiation. The emission of electromagnetic radiation in the energy exchange medium occurs in all bodies at more than 0K.

In space at the height of the space station 400 km, than the area called the thermostat or ionosphere, in it the atmospheric pressure is very low.   There are ionized gases, nitrogen, oxygen and helium, but at very low pressure.

Because there are not enough gases around the space station, the convection processes that are due to the movement of a mass of gas do not exist.

At the height of the space station the most important mechanism of heat transfer is radiation.

In conclusion, the characteristics of atmospheric pressure allow us to find the reasons for the heat transfer processes.

• Convection does not occur due to the very small outside pressure, which implies that there is no mass of gases that can move

Learn more about the thermal conduction process here:

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