The film, shot as a teaching aid for students of secondary specialized educational institutions, introduces students to the processes of convection and heat exchange. The film examines the effectiveness of using convective heat exchange in production.
Natural landscape in the foreground, a group of tourists going on a hike.
A rest stop for tourists.
Panorama of the cloudy sky.
Different types of clouds.
Cloud formation as an example of free convection.
Cloud transformation.
Cartoon explaining the process of convection or cloud formation, free convective motion.
Conditions of free convection.
The movement of warm air from pipes in production, from the heated surface of the earth in the desert, the movement of water heated by an electric coil.
A device that allows you to observe the movement of convective jets formed on a heated metal plate.
Formula for calculating the force that sets heated liquid or gas in motion.
The concept of forced convection.
An experiment to obtain forced convection.
Examples of the application of such convection.
Free convection occurs only under conditions of gravity.
Space station.
In space conditions, in the absence of gravity, heat exchange between the astronauts' bodies and the air can only be ensured by forced convection.
Filming of astronauts in orbit.
An astronaut in outer space, in whose spacesuit there is forced convection.
Skiers in a winter forest.
Athletes playing volleyball.
Competitions in a swimming pool.
The combined action of free and forced convection is used to heat rooms.
A cartoon explaining such a system.
When cooling metal and hardening it in the metallurgical industry, a combination of free and forced convection is used.
Loading a blast furnace.
All cooled elements in metallurgy use the principle of forced convection.
Tapping steel from a furnace.
Pouring steel into molds.
A cartoon explaining the cooling of a blast furnace using refrigerators with circulating water.
Panorama of a metallurgical plant.
A cartoon explaining the principle of convective heat transfer in most heat exchangers in production.
Cooling pipes in a pipe rolling plant.
The concept of heat transfer.
A cartoon explaining the heat transfer process.
Determining the temperature head.
Newton's formula for determining the density of the heat flux.
Alternating frames showing the use of cooling of products and equipment in production.
Cartoon explaining the dependence of the heat transfer coefficient on the speed of the coolant.
Reynolds experiment.
Convection, Heat dissipation, Coolant
Experiment with turbulent flow on a hydro-flume device.
Turbo flow has a complex structure.
We observe slow motion of liquid near the pipe walls.
This is the so-called viscous sublayer.
It occurs due to liquid adhesion to the solid surface of the walls.
Cartoon explaining the structure of turbulent flow.
The cartoon shows the action of an artificial turbulator.
When any body is externally flown, the heat transfer coefficient also depends on the nature of the coolant movement.
Turbulence around such a carrier is demonstrated.
The boundary layer is formed on the surface of the body.
Only the thickness of this layer changes the speed and temperature.
Vortices appear behind the body.
Alternating frames with carriers of different shapes.
The heat transfer coefficient increases if the oncoming flow becomes swirled.
Therefore, in heat exchangers, the tubes are staggered.
As a result, they are all flown by vortex flows.
When a jet hits the surface of a heated plate, the boundary layer thickness is small, so the heat transfer coefficient for jet flow is greater than for longitudinal flow.
Application of jet devices in metallurgical production.
Metals have the highest thermal conductivity and heat capacity.
Therefore, liquid metals are good coolants.
They are used in nuclear power plants in the first two circuits of nuclear power plant reactors.
Thermal diagram of a nuclear power plant.
Clouds.
Lake.
A boat is floating on the surface of the lake.
Tourists are cooking food over a fire.
People are steaming with birch twigs in a bathhouse.
Samovar.
Greenhouse.
Industrial installations using convective heat exchange.
Control panel for such an installation.
Astronauts are boarding a rocket for a flight into space.
Convection, Turbo flow, Coolant, Vortex flows, Heat dissipation, Jet flow