Heat transfer is the exchange of heat between two mediums at different temperatures across a dividing wall. Conduction is another method for transferring heat from one thing to another.
The heat exchange process transfers heat energy from a high temperature location to a low temperature location until the temperature is balanced, at which point it ceases. And which of the following conditions must exist for heat to flow from one object to another?
Conducting bodies should be in direct touch with one another.
The oscillation of the molecules causes heat conduction rather than the mobility of the molecules.
The bodies must be in direct touch for the molecules to vibrate.
The conducting bodies’ temperatures should vary.
Heat transfer happens only when there is a temperature differential between the bodies engaged in conduction.
Heat moves from the body with the highest temperature to the body with the lowest temperature.
When two bodies reach the same temperature, equilibrium is reached and no more heat transmission is feasible.
Material bodies in touch with a temperature differential. Heat energy is constantly moved from a higher to a lower temperature zone. Conduction mechanism in a gas: The molecules of a given gas have greater velocities in a higher temperature zone, moving in a continuous random motion, clashing with each other and transferring a large quantity of energy and momentum.
As a result, as a molecule travels from a higher to a lower temperature zone, kinetic energy is transferred to the lower temperature region, and this energy transfer continues until the system reaches an equilibrium temperature.
Material bodies may or may not come into touch with one another.
Convection mechanism between a heated metal plate
When compared to a hot metal plate in still air, a hot metal plate held beneath a fan cools quicker.
Heat is convected here.
The temperature gradient is determined by the pace at which the fluid removes heat.
The heat transported from the hot metal plate to the fluid at the plate’s wall is plainly a conduction process, but the total heat transfer is a convective process.
Convection heat transmission is affected by fluid viscosity as well as thermal parameters such as conductivity, specific heat, density, and so on.
Heat transmission also happens in the presence of a perfect vacuum.
Radiation mechanism: Thermal radiation is electromagnetic radiation that arises as a result of temperature differences.
When two bodies have different temperatures, the temperature difference functions as a driving force for heat to move from the higher temperature body to the lower temperature body.
It may be compared to the flow of water. When water is placed at a higher location, it tends to flow to a lower location. Many factors may influence the HT rate, including the existence of a convecting medium (natural or artificial), thermal conductivity, heat capacity, and so on.
Heat transfer happens only when there is a temperature differential between the bodies engaged in conduction. Heat moves from the body with the highest temperature to the body with the lowest temperature. When two bodies reach the same temperature, equilibrium is reached and no more heat transmission is feasible.
For heat to transfer from one thing to another, which of the following requirements must be met? The two things must come into actual touch with one another.
https://bowie1983book.com/ will answer which of the following conditions must exist for heat to flow from one object to another?