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indianaronald
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Convection heat transfer rate decided by Newton's cooling law doesn't have a relative velocity between the fluid and the solid surface term. But intuitively doesn't blowing faster on a hot surface make it cool quicker?
Convection heat transfer rate is independent of relative velocity because it is primarily driven by the temperature difference between the object and the surrounding fluid. The velocity of the fluid does not affect this temperature difference and therefore does not significantly impact the rate of heat transfer.
Convection heat transfer is the transfer of heat through the movement of a fluid, while conduction heat transfer occurs through direct contact between two objects and radiation heat transfer occurs through electromagnetic waves. Convection heat transfer is the most efficient form of heat transfer as it involves the bulk movement of a fluid which can carry more energy compared to conduction and radiation.
Yes, the rate of convection heat transfer can be increased by increasing the temperature difference between the object and the surrounding fluid, increasing the surface area of the object, or by increasing the velocity of the fluid. Additionally, using materials with high thermal conductivity can also increase the rate of heat transfer through convection.
Yes, the properties of the fluid, such as its density, viscosity, and specific heat, can affect the rate of convection heat transfer. For example, a more viscous fluid will have a lower rate of convection heat transfer compared to a less viscous fluid.
Natural convection is when the fluid motion is caused by density differences due to temperature variations, while forced convection is when the fluid motion is induced by an external force, such as a fan or pump. Natural convection typically occurs in still air or liquids, while forced convection can occur in both still and moving fluids with the help of an external force.