Consider the following statements:The Fourier heat conduction equation Q = -kA(dT/dx) presumesi. Steady-state conditionsii. Constant value of thermal conductivity.iii. Uniform temperatures at the wall surfacesiv. One-dimensional heat flow.Which of the above statements are correct?

Heat transfer in fluids usually occurs through convection. Convection is the movement of heat by a fluid, such as air or water. The fluid moves from one location to another, transferring heat along with it. Convection currents are created in the fluid because the hotter part of the fluid is less dense than the cooler part. This creates an upward buoyant force on the hotter fluid, making it rise while the cooler, denser, fluid sinks. This causes a pattern of circulation. Convection can transfer larger amounts of heat than conduction. Convection heat transfer is a function of the fluid... Show more

Heat transfer in fluids usually occurs through convection. Convection is the movement of heat by a fluid, such as air or water. The fluid moves from one location to another, transferring heat along with it.
Convection currents are created in the fluid because the hotter part of the fluid is less dense than the cooler part. This creates an upward buoyant force on the hotter fluid, making it rise while the cooler, denser, fluid sinks. This causes a pattern of circulation.
Convection can transfer larger amounts of heat than conduction. Convection heat transfer is a function of the fluid physical properties, fluid velocity, and system geometry (pipe diameter).
Pipe flow is normally subjected to simultaneous heat transfer by convection and conduction.

Related Test: Manufacturing Engineering Practice Test: Heat Transfer

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