Free convection flow depends on

Solution (By Examveda Team)

Option A: Density
In free convection, the density of the fluid plays a crucial role in determining the buoyancy forces that drive the flow.
When the fluid heats up, its density decreases, leading to an upward flow due to the buoyancy effect, which is a key characteristic of free convection.

Option B: Coefficient of viscosity
The coefficient of viscosity also influences the flow in free convection.
Viscosity affects the resistance to flow and the development of velocity profiles in the fluid.
Higher viscosity tends to slow down the flow, whereas lower viscosity allows for a more efficient convection process.

Option C: Gravitational force
The gravitational force is essential in free convection, as it is responsible for the buoyancy effect.
The difference in temperature within the fluid creates density variations, and the gravitational force acts on these density differences to drive the convection currents.

Option D: All of these
The correct answer is Option D: All of these because free convection is influenced by all the factors mentioned—density, viscosity, and gravitational force.
All of these factors work together to determine the behavior and efficiency of convection flow in a fluid.