Question
Download Solution PDFFor which of these configurations is a minimum temperature difference required for natural convection to set in
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- The mechanism of heat transfer or fluid motion due to density difference is known as free convection.
- The warmer fluid is replaced by colder fluid creating convection current. The force which induces these convection is called a buoyancy force which is due to the presence of a density gradient within the fluid and a body force.
- For free convection Nusselt number is a function of Prandlt number and Grashof Number.
- For fluid over a heated horizontal plate, Grashof number is maximum so Nusselt number will also be maximum i.e. convection dominates. So minimum temperature difference will be required fluid over a horizontal plate.
Last updated on Jul 2, 2025
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