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Prandtl Number (GATE Previous Year Question) With Solution, Heat and Mass Transfer, GATE Video Lecture | Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

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FAQs on Prandtl Number (GATE Previous Year Question) With Solution, Heat and Mass Transfer, GATE Video Lecture - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

1. What is the Prandtl Number?
The Prandtl Number is a dimensionless number that represents the ratio of momentum diffusivity to thermal diffusivity in a fluid. It is defined as the ratio of the kinematic viscosity to the thermal diffusivity.
2. How is the Prandtl Number calculated?
The Prandtl Number (Pr) can be calculated using the formula: Pr = ν/α, where ν is the kinematic viscosity of the fluid and α is the thermal diffusivity of the fluid.
3. What does the Prandtl Number signify in heat and mass transfer?
In heat and mass transfer, the Prandtl Number signifies the relative importance of heat transfer to momentum transfer. A low Prandtl Number indicates that heat transfer is dominant, while a high Prandtl Number indicates that momentum transfer is dominant.
4. What is the significance of the Prandtl Number in engineering applications?
The Prandtl Number is significant in engineering applications as it helps in determining the heat transfer characteristics of a fluid. It is used to analyze and design heat exchangers, determine convective heat transfer coefficients, and predict flow regimes in various fluid flow systems.
5. How does the Prandtl Number affect boundary layer thickness?
The Prandtl Number affects boundary layer thickness by influencing the rate of heat transfer in the fluid. A low Prandtl Number results in a thinner boundary layer and faster heat transfer, while a high Prandtl Number leads to a thicker boundary layer and slower heat transfer.
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