Nusselt Number Calculator

Enter the convective heat transfer coefficient, characteristic length, and thermal conductivity of the fluid to determine the Nusselt number.

• Thermal Conductivity Calculator (heat flux)
• Latent Heat Calculator
• Specific Heat Calculator
• Heat Loss Calculator

Nusselt Number Formula

The following equation can be used to calculate the Nusselt number of a given system.

N = h * L / k 

• Where N is the nusselt number
• h is the convective heat transfer coefficient
• L is the characteristic length
• k is the thermal conductivity of a fluid

Nusselt Number Definition

The Nusselt Number is a dimensionless quantity used in fluid dynamics and heat transfer to analyze the convective heat transfer between a solid surface and a fluid. It represents the ratio of the convective heat transfer to the conductive heat transfer across a boundary layer.

To calculate the Nusselt Number, the convective heat transfer coefficient, the characteristic length of the solid surface, and the thermal conductivity of the fluid are considered. The convective heat transfer coefficient describes the ability of the fluid to transfer heat, while the characteristic length represents the distance over which the heat transfer occurs.

The Nusselt Number is important because it helps engineers and researchers analyze and predict the efficiency of heat transfer in various systems. It allows them to understand how heat is exchanged between a solid surface and a fluid, which is crucial for designing efficient heat exchangers, cooling systems, and other thermal management devices.

By calculating the Nusselt Number, engineers can optimize the design of systems to enhance heat transfer and improve overall energy efficiency. It is a fundamental parameter in the field of heat transfer, enabling researchers to compare and evaluate different heat transfer mechanisms and phenomena.

Nusselt Number Example

FAQ