The Nusselt number (Nu) is a dimensionless quantity used in heat transfer to quantify the relative importance of turbulent and laminar flow regimes. It is defin...
The Nusselt number (Nu) is a dimensionless quantity used in heat transfer to quantify the relative importance of turbulent and laminar flow regimes. It is defined as the ratio of the turbulent heat transfer coefficient to the laminar heat transfer coefficient.
The Nusselt number is a function of the flow regime, which can be characterized by the dimensionless number called Reynolds number (Re). The Nusselt number is generally lower for turbulent flow and higher for laminar flow.
The Nusselt number is often used to predict the Nusselt number of a flow regime. The Nusselt number can be estimated using empirical correlations or by solving governing equations for turbulent and laminar flow.
The Nusselt number provides valuable insights into the relative importance of different flow regimes in terms of heat transfer. By understanding the Nusselt number, engineers and researchers can make informed decisions about heat transfer systems, such as selecting the appropriate type of pump or fan for a particular application