The industrial process of bombarding long-lived radioactive isotopes with fast neutrons to convert them into stable or shorter-lived elements. This technique is essential for reducing both the radiotoxicity and the required isolation time of high-level nuclear waste in geological repositories.
A dimensionless parameter that measures the physical size and heat transfer capability of a heat exchanger relative to the fluid heat capacity rate. A higher NTU indicates a larger, more effective thermal design capable of closer temperature approaches.
Nusselt Correlation
An empirical or analytical relationship used to determine the Nusselt number, which compares convective heat transfer to conductive heat transfer across a fluid boundary layer. These correlations are critical for predicting the real-world thermal performance of industrial heat exchangers.
Nusselt Number
The dimensionless ratio of convective heat transfer to conductive heat transfer across a fluid boundary layer. It is the primary metric used to size and evaluate the efficiency of industrial heat exchangers.