This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Substantial derivative conceptual experiment.svg en simple conceptual experiment used to explore the concept of substantial derivative stationary probe is placed in moving water body Even though the temperature of the body is steady time change of temperature will be measured at the probe because the temperature of the fluid is nonuniform