Was reading an old CFD presentation and came across this.
Theoretical Fluid dynamics: Most important. Everyone HAS to learn it.
Experimental Fluid dynamics: Important. Usually, everyone believes it except the person that conducted the experiment.
Computational Fluid dynamics: Also important. Usually, no one believes it except the person that performed the calculations.
A good engineer understands the pro’s and con’s of all three methods, and should be in a position to assess which one is best under the circumstances.