Computational fluid dynamics, usually abbreviated as CFD, is a branch of fluid mechanics that uses numerical analysis and algorithms to solve and analyze problems that involve fluid flows. Computers are used to perform the calculations required to simulate the interaction of liquids and gases with surfaces defined by boundary conditions.
The difference with Gas Turbine Flow is the fact that we live in gas turbine ducts. We not only have the theoretical experience, but also the practical experience. We are able to compare real world physical measurements with our CFD modeling and make sure our results are accurate and make sense.