Computation as a Tool of Fluid Dynamics Research

Over the last several decades, computational fluid dynamics (CFD) has become an indispensable tool of fluid dynamics research. The reason is that the Navier-Stokes equations are a remarkably precise description of the behavior of many real fluids, so that their numerical solutions can be studied as a surrogate for real fluids. CFD studies have several unique advantages in fluid dynamics research. First, simulations provide access to three-dimensional velocity and scalar fields, allowing determination of quantities that are difficult or impossible to measure. Second, computer simulations allow detailed specification of the environment in which a flow is evolving (e.g. initial conditions, boundary conditions, forcing). Finally, CFD simulations can serve as non-physical experiments, allowing hypotheses regarding the causes of observed phenomena to be tested directly. In this talk we'll discuss the use of CFD in fundamental fluid dynamics research with several illustrative examples. We'll also discuss the limitations of CFD in fluid dynamics research, and potential future opportunities for its application.