Numerical Simulation Of Turbulence
W D McComb · 1990
Abstract In recent times, the rapid growth in both size and speed of digital computers has tended to change our perception of the turbulence problem. Twenty or so years ago, the clear aim-shared by engineers and theorists alike-was to derive transport equations by averaging the Navier-Stokes equation. Nowadays, the possibility of computers becoming powerful enough to simulate some flows of engineering interest leads us to consider a simplified form of the turbulence problem: in broad terms, can we use fundamental approaches to reduce the number of degrees of freedom? That is, can we reduce the size of the task for numerical simulation? It is because we must now consider questions of this kind that we include here a short treatment of numerical simulation (in itself, a large and important subject) as a coda to our treatment of the statistical theory of turbulence. In doing this, we shall have three broad purposes in mind.