- Author
-
Shih, T. I. P.
- Title
- Computing Heat Transfer and Fluid Flow in Complex Engineered Systems. BFRL Seminar.
- Coporate
- Carnegie-Mellon Univ., Pittsburgh, PA
- Report
-
Video,
April 15, 1997,
- Keywords
-
heat transfer
|
fluid flow
|
computational fluid dynamics
- Abstract
- The advent of high-speed and large-memory computers has made it possible for computational fluid dynamics (CFD) to study complex problems involving fluid flow. Today, CFD is also used in the design and analysis of complex machines and processes that involve fluid flow. This talk addresses some of the issues that must be overcome before CFD can be relied upon as a design and analysis tool. This talk is divided into three parts. In the first part, the components of CFD are briefly described including mathematical modeling of physics, grid generation, principles used to construct numerical methods, numerical boundary conditions, and code development. In this part, the "pacing" items which limit the capabilities of CFD are outlined. In the second part, one "pacing" item - grid generation - is discussed. In this part, the various types of structured, unstructured, and mixed grid systems are compared in relation to their ability to provide solutions in a timely and cost-effective manner along with a strategy on how to automate the grid generation process. In the thrid part, results are presented for a number of example problems to illustrate the usefulness of CFD in revealing physics. Interspersed throughout the talk are CFD results that we have obtained for internal and film cooling of turbine blades; shock-wave/boundary-layer interctions with bleed relevant to inlet-bleed systems in turbojet engines; and particle/particle or droplet/droplet interactions.