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Sunday, October 23, 2011
Sunday, February 27, 2011
PHILOSOPHY OF COMPUTATIONAL FLUID DYNAMICS
All the mathematical sciences are founded on relations between physical laws and laws of numbers, so that the aim of exact science is to reduce the problems of nature to the determination of quantities by operations with numbers.
(James Clerk Maxwell, 1856)
In the late 19703, this approach (the use of supercomputers to solve aerodynamic problems) began to pay off. One early success was the experimental NASA aircraft called HiMAT (Highly Maneuverable Aircraft Technology), designed to test concepts of high maneuverability for the next generation of fighter planes. Wind tunnel tests of a preliminary design for HiMAT showed that it would have unacceptable drag at speeds near the speed of sound; if built that way the plane would be unable to provide any useful data. The cost of redesigning it in further wind tunnel tests would have been around $150,000 and would have unacceptably delayed the project. Instead, the wing was redesigned by a computer at a cost of $6,000.
(Paul E. Ceruzzi, Curator, National Air and Space Museum, in Beyond the Limits', The MIT Press, 1989)
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