Editing Computational fluid dynamics (section)

===Unsteady aerodynamics===
CFD made a major break through in late 70s with the introduction of LTRAN2, a 2-D code to model oscillating airfoils based on [[transonic]] small perturbation theory by Ballhaus and associates.<ref>{{cite journal |last1=Adamson |first1=M.R. |title=Biographies |journal=IEEE Annals of the History of Computing |date=January 2006 |volume=28 |issue=1 |pages=99–103 |doi=10.1109/MAHC.2006.5 }}</ref> It uses a Murman-Cole switch algorithm for modeling the moving shock-waves.<ref name="Murman Cole 1971">{{cite journal |last1=Murman |first1=Earll M. |last2=Cole |first2=Julian D. |title=Calculation of plane steady transonic flows |journal=AIAA Journal |date=January 1971 |volume=9 |issue=1 |pages=114–121 |doi=10.2514/3.6131 |bibcode=1971AIAAJ...9..114C }}</ref> Later it was extended to 3-D with use of a rotated difference scheme by AFWAL/Boeing that resulted in LTRAN3.<ref>{{cite journal |last1=Jameson |first1=Antony |title=Iterative solution of transonic flows over airfoils and wings, including flows at mach 1 |journal=Communications on Pure and Applied Mathematics |date=May 1974 |volume=27 |issue=3 |pages=283–309 |doi=10.1002/cpa.3160270302 }}</ref><ref>Borland, C.J., "XTRAN3S - Transonic Steady and Unsteady Aerodynamics for Aeroelastic Applications,"AFWAL-TR-85-3214, Air Force Wright Aeronautical Laboratories, Wright-Patterson AFB, OH, January, 1986</ref>