02160cam a2200337Ma 4500011444338MiAaHDL20141009010000.0m d cr bn ---auaua100201s1970 dcua f000 0 eng dsdr-uiuc6401331sdr-uiuc6235073(OCoLC)647696056(OCoLC)146478AD#STFUIUUNAS 1.14:D-5964NASA-TN-D-5964Costen, Robert C.An equation for vortex motion including effects of buoyancy and sources with applications to tornadoes.Robert C. Costen.Washington, D.C. :National Aeronautics and Space Administration :[For sale by the Office of Technical Services, Dept. of Commerce],[1970]iv, 62 p. :ill. ;26 cm.NASA technical note ;NASA TN D-5964Prepared at Langley Research Center."October 1970."Major NASA subject terms: Equation for vortex motion, hydromagnetic vortex, buoyant vortex, source - vortex, tornado, cyclone.Includes bibliographical references (p. 60-61).A new equation is derived for the motion of vorticity in a general fluid, including the effects of viscosity, compressibility, nonhomogeneity, and nonconservative forces. The equation holds, in particular, for vortices which may not move with the fluid. A linearized form of this equation is applied to tornado cyclones and to the twin tornado of April 11, 1965, near Elkhart, Indiana. It is shown that the displacement of tornado cyclones to the right of the mean tropospheric winds may be accounted for by the upward efflux of fluid from the cyclone into the jet stream. Also, the retarded revolution rate of the twin tornado may be due in part to an attractive "buoyancy" force acting on the partially rarefied cores of the pair.Mode of access: Internet.Tornado.Winds.Langley Research Center.United States.National Aeronautics and Space Administration.01144433820101109112443.020141009010000.020141112165512.02025-01-02T19:12:17Z2025-01-02T18:30:02ZSDR-UIUCUNKNOWNloader.pl-003-020BKsdr-uiuc6401331uiugSDRUIUCuiug.30112106879254UIU6401331UIUUIUC20250102googleuiug.301121068792541970pdbibUS fed docUIUUIUC20260514googleuiug.301121091521541970pdbibUS fed doc