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Describes the use of a simple inexpensive model of a five-legged table in a physics course for industrial-design students to spark useful discussion about several aspects of statics. (WRM)

An annular liquid wall jet, or vortex tube, generated by helical injection inside a tube is studied experimentally as a possible means of fusion reactor shielding. The hollow confined vortex/swirling layer exhibits simultaneously all the complexities of swirling turbulence, free surface, droplet formation, bubble entrapment; all posing challenging diagnostic issues. The construction of flow apparatus and the choice of working liquid and seeding particles facilitate unimpeded optical access to the flow field. A split-screen, single-camera stereoscopic particle image velocimetry (SPIV) scheme is employed for flow field characterization. Image calibration and free surface identification issues are discussed. The interference in measurements of laser beam reflection at the interface are identified and discussed. Selected velocity measurements and turbulence statistics are presented at $$ \hbox{Re}_{\uplambda}=70$$ (Re = 3500 based on mean layer thickness).

Es un atlas de contenido general: físico, político, estadístico y mineralógico ; da su escala en la portada, general para todo el contenido, en cm y en toesas ; cada parte, presenta un mapa ínice, las hojas se presentan sueltas, y reunidas en dos cajas de 58 x 71 cm que juntas completan en atlas. Algunos mapas contienen notas explicativas que abarcan varias hojas, Copia digital. Madrid : Ministerio de Cultura. Dirección General del Libro, Archivos y Bibliotecas, 2010