RAZZABONI

ITALY (see also List of Individuals)

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19.5.1827 S. Felice-Panaro/I - 28.7.1893 Bologna/I

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Cesare Razzaboni graduated as a mathematician from the University of Modena in 1849 and there continued as an assistant in geometry first, took interest in hydraulics from 1854 and from the mid 1860s contributed to rational mechanics. He moved in 1871 to the University of Rome and finally settled in Bologna, where he was appointed in 1877 professor of hydraulics at the Engineering Polytechnic. He was also a deputy of the Bologna parliament in the 1880s. Razzaboni was a Member of both the Accademia Nazionale dei Lincei, and the Accademia delle Scienze of Bologna and published his main papers in their proceedings.

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Razzaboni contributed extensively to the irrigation and drainage of the Emilia e Romagna province in Central Italy. He also initiated works of the Po River to reduce the damages to the large plains after floods. In hydraulics, Razzaboni has contributed a large work to the understanding of orifice flows with a pipe addition. The effect of such an addition was originally investigated by Gian Battista Venturi (1746-1822) who found a notable pressure reduction in the relatively short pipe that could be used for fluid pumping. Razzaboni's work conducted some 100 years later is more complete and one of the last contribution after those of Julius Weisbach (1806-1871). Razzaboni also analyzed the height of a water jet issued into the atmosphere. He noted a considerable energy loss depending on the jet diameter and the jet velocity. This phenomenon was extensively investigated by the American Freeman at about the same time and therefore significantly contributed to knowledge in fire mitigation.

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_{Cavani, F. (1899). Elogio storico del Prof. Cesare Razzaboni. Scuola d'Applicazione degli Ingegneri: Bologna. P}

_{Razzaboni, C. (1887). Sul modo di dedurre le equazioni generali del moto dei fluidi e le particolari relative al moto lineare dei liquidi. Gamberini: Bologna.}

_{Razzaboni, C. (1888). Sopra alcune modificazioni in un mulinello idrotachimetro a volante di Robinson. Gamberini: Bologna.}

_{Razzaboni, C. (1890). Risultato di esperienze idrometriche sopra tubi addizionali conici divergenti. Reale Accademia delle Scienze. Gamberini: Bologna.}

_{Razzaboni, C. (1893). Sull'altezza dei getti d'acqua di luci scolpite in paretti sottili in rapporto col carico che li produce e col diametro delle luci d'efflusso. Accademia delle Scienze, Istituto di Bologna. Gamberini e Parmeggiani: Bologna. http://www.matematica.unimore.it/0attivita/storia.pdf P}